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Merge pull request #9318 from Prerana-GB/ibgp_knob
bgp: BGP knob for faster convergence of bgp sessions
This commit is contained in:
Donatas Abraitis
GitHub
commit
e5fbfe01ae
@ -2196,7 +2196,8 @@ void bgp_fsm_nht_update(struct peer *peer, bool has_valid_nexthops)
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case OpenConfirm:
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case OpenConfirm:
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case Established:
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case Established:
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if (!has_valid_nexthops
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if (!has_valid_nexthops
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&& (peer->gtsm_hops == BGP_GTSM_HOPS_CONNECTED))
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&& (peer->gtsm_hops == BGP_GTSM_HOPS_CONNECTED
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|| peer->bgp->fast_convergence))
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BGP_EVENT_ADD(peer, TCP_fatal_error);
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BGP_EVENT_ADD(peer, TCP_fatal_error);
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case Clearing:
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case Clearing:
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case Deleted:
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case Deleted:
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@ -4190,6 +4190,28 @@ DEFUN (neighbor_remote_as,
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return peer_remote_as_vty(vty, argv[idx_peer]->arg,
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return peer_remote_as_vty(vty, argv[idx_peer]->arg,
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argv[idx_remote_as]->arg);
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argv[idx_remote_as]->arg);
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}
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}
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/* Enable fast convergence of bgp sessions. If this is enabled, bgp
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* sessions do not wait for hold timer expiry to bring down the sessions
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* when nexthop becomes unreachable
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*/
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DEFUN(bgp_fast_convergence, bgp_fast_convergence_cmd, "bgp fast-convergence",
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BGP_STR "Fast convergence for bgp sessions\n")
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{
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VTY_DECLVAR_CONTEXT(bgp, bgp);
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bgp->fast_convergence = true;
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return CMD_SUCCESS;
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}
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DEFUN(no_bgp_fast_convergence, no_bgp_fast_convergence_cmd,
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"no bgp fast-convergence",
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NO_STR BGP_STR "Fast convergence for bgp sessions\n")
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{
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VTY_DECLVAR_CONTEXT(bgp, bgp);
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bgp->fast_convergence = false;
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return CMD_SUCCESS;
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}
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static int peer_conf_interface_get(struct vty *vty, const char *conf_if,
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static int peer_conf_interface_get(struct vty *vty, const char *conf_if,
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int v6only,
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int v6only,
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@ -17198,6 +17220,9 @@ int bgp_config_write(struct vty *vty)
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if (CHECK_FLAG(bgp->flags, BGP_FLAG_SHUTDOWN))
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if (CHECK_FLAG(bgp->flags, BGP_FLAG_SHUTDOWN))
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vty_out(vty, " bgp shutdown\n");
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vty_out(vty, " bgp shutdown\n");
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if (bgp->fast_convergence)
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vty_out(vty, " bgp fast-convergence\n");
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if (bgp->srv6_enabled) {
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if (bgp->srv6_enabled) {
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vty_frame(vty, " !\n segment-routing srv6\n");
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vty_frame(vty, " !\n segment-routing srv6\n");
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if (strlen(bgp->srv6_locator_name))
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if (strlen(bgp->srv6_locator_name))
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@ -17463,6 +17488,10 @@ void bgp_vty_init(void)
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install_element(CONFIG_NODE, &bgp_set_route_map_delay_timer_cmd);
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install_element(CONFIG_NODE, &bgp_set_route_map_delay_timer_cmd);
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install_element(CONFIG_NODE, &no_bgp_set_route_map_delay_timer_cmd);
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install_element(CONFIG_NODE, &no_bgp_set_route_map_delay_timer_cmd);
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/* bgp fast-convergence command */
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install_element(BGP_NODE, &bgp_fast_convergence_cmd);
