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BGP: Implement "neighbor x.x.x.x addpath-tx-bestpath-per-AS"

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Signed-off-by: Daniel Walton <dwalton@cumulusnetworks.com>
Reviewed-by:   Donald Sharp <sharpd@cumulusnetworks.com>

Ticket: CM-8114
This commit is contained in:
Daniel Walton 2015-11-06 16:34:41 +00:00
parent 06830cb85f
commit 06370dacc0
10 changed files with 262 additions and 81 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
bgpd/bgp_aspath.c
View File

@ -1147,6 +1147,15 @@ aspath_firstas_check (struct aspath *aspath, as_t asno)
return 0;
}
int
aspath_get_firstas (struct aspath *aspath)
{
if (aspath == NULL || aspath->segments == NULL)
return 0;
return aspath->segments->as[0];
}
/* AS path loop check. If aspath contains asno then return >= 1. */
int
aspath_loop_check (struct aspath *aspath, as_t asno)

1
bgpd/bgp_aspath.h
View File

@ -100,6 +100,7 @@ extern const char *aspath_print (struct aspath *);
extern void aspath_print_vty (struct vty *, const char *, struct aspath *, const char *);
extern void aspath_print_all_vty (struct vty *);
extern unsigned int aspath_key_make (void *);
extern int aspath_get_firstas (struct aspath *);
extern int aspath_loop_check (struct aspath *, as_t);
extern int aspath_private_as_check (struct aspath *);
extern int aspath_single_asn_check (struct aspath *, as_t asn);

3
bgpd/bgp_open.c
View File

@ -1316,7 +1316,8 @@ bgp_open_capability (struct stream *s, struct peer *peer)
/* Only advertise addpath TX if a feature that will use it is
* configured */
if (CHECK_FLAG(peer->af_flags[afi][safi], PEER_FLAG_ADDPATH_TX_ALL_PATHS))
if (CHECK_FLAG(peer->af_flags[afi][safi], PEER_FLAG_ADDPATH_TX_ALL_PATHS) ||
CHECK_FLAG(peer->af_flags[afi][safi], PEER_FLAG_ADDPATH_TX_BESTPATH_PER_AS))
adv_addpath_tx = 1;
}

