mirror of
https://git.proxmox.com/git/mirror_frr
synced 2025-04-29 15:51:32 +00:00
bgpd: conditional advertisement - with route-map filter
Sample configuration along with route-map filter
------------------------------------------------
Router2# show running-config
Building configuration...
Current configuration:
!
frr version 7.6-dev-MyOwnFRRVersion
frr defaults traditional
hostname router
log file /var/log/frr/bgpd.log
log syslog informational
hostname Router2
service integrated-vtysh-config
!
debug bgp updates in
debug bgp updates out
!
debug route-map
!
ip route 200.200.0.0/16 blackhole
ipv6 route 2001:db8::200/128 blackhole
!
interface enp0s9
ip address 10.10.10.2/24
!
interface enp0s10
ip address 10.10.20.2/24
!
interface lo
ip address 2.2.2.2/24
ipv6 address 2001:db8::2/128
!
router bgp 2
bgp log-neighbor-changes
no bgp ebgp-requires-policy
neighbor 10.10.10.1 remote-as 1
neighbor 10.10.20.3 remote-as 3
!
address-family ipv4 unicast
network 2.2.2.0/24
network 200.200.0.0/16
neighbor 10.10.10.1 soft-reconfiguration inbound
neighbor 10.10.10.1 route-map RMAP_PERMIT_100 out
neighbor 10.10.10.1 advertise-map ADVERTISE non-exist-map CONDITION
neighbor 10.10.20.3 soft-reconfiguration inbound
exit-address-family
!
address-family ipv6 unicast
network 2001:db8::2/128
network 2001:db8::200/128
neighbor 10.10.10.1 activate
neighbor 10.10.10.1 soft-reconfiguration inbound
neighbor 10.10.10.1 route-map CONDITION_6 out
neighbor 10.10.10.1 advertise-map ADVERTISE_6 non-exist-map CONDITION_6
neighbor 10.10.20.3 activate
neighbor 10.10.20.3 soft-reconfiguration inbound
exit-address-family
!
access-list CONDITION seq 5 permit 3.3.3.0/24
access-list ADVERTISE seq 6 permit 200.200.0.0/16
access-list ADVERTISE seq 7 permit 20.20.0.0/16
access-list ADVERTISE seq 5 permit 2.2.2.0/24
access-list RMAP_PERMIT_100 seq 4 permit 100.100.0.0/16
!
ipv6 access-list ADVERTISE_6 seq 5 permit 2001:db8::2/128
ipv6 access-list CONDITION_6 seq 5 permit 2001:db8::3/128
!
route-map ADVERTISE permit 10
match ip address ADVERTISE
!
route-map CONDITION permit 10
match ip address CONDITION
!
route-map ADVERTISE_6 permit 10
match ipv6 address ADVERTISE_6
!
route-map CONDITION_6 permit 10
match ipv6 address CONDITION_6
!
route-map RMAP_PERMIT_100 permit 10
match ip address RMAP_PERMIT_100
!
line vty
!