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install_element(BGP_NODE, &no_bgp_fast_convergence_cmd);
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/* global bgp update-delay command */
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/* global bgp update-delay command */
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install_element(CONFIG_NODE, &bgp_global_update_delay_cmd);
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install_element(CONFIG_NODE, &bgp_global_update_delay_cmd);
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install_element(CONFIG_NODE, &no_bgp_global_update_delay_cmd);
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install_element(CONFIG_NODE, &no_bgp_global_update_delay_cmd);
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@ -3166,7 +3166,7 @@ static struct bgp *bgp_create(as_t *as, const char *name,
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bgp->reject_as_sets = false;
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bgp->reject_as_sets = false;
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bgp->condition_check_period = DEFAULT_CONDITIONAL_ROUTES_POLL_TIME;
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bgp->condition_check_period = DEFAULT_CONDITIONAL_ROUTES_POLL_TIME;
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bgp_addpath_init_bgp_data(&bgp->tx_addpath);
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bgp_addpath_init_bgp_data(&bgp->tx_addpath);
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bgp->fast_convergence = false;
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bgp->as = *as;
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bgp->as = *as;
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#ifdef ENABLE_BGP_VNC
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#ifdef ENABLE_BGP_VNC
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@ -749,6 +749,8 @@ struct bgp {
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/* Process Queue for handling routes */
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/* Process Queue for handling routes */
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struct work_queue *process_queue;
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struct work_queue *process_queue;
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bool fast_convergence;
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/* BGP Conditional advertisement */
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/* BGP Conditional advertisement */
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uint32_t condition_check_period;
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uint32_t condition_check_period;
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uint32_t condition_filter_count;
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uint32_t condition_filter_count;
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@ -4354,3 +4354,35 @@ Show command json output:
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.. [bgp-route-osci-cond] McPherson, D. and Gill, V. and Walton, D., "Border Gateway Protocol (BGP) Persistent Route Oscillation Condition", IETF RFC3345
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.. [bgp-route-osci-cond] McPherson, D. and Gill, V. and Walton, D., "Border Gateway Protocol (BGP) Persistent Route Oscillation Condition", IETF RFC3345
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.. [stable-flexible-ibgp] Flavel, A. and M. Roughan, "Stable and flexible iBGP", ACM SIGCOMM 2009
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.. [stable-flexible-ibgp] Flavel, A. and M. Roughan, "Stable and flexible iBGP", ACM SIGCOMM 2009
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.. [ibgp-correctness] Griffin, T. and G. Wilfong, "On the correctness of IBGP configuration", ACM SIGCOMM 2002
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.. [ibgp-correctness] Griffin, T. and G. Wilfong, "On the correctness of IBGP configuration", ACM SIGCOMM 2002
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.. _bgp-fast-convergence:
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BGP fast-convergence support
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============================
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Whenever BGP peer address becomes unreachable we must bring down the BGP
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session immediately. Currently only single-hop EBGP sessions are brought
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down immediately.IBGP and multi-hop EBGP sessions wait for hold-timer
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expiry to bring down the sessions.
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This new configuration option helps user to teardown BGP sessions immediately
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whenever peer becomes unreachable.
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.. clicmd:: bgp fast-convergence
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This configuration is available at the bgp level. When enabled, configuration
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is applied to all the neighbors configured in that bgp instance.
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.. code-block:: frr
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router bgp 64496
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neighbor 10.0.0.2 remote-as 64496
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neighbor fd00::2 remote-as 64496
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bgp fast-convergence
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!
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address-family ipv4 unicast
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redistribute static
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exit-address-family
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!