134
bgpd/bgp_route.c
View File

@ -1235,6 +1235,16 @@ subgroup_announce_check (struct bgp_info *ri, struct update_subgroup *subgrp,
return 0;
}
/* If this is not the bestpath then check to see if there is an enabled addpath
* feature that requires us to advertise it */
if (! CHECK_FLAG (ri->flags, BGP_INFO_SELECTED))
{
if (! bgp_addpath_tx_path(peer, afi, safi, ri))
{
return 0;
}
}
/* Aggregate-address suppress check. */
if (ri->extra && ri->extra->suppress)
if (! UNSUPPRESS_MAP_NAME (filter))
@ -1782,50 +1792,64 @@ bgp_best_selection (struct bgp *bgp, struct bgp_node *rn,
/* bgp deterministic-med */
new_select = NULL;
if (bgp_flag_check (bgp, BGP_FLAG_DETERMINISTIC_MED))
for (ri1 = rn->info; ri1; ri1 = ri1->next)
{
if (CHECK_FLAG (ri1->flags, BGP_INFO_DMED_CHECK))
continue;
if (BGP_INFO_HOLDDOWN (ri1))
continue;
if (ri1->peer && ri1->peer != bgp->peer_self)
if (ri1->peer->status != Established)
{
/* Clear BGP_INFO_DMED_SELECTED for all paths */
for (ri1 = rn->info; ri1; ri1 = ri1->next)
bgp_info_unset_flag (rn, ri1, BGP_INFO_DMED_SELECTED);
for (ri1 = rn->info; ri1; ri1 = ri1->next)
{
if (CHECK_FLAG (ri1->flags, BGP_INFO_DMED_CHECK))
continue;
if (BGP_INFO_HOLDDOWN (ri1))
continue;
if (ri1->peer && ri1->peer != bgp->peer_self)
if (ri1->peer->status != Established)
continue;
new_select = ri1;
old_select = CHECK_FLAG (ri1->flags, BGP_INFO_SELECTED) ? ri1 : NULL;
if (ri1->next)
for (ri2 = ri1->next; ri2; ri2 = ri2->next)
{
if (CHECK_FLAG (ri2->flags, BGP_INFO_DMED_CHECK))
continue;
if (BGP_INFO_HOLDDOWN (ri2))
continue;
if (ri2->peer &&
ri2->peer != bgp->peer_self &&
!CHECK_FLAG (ri2->peer->sflags, PEER_STATUS_NSF_WAIT))
if (ri2->peer->status != Established)
continue;
new_select = ri1;
old_select = CHECK_FLAG (ri1->flags, BGP_INFO_SELECTED) ? ri1 : NULL;
if (ri1->next)
{
for (ri2 = ri1->next; ri2; ri2 = ri2->next)
{
if (CHECK_FLAG (ri2->flags, BGP_INFO_DMED_CHECK))
continue;
if (BGP_INFO_HOLDDOWN (ri2))
continue;
if (ri2->peer &&
ri2->peer != bgp->peer_self &&
!CHECK_FLAG (ri2->peer->sflags, PEER_STATUS_NSF_WAIT))
if (ri2->peer->status != Established)
continue;
if (aspath_cmp_left (ri1->attr->aspath, ri2->attr->aspath)
|| aspath_cmp_left_confed (ri1->attr->aspath,
ri2->attr->aspath))
{
if (CHECK_FLAG (ri2->flags, BGP_INFO_SELECTED))
old_select = ri2;
if (bgp_info_cmp (bgp, ri2, new_select, &paths_eq,
mpath_cfg, debug, pfx_buf))
{
bgp_info_unset_flag (rn, new_select, BGP_INFO_DMED_SELECTED);
new_select = ri2;
}
if (aspath_cmp_left (ri1->attr->aspath, ri2->attr->aspath)
|| aspath_cmp_left_confed (ri1->attr->aspath,
ri2->attr->aspath))
{
if (CHECK_FLAG (ri2->flags, BGP_INFO_SELECTED))
old_select = ri2;
if (bgp_info_cmp (bgp, ri2, new_select, &paths_eq,
mpath_cfg, debug, pfx_buf))
{
bgp_info_unset_flag (rn, new_select, BGP_INFO_DMED_SELECTED);
new_select = ri2;
}
bgp_info_set_flag (rn, ri2, BGP_INFO_DMED_CHECK);
}
}
bgp_info_set_flag (rn, new_select, BGP_INFO_DMED_CHECK);
bgp_info_set_flag (rn, new_select, BGP_INFO_DMED_SELECTED);
}
bgp_info_set_flag (rn, ri2, BGP_INFO_DMED_CHECK);
}
}
}
bgp_info_set_flag (rn, new_select, BGP_INFO_DMED_CHECK);
bgp_info_set_flag (rn, new_select, BGP_INFO_DMED_SELECTED);
if (debug)
zlog_debug("%s: path %s is the bestpath from AS %d",
pfx_buf, new_select->peer->host,
aspath_get_firstas(new_select->attr->aspath));
}
}
/* Check old selected route and new selected route. */
old_select = NULL;
@ -1859,8 +1883,8 @@ bgp_best_selection (struct bgp *bgp, struct bgp_node *rn,
bgp_info_unset_flag (rn, ri, BGP_INFO_DMED_CHECK);
continue;
}
bgp_info_unset_flag (rn, ri, BGP_INFO_DMED_CHECK);
bgp_info_unset_flag (rn, ri, BGP_INFO_DMED_SELECTED);
if (bgp_info_cmp (bgp, ri, new_select, &paths_eq, mpath_cfg, debug, pfx_buf))
{
@ -7311,6 +7335,7 @@ route_vty_out_detail (struct vty *vty, struct bgp *bgp, struct prefix *p,
struct peer *peer;
int addpath_capable;
int has_adj;
int first_as;
if (json_paths)
{
@ -7733,18 +7758,41 @@ route_vty_out_detail (struct vty *vty, struct bgp *bgp, struct prefix *p,
vty_out (vty, ", multipath");
}
// Mark the bestpath(s)
if (CHECK_FLAG (binfo->flags, BGP_INFO_DMED_SELECTED))
{
first_as = aspath_get_firstas(attr->aspath);
if (json_paths)
{
if (!json_bestpath)
json_bestpath = json_object_new_object();
json_object_int_add(json_bestpath, "bestpathFromAs", first_as);
}
else
{
if (first_as)
vty_out (vty, ", bestpath-from-AS %d", first_as);
else
vty_out (vty, ", bestpath-from-AS Local");
}
}
if (CHECK_FLAG (binfo->flags, BGP_INFO_SELECTED))
{
if (json_paths)
{
json_bestpath = json_object_new_object();
if (!json_bestpath)
json_bestpath = json_object_new_object();
json_object_boolean_true_add(json_bestpath, "overall");
json_object_object_add(json_path, "bestpath", json_bestpath);
}
else
vty_out (vty, ", best");
}
if (json_bestpath)
json_object_object_add(json_path, "bestpath", json_bestpath);
if (!json_paths)
vty_out (vty, "%s", VTY_NEWLINE);

19
bgpd/bgp_updgrp.c
View File

@ -1955,9 +1955,28 @@ update_group_clear_update_dbg (struct update_group *updgrp, void *arg)
return UPDWALK_CONTINUE;
}
/* Return true if we should addpath encode NLRI to this peer */
int
bgp_addpath_encode_tx (struct peer *peer, afi_t afi, safi_t safi)