end
Sample output when non-exist-map prefixes present in BGP table
--------------------------------------------------------------
Router2# show ip bgp all wide
For address family: IPv4 Unicast
BGP table version is 5, local router ID is 2.2.2.2, vrf id 0
Default local pref 100, local AS 2
Status codes: s suppressed, d damped, h history, * valid, > best, = multipath,
i internal, r RIB-failure, S Stale, R Removed
Nexthop codes: @NNN nexthop's vrf id, < announce-nh-self
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
*> 1.1.1.0/24 10.10.10.1 0 0 1 i
*> 2.2.2.0/24 0.0.0.0 0 32768 i
*> 3.3.3.0/24 10.10.20.3 0 0 3 i
*> 100.100.0.0/16 10.10.20.3 0 0 3 i
*> 200.200.0.0/16 0.0.0.0 0 32768 i
Displayed 5 routes and 5 total paths
For address family: IPv6 Unicast
BGP table version is 4, local router ID is 2.2.2.2, vrf id 0
Default local pref 100, local AS 2
Status codes: s suppressed, d damped, h history, * valid, > best, = multipath,
i internal, r RIB-failure, S Stale, R Removed
Nexthop codes: @NNN nexthop's vrf id, < announce-nh-self
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
*> 2001:db8::1/128 fe80::a00:27ff:fecb:ad57 0 0 1 i
*> 2001:db8::2/128 :: 0 32768 i
*> 2001:db8::3/128 fe80::a00:27ff:fe76:6738 0 0 3 i
*> 2001:db8::200/128 :: 0 32768 i
Displayed 4 routes and 4 total paths
Router2#
Router2#
Router2#
Router2#
Router2# show ip bgp all neighbors 10.10.10.1 advertised-routes wide
For address family: IPv4 Unicast
BGP table version is 5, local router ID is 2.2.2.2, vrf id 0
Default local pref 100, local AS 2
Status codes: s suppressed, d damped, h history, * valid, > best, = multipath,
i internal, r RIB-failure, S Stale, R Removed
Nexthop codes: @NNN nexthop's vrf id, < announce-nh-self
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
*> 100.100.0.0/16 0.0.0.0 0 3 i
Total number of prefixes 1
For address family: IPv6 Unicast
BGP table version is 4, local router ID is 2.2.2.2, vrf id 0
Default local pref 100, local AS 2
Status codes: s suppressed, d damped, h history, * valid, > best, = multipath,
i internal, r RIB-failure, S Stale, R Removed
Nexthop codes: @NNN nexthop's vrf id, < announce-nh-self
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
*> 2001:db8::3/128 :: 0 3 i
Total number of prefixes 1
Router2#
Sample output when non-exist-map prefixes not present in BGP table
------------------------------------------------------------------
Router2# show ip bgp all wide
For address family: IPv4 Unicast
BGP table version is 6, local router ID is 2.2.2.2, vrf id 0
Default local pref 100, local AS 2
Status codes: s suppressed, d damped, h history, * valid, > best, = multipath,
i internal, r RIB-failure, S Stale, R Removed
Nexthop codes: @NNN nexthop's vrf id, < announce-nh-self
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
*> 1.1.1.0/24 10.10.10.1 0 0 1 i
*> 2.2.2.0/24 0.0.0.0 0 32768 i
*> 100.100.0.0/16 10.10.20.3 0 0 3 i
*> 200.200.0.0/16 0.0.0.0 0 32768 i
Displayed 4 routes and 4 total paths
For address family: IPv6 Unicast
BGP table version is 5, local router ID is 2.2.2.2, vrf id 0
Default local pref 100, local AS 2
Status codes: s suppressed, d damped, h history, * valid, > best, = multipath,
i internal, r RIB-failure, S Stale, R Removed
Nexthop codes: @NNN nexthop's vrf id, < announce-nh-self
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
*> 2001:db8::1/128 fe80::a00:27ff:fecb:ad57 0 0 1 i
*> 2001:db8::2/128 :: 0 32768 i
*> 2001:db8::200/128 :: 0 32768 i
Displayed 3 routes and 3 total paths
Router2#