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address-family ipv6 unicast
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neighbor fd00::2 activate
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exit-address-family
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232
tests/topotests/bgp_ecmp_topo3/ibgp_ecmp_topo3.json
Normal file
232
tests/topotests/bgp_ecmp_topo3/ibgp_ecmp_topo3.json
Normal file
@ -0,0 +1,232 @@
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{
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"address_types": [
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"ipv4",
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"ipv6"
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],
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"ipv4base": "10.0.0.0",
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"ipv4mask": 24,
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"ipv6base": "fd00::",
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"ipv6mask": 64,
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"link_ip_start": {
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"ipv4": "10.0.0.0",
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"v4mask": 24,
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"ipv6": "fd00::",
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"v6mask": 64
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},
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"lo_prefix": {
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"ipv4": "1.0.",
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"v4mask": 32,
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"ipv6": "2001:DB8:F::",
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"v6mask": 128
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},
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"routers": {
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"r1": {
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"links": {
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"lo": {
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"ipv4": "auto",
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"ipv6": "auto",
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"type": "loopback"
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},
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"r2-link1": {
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"ipv4": "auto",
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"ipv6": "auto"
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}
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},
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"bgp": {
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"local_as": "100",
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"address_family": {
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"ipv4": {
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"unicast": {
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"neighbor": {
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"r2": {
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"dest_link": {
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"r1-link1": {}
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}
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}
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}
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}
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},
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"ipv6": {
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"unicast": {
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"neighbor": {
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"r2": {
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"dest_link": {
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"r1-link1": {}
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}
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}
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}
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}
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}
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}
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}
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},
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"r2": {
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"links": {
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"lo": {
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"ipv4": "auto",
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"ipv6": "auto",
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"type": "loopback"
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},
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"r1-link1": {
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"ipv4": "auto",
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"ipv6": "auto"
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},
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"r3-link1": {
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"ipv4": "auto",
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"ipv6": "auto"
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},
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"r3-link2": {
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"ipv4": "auto",
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"ipv6": "auto"
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}
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},
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"bgp": {
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"local_as": "100",
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"address_family": {
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"ipv4": {
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"unicast": {
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"neighbor": {
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"r1": {
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"dest_link": {
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"r2-link1": {}
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}
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},
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"r3": {
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"dest_link": {
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"r2-link1": {
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"keepalivetimer": 60,
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"holddowntimer": 180,
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"next_hop_self": true
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},
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"r2-link2": {
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"keepalivetimer": 60,
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"holddowntimer": 180,
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"next_hop_self": true
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}
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}
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}
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},
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"redistribute": [
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{
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"redist_type": "static"
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}
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]
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}
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},
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"ipv6": {
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"unicast": {
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"neighbor": {
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"r1": {
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"dest_link": {
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"r2-link1": {}
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}
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},
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"r3": {
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"dest_link": {
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"r2-link1": {
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"keepalivetimer": 60,
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"holddowntimer": 180,
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"next_hop_self": true
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},
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"r2-link2": {
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"keepalivetimer": 60,
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"holddowntimer": 180,
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"next_hop_self": true
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}
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}
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}
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},
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"redistribute": [
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{
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"redist_type": "static"
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}
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]
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}
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}
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}
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}
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},
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"r3": {
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"links": {
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"lo": {
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"ipv4": "auto",
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"ipv6": "auto",
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"type": "loopback"
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},
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"r2-link1": {
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"ipv4": "auto",
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"ipv6": "auto"
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},
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"r2-link2": {
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"ipv4": "auto",
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"ipv6": "auto"
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}
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},
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"route_maps": {
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"rmap_global": [{
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"action": "permit",
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"set": {
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"ipv6": {
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"nexthop": "prefer-global"
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}
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}
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}]
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},
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"bgp": {
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"local_as": "100",
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"address_family": {
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"ipv4": {
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"unicast": {
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"maximum_paths": {
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"ibgp": 2
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},
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"neighbor": {
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"r2": {
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"dest_link": {
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"r3-link1": {
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"keepalivetimer": 60,
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"holddowntimer": 180
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},
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"r3-link2": {
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"keepalivetimer": 60,
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"holddowntimer": 180
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|
}
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|
}
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|
}
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|
}
|
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|
}
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|
},
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"ipv6": {
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"unicast": {
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"maximum_paths": {
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"ibgp": 2
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|
},
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"neighbor": {
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"r2": {
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|
"dest_link": {
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|
"r3-link1": {
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|
"keepalivetimer": 60,
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|
"holddowntimer": 180,
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|
"route_maps": [{
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|
"name": "rmap_global",
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|
"direction": "in"
|
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|
}]
|
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|
},
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|
"r3-link2": {
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|
"keepalivetimer": 60,
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|
"holddowntimer": 180,
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|
"route_maps": [{
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|
"name": "rmap_global",
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|
"direction": "in"
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|
}]
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|
}
|
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|
}
|
||||||
|
}
|
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|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