Router2# show ip bgp all neighbors 10.10.10.1 advertised-routes wide
For address family: IPv4 Unicast
BGP table version is 6, local router ID is 2.2.2.2, vrf id 0
Default local pref 100, local AS 2
Status codes: s suppressed, d damped, h history, * valid, > best, = multipath,
i internal, r RIB-failure, S Stale, R Removed
Nexthop codes: @NNN nexthop's vrf id, < announce-nh-self
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
*> 2.2.2.0/24 0.0.0.0 0 32768 i
*> 100.100.0.0/16 0.0.0.0 0 3 i
*> 200.200.0.0/16 0.0.0.0 0 32768 i
Total number of prefixes 3
For address family: IPv6 Unicast
BGP table version is 5, local router ID is 2.2.2.2, vrf id 0
Default local pref 100, local AS 2
Status codes: s suppressed, d damped, h history, * valid, > best, = multipath,
i internal, r RIB-failure, S Stale, R Removed
Nexthop codes: @NNN nexthop's vrf id, < announce-nh-self
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
*> 2001:db8::2/128 :: 0 32768 i
Total number of prefixes 1
Router2#
Signed-off-by: Madhuri Kuruganti <k.madhuri@samsung.com>
This commit is contained in:
Madhuri Kuruganti
parent
7f7940e6bf
commit
c5aec50b81
@ -232,7 +232,6 @@ static int bgp_conditional_adv_timer(struct thread *t)
|
||||
struct update_subgroup *subgrp = NULL;
|
||||
enum route_map_cmd_result_t ret, prev_ret;
|
||||
bool route_advertised = false;
|
||||
bool adv_withdrawn = false;
|
||||
int adv_conditional = 0;
|
||||
|
||||
bgp = THREAD_ARG(t);
|
||||
@ -278,7 +277,6 @@ static int bgp_conditional_adv_timer(struct thread *t)
|
||||
/* cmap (route-map attached to exist-map or
|
||||
* non-exist-map) map validation
|
||||
*/
|
||||
adv_withdrawn = false;
|
||||
adv_conditional = 0;
|
||||
|
||||
ret = bgp_check_rmap_prefixes_in_bgp_table(table,
|
||||
@ -288,41 +286,25 @@ static int bgp_conditional_adv_timer(struct thread *t)
|
||||
|
||||
switch (ret) {
|
||||
case RMAP_NOOP:
|
||||
if (prev_ret == RMAP_NOOP)
|
||||
if (prev_ret == RMAP_NOOP) {
|
||||
peer->advmap_info[afi][safi]
|
||||
.config_change = false;
|
||||
continue;
|
||||
|
||||
}
|
||||
peer->advmap_info[afi][safi].cmap_prev_status =
|
||||
ret;
|
||||
if (filter->advmap.status)
|
||||
continue;
|
||||
|
||||
/* advertise previously withdrawn routes */
|
||||
adv_withdrawn = true;
|
||||
break;
|
||||
|
||||
case RMAP_MATCH:
|
||||
/* Handle configuration changes */
|
||||
if (peer->advmap_info[afi][safi]
|
||||
.config_change) {
|
||||
/* If configuration(ACL filetr prefixes)
|
||||
* is changed and if the advertise-map
|
||||
* filter previous status was withdraw
|
||||
* then we need to advertise the
|
||||
* previously withdrawn routes.
|
||||
* Nothing to do if the filter status
|
||||
* was advertise.
|
||||
*/
|
||||
if ((prev_ret != RMAP_NOOP)
|
||||
&& !filter->advmap.status)
|
||||
adv_withdrawn = true;
|
||||
|
||||
adv_conditional =
|
||||
(filter->advmap.condition
|
||||
== CONDITION_EXIST)
|
||||
? NLRI
|
||||
: WITHDRAW;
|
||||
peer->advmap_info[afi][safi]
|
||||
.config_change = false;
|
||||
} else {
|
||||
if (prev_ret != RMAP_MATCH)
|
||||
adv_conditional =
|
||||
@ -340,25 +322,11 @@ static int bgp_conditional_adv_timer(struct thread *t)
|
||||
/* Handle configuration changes */
|
||||
if (peer->advmap_info[afi][safi]
|
||||
.config_change) {
|
||||
/* If configuration(ACL filetr prefixes)
|
||||
* is changed and if the advertise-map
|
||||
* filter previous status was withdraw
|
||||
* then we need to advertise the
|
||||
* previously withdrawn routes.
|
||||
* Nothing to do if the filter status
|
||||
* was advertise.
|
||||
*/
|
||||
if ((prev_ret != RMAP_NOOP)
|
||||
&& !filter->advmap.status)
|
||||
adv_withdrawn = true;
|
||||
|
||||
adv_conditional =
|
||||
(filter->advmap.condition
|
||||
== CONDITION_EXIST)
|
||||
? WITHDRAW
|
||||
: NLRI;
|
||||
peer->advmap_info[afi][safi]
|
||||
.config_change = false;
|
||||
} else {
|
||||
if (prev_ret != RMAP_NOMATCH)
|
||||
adv_conditional =
|
||||
@ -383,18 +351,9 @@ static int bgp_conditional_adv_timer(struct thread *t)
|
||||
*/
|
||||
ret = is_rmap_valid(filter->advmap.amap) ? RMAP_MATCH
|
||||
: RMAP_NOOP;
|
||||
prev_ret =
|
||||
peer->advmap_info[afi][safi].amap_prev_status;
|
||||
|
||||
if (ret == RMAP_NOOP) {
|
||||
if (prev_ret == RMAP_NOOP) {
|
||||
if (!adv_withdrawn)
|
||||
continue;
|
||||
/* Should not reach here. */
|
||||
}
|
||||
if (filter->advmap.status && !adv_withdrawn)
|
||||
continue;
|
||||
}
|
||||
if ((ret == RMAP_NOOP) && (prev_ret == RMAP_NOOP))
|
||||
continue;
|
||||
|
||||
/* Derive conditional advertisement status from
|
||||
* condition and return value of condition-map
|
||||
@ -411,7 +370,11 @@ static int bgp_conditional_adv_timer(struct thread *t)
|
||||
*/
|
||||
}
|
||||
|
||||
if (adv_withdrawn) {
|
||||
/* Send regular update as per the existing policy.
|
||||
* There is a change in route-map, match-rule, ACLs,
|
||||
* or route-map filter configuration on the same peer.
|
||||
*/
|
||||
if (peer->advmap_info[afi][safi].config_change) {
|
||||
paf = peer_af_find(peer, afi, safi);
|
||||
if (paf) {
|
||||
update_subgroup_split_peer(paf, NULL);
|
||||
@ -420,7 +383,11 @@ static int bgp_conditional_adv_timer(struct thread *t)
|
||||
subgroup_announce_table(
|
||||
paf->subgroup, NULL);
|
||||
}
|
||||
peer->advmap_info[afi][safi].config_change =
|
||||
false;
|
||||
}
|
||||
|
||||
/* Send update as per the conditional advertisement */
|
||||
if (adv_conditional) {
|
||||
route_advertised = bgp_conditional_adv_routes(
|
||||
peer, afi, safi, table,
|
||||
|
||||
@ -4361,6 +4361,10 @@ static int bgp_announce_route_timer_expired(struct thread *t)
|
||||
return 0;
|
||||
|
||||
peer_af_announce_route(paf, 1);
|
||||
|
||||
/* Notify BGP conditional advertisement scanner percess */
|
||||
peer->advmap_info[paf->afi][paf->safi].config_change = true;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
@ -3698,18 +3698,19 @@ static void bgp_route_map_process_peer(const char *rmap_name,
|
||||
if (filter->advmap.aname
|
||||
&& (strcmp(rmap_name, filter->advmap.aname) == 0)) {
|
||||
filter->advmap.amap = map;
|
||||
peer->advmap_info[afi][safi].config_change = true;
|
||||
}
|
||||
|
||||
if (filter->advmap.cname
|
||||
&& (strcmp(rmap_name, filter->advmap.cname) == 0)) {
|
||||
filter->advmap.cmap = map;
|
||||
peer->advmap_info[afi][safi].config_change = true;
|
||||
}
|
||||
|
||||
if (peer->default_rmap[afi][safi].name
|
||||
&& (strcmp(rmap_name, peer->default_rmap[afi][safi].name) == 0))
|
||||
peer->default_rmap[afi][safi].map = map;
|
||||
|
||||
/* Notify BGP conditional advertisement scanner percess */
|
||||
peer->advmap_info[afi][safi].config_change = true;
|
||||
}
|
||||
|
||||
static void bgp_route_map_update_peer_group(const char *rmap_name,
|
||||
|
||||
Loading…
Reference in New Issue
Block a user