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|
}
|
||||||
|
}
|
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|
}
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|
}
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310
tests/topotests/bgp_ecmp_topo3/test_ibgp_ecmp_topo3.py
Normal file
310
tests/topotests/bgp_ecmp_topo3/test_ibgp_ecmp_topo3.py
Normal file
@ -0,0 +1,310 @@
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|
#!/usr/bin/env python
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|
|
||||||
|
#
|
||||||
|
# Copyright (c) 2019 by VMware, Inc. ("VMware")
|
||||||
|
# Used Copyright (c) 2018 by Network Device Education Foundation, Inc.
|
||||||
|
# ("NetDEF") in this file.
|
||||||
|
#
|
||||||
|
# Permission to use, copy, modify, and/or distribute this software
|
||||||
|
# for any purpose with or without fee is hereby granted, provided
|
||||||
|
# that the above copyright notice and this permission notice appear
|
||||||
|
# in all copies.
|
||||||
|
#
|
||||||
|
# THE SOFTWARE IS PROVIDED "AS IS" AND VMWARE DISCLAIMS ALL WARRANTIES
|
||||||
|
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
||||||
|
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL VMWARE BE LIABLE FOR
|
||||||
|
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY
|
||||||
|
# DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
|
||||||
|
# WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
|
||||||
|
# ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
|
||||||
|
# OF THIS SOFTWARE.
|
||||||
|
#
|
||||||
|
|
||||||
|
|
||||||
|
"""
|
||||||
|
Following tests are covered to test ecmp functionality on iBGP.
|
||||||
|
1. Verify bgp fast-convergence functionality
|
||||||
|
"""
|
||||||
|
import os
|
||||||
|
import sys
|
||||||
|
import time
|
||||||
|
import json
|
||||||
|
import pytest
|
||||||
|
from time import sleep
|
||||||
|
|
||||||
|
# Save the Current Working Directory to find configuration files.
|
||||||
|
CWD = os.path.dirname(os.path.realpath(__file__))
|
||||||
|
sys.path.append(os.path.join(CWD, "../"))
|
||||||
|
sys.path.append(os.path.join(CWD, "../../"))
|
||||||
|
|
||||||
|
# pylint: disable=C0413
|
||||||
|
# Import topogen and topotest helpers
|
||||||
|
from lib.topogen import Topogen, get_topogen
|
||||||
|
from mininet.topo import Topo
|
||||||
|
|
||||||
|
from lib.common_config import (
|
||||||
|
start_topology,
|
||||||
|
write_test_header,
|
||||||
|
write_test_footer,
|
||||||
|
verify_rib,
|
||||||
|
create_static_routes,
|
||||||
|
check_address_types,
|
||||||
|
interface_status,
|
||||||
|
reset_config_on_routers,
|
||||||
|
required_linux_kernel_version,
|
||||||
|
shutdown_bringup_interface,
|
||||||
|
apply_raw_config,
|
||||||
|
)
|
||||||
|
from lib.topolog import logger
|
||||||
|
from lib.bgp import verify_bgp_convergence, create_router_bgp, clear_bgp
|
||||||
|
from lib.topojson import build_topo_from_json, build_config_from_json
|
||||||
|
|
||||||
|
|
||||||
|
pytestmark = [pytest.mark.bgpd, pytest.mark.staticd]
|
||||||
|
|
||||||
|
|
||||||
|
# Reading the data from JSON File for topology and configuration creation
|
||||||
|
jsonFile = "{}/ibgp_ecmp_topo3.json".format(CWD)
|
||||||
|
|
||||||
|
try:
|
||||||
|
with open(jsonFile, "r") as topoJson:
|
||||||
|
topo = json.load(topoJson)
|
||||||
|
except IOError:
|
||||||
|
assert False, "Could not read file {}".format(jsonFile)
|
||||||
|
|
||||||
|
# Global variables
|
||||||
|
NEXT_HOPS = {"ipv4": [], "ipv6": []}
|
||||||
|
NETWORK = {"ipv4": "192.168.1.10/32", "ipv6": "fd00:0:0:1::10/128"}
|
||||||
|
NEXT_HOP_IP = {"ipv4": "10.0.0.1", "ipv6": "fd00::1"}
|
||||||
|
BGP_CONVERGENCE = False
|
||||||
|
|
||||||
|
|
||||||
|
class CreateTopo(Topo):
|
||||||
|
"""
|
||||||
|
Test topology builder.
|
||||||
|
|
||||||
|
* `Topo`: Topology object
|
||||||
|
"""
|
||||||
|
|
||||||
|
def build(self, *_args, **_opts):
|
||||||
|
"""Build function."""
|
||||||
|
tgen = get_topogen(self)
|
||||||
|
|
||||||
|
# Building topology from json file
|
||||||
|
build_topo_from_json(tgen, topo)
|
||||||
|
|
||||||
|
|
||||||
|
def setup_module(mod):
|
||||||
|
"""
|
||||||
|
Sets up the pytest environment.
|
||||||
|
|
||||||
|
* `mod`: module name
|
||||||
|
"""
|
||||||
|
global NEXT_HOPS, INTF_LIST_R3, INTF_LIST_R2, TEST_STATIC
|
||||||
|
global ADDR_TYPES
|
||||||
|
|
||||||
|
testsuite_run_time = time.asctime(time.localtime(time.time()))
|
||||||
|
logger.info("Testsuite start time: {}".format(testsuite_run_time))
|
||||||
|
logger.info("=" * 40)
|
||||||
|
|
||||||
|
logger.info("Running setup_module to create topology")
|
||||||
|
|
||||||
|
# This function initiates the topology build with Topogen...
|
||||||
|
tgen = Topogen(CreateTopo, mod.__name__)
|
||||||
|
|
||||||
|
# Starting topology, create tmp files which are loaded to routers
|
||||||
|
# to start deamons and then start routers
|
||||||
|
start_topology(tgen)
|
||||||
|
|
||||||
|
# Creating configuration from JSON
|
||||||
|
build_config_from_json(tgen, topo)
|
||||||
|
|
||||||
|
# Don't run this test if we have any failure.
|
||||||
|
if tgen.routers_have_failure():
|
||||||
|
pytest.skip(tgen.errors)
|
||||||
|
|
||||||
|
# Api call verify whether BGP is converged
|
||||||
|
ADDR_TYPES = check_address_types()
|
||||||
|
|
||||||
|
BGP_CONVERGENCE = verify_bgp_convergence(tgen, topo)
|
||||||
|
assert BGP_CONVERGENCE is True, "setup_module :Failed \n Error:" " {}".format(
|
||||||
|
BGP_CONVERGENCE
|
||||||
|
)
|
||||||
|
|
||||||
|
# STATIC_ROUTE = True
|
||||||
|
logger.info("Running setup_module() done")
|
||||||
|
|
||||||
|
|
||||||
|
def teardown_module():
|
||||||
|
"""
|
||||||
|
Teardown the pytest environment.
|
||||||
|
|
||||||
|
* `mod`: module name
|
||||||
|
"""
|
||||||
|
|
||||||
|
logger.info("Running teardown_module to delete topology")
|
||||||
|
|
||||||
|
tgen = get_topogen()
|
||||||
|
|
||||||
|
# Stop toplogy and Remove tmp files
|
||||||
|
tgen.stop_topology()
|
||||||
|
|
||||||
|
|
||||||
|
def static_or_nw(tgen, topo, tc_name, test_type, dut):
|
||||||
|
|
||||||
|
if test_type == "redist_static":
|
||||||
|
input_dict_static = {
|
||||||
|
dut: {
|
||||||
|
"static_routes": [
|
||||||
|
{"network": NETWORK["ipv4"], "next_hop": NEXT_HOP_IP["ipv4"]},
|
||||||
|
{"network": NETWORK["ipv6"], "next_hop": NEXT_HOP_IP["ipv6"]},
|
||||||
|
]
|
||||||
|
}
|
||||||
|
}
|
||||||
|
logger.info("Configuring static route on router %s", dut)
|
||||||
|
result = create_static_routes(tgen, input_dict_static)
|
||||||
|
assert result is True, "Testcase {} : Failed \n Error: {}".format(
|
||||||
|
tc_name, result
|
||||||
|
)
|
||||||
|
|
||||||
|
input_dict_2 = {
|
||||||
|
dut: {
|
||||||
|
"bgp": {
|
||||||
|
"address_family": {
|
||||||
|
"ipv4": {
|
||||||
|
"unicast": {"redistribute": [{"redist_type": "static"}]}
|
||||||
|
},
|
||||||
|
"ipv6": {
|
||||||
|
"unicast": {"redistribute": [{"redist_type": "static"}]}
|
||||||
|
},
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
logger.info("Configuring redistribute static route on router %s", dut)
|
||||||
|
result = create_router_bgp(tgen, topo, input_dict_2)
|
||||||
|
assert result is True, "Testcase {} : Failed \n Error: {}".format(
|
||||||
|
tc_name, result
|
||||||
|
)
|
||||||
|
|
||||||
|
elif test_type == "advertise_nw":
|
||||||
|
input_dict_nw = {
|
||||||
|
dut: {
|
||||||
|
"bgp": {
|
||||||
|
"address_family": {
|
||||||
|
"ipv4": {
|
||||||
|
"unicast": {
|
||||||
|
"advertise_networks": [{"network": NETWORK["ipv4"]}]
|
||||||
|
}
|
||||||
|
},
|
||||||
|
"ipv6": {
|
||||||
|
"unicast": {
|
||||||
|
"advertise_networks": [{"network": NETWORK["ipv6"]}]
|
||||||
|
}
|
||||||
|
},
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
logger.info(
|
||||||
|
"Advertising networks %s %s from router %s",
|
||||||
|
NETWORK["ipv4"],
|
||||||
|
NETWORK["ipv6"],
|
||||||
|
dut,
|
||||||
|
)
|
||||||
|
result = create_router_bgp(tgen, topo, input_dict_nw)
|
||||||
|
assert result is True, "Testcase {} : Failed \n Error: {}".format(
|
||||||
|
tc_name, result
|
||||||
|
)
|
||||||
|
|
||||||
|
|
||||||
|
@pytest.mark.parametrize("test_type", ["redist_static"])
|
||||||
|
def test_ecmp_fast_convergence(request, test_type):
|
||||||
|
"""This test is to verify bgp fast-convergence cli functionality"""
|
||||||
|
|
||||||
|
tc_name = request.node.name
|
||||||
|
write_test_header(tc_name)
|
||||||
|
tgen = get_topogen()
|
||||||
|
|
||||||
|
# Verifying RIB routes
|
||||||
|
dut = "r3"
|
||||||
|
protocol = "bgp"
|
||||||
|
|
||||||
|
reset_config_on_routers(tgen)
|
||||||
|
static_or_nw(tgen, topo, tc_name, test_type, "r2")
|
||||||
|
|
||||||
|
for addr_type in ADDR_TYPES:
|
||||||
|
input_dict = {"r3": {"static_routes": [{"network": NETWORK[addr_type]}]}}
|
||||||
|
|
||||||
|
logger.info("Verifying %s routes on r3", addr_type)
|
||||||
|
result = verify_rib(
|
||||||
|
tgen,
|
||||||
|
addr_type,
|
||||||
|
dut,
|
||||||
|
input_dict,
|
||||||
|
protocol=protocol,
|
||||||
|
)
|
||||||
|
assert result is True, "Testcase {} : Failed \n Error: {}".format(
|
||||||
|
tc_name, result
|
||||||
|
)
|
||||||
|
|
||||||
|
intf1 = topo["routers"]["r2"]["links"]["r3-link1"]["interface"]
|
||||||
|
intf2 = topo["routers"]["r2"]["links"]["r3-link2"]["interface"]
|
||||||
|
|
||||||
|
logger.info("Shutdown one of the link b/w r2 and r3")
|
||||||
|
shutdown_bringup_interface(tgen, "r2", intf1, False)
|
||||||
|
|
||||||
|
logger.info("Verify bgp neighbors are still up")
|
||||||
|
result = verify_bgp_convergence(tgen, topo)
|
||||||
|
assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
|
||||||
|
|
||||||
|
logger.info("Shutdown another link b/w r2 and r3")
|
||||||
|
shutdown_bringup_interface(tgen, "r2", intf2, False)
|
||||||
|
|
||||||
|
logger.info("Wait for 10 sec and make sure bgp neighbors are still up")
|
||||||
|
sleep(10)
|
||||||
|
result = verify_bgp_convergence(tgen, topo)
|
||||||
|
assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
|
||||||
|
|
||||||
|
logger.info("No shut links b/w r2 and r3")
|
||||||
|
shutdown_bringup_interface(tgen, "r2", intf1, True)
|
||||||
|
shutdown_bringup_interface(tgen, "r2", intf2, True)
|
||||||
|
|
||||||
|
logger.info("Enable bgp fast-convergence cli")
|
||||||
|
raw_config = {
|
||||||
|
"r2": {
|
||||||
|
"raw_config": [
|
||||||
|
"router bgp {}".format(topo["routers"]["r2"]["bgp"]["local_as"]),
|
||||||
|
"bgp fast-convergence",
|
||||||
|
]
|
||||||
|
}
|
||||||
|
}
|
||||||
|
result = apply_raw_config(tgen, raw_config)
|
||||||
|
assert result is True, "Testcase {} : Failed Error: {}".format(tc_name, result)
|
||||||
|
|
||||||
|
logger.info("Shutdown one link b/w r2 and r3")
|
||||||
|
shutdown_bringup_interface(tgen, "r2", intf1, False)
|
||||||
|
|
||||||
|
logger.info("Verify bgp neighbors goes down immediately")
|
||||||
|
result = verify_bgp_convergence(tgen, topo, dut="r2", expected=False)
|
||||||
|
assert result is not True, "Testcase {} : Failed \n Error: {}".format(
|
||||||
|
tc_name, result
|
||||||
|
)
|
||||||
|
|
||||||
|
logger.info("Shutdown second link b/w r2 and r3")
|
||||||
|
shutdown_bringup_interface(tgen, "r2", intf2, False)
|
||||||
|
|
||||||
|
logger.info("Verify bgp neighbors goes down immediately")
|
||||||
|
result = verify_bgp_convergence(tgen, topo, dut="r2", expected=False)
|
||||||
|
assert result is not True, "Testcase {} : Failed \n Error: {}".format(
|
||||||
|
tc_name, result
|
||||||
|
)
|
||||||
|
|
||||||
|
write_test_footer(tc_name)
|
||||||
|
|
||||||
|
|
||||||
|
if __name__ == "__main__":
|
||||||
|
args = ["-s"] + sys.argv[1:]
|
||||||
|
sys.exit(pytest.main(args))
|
||||||
Loading…
Reference in New Issue
Block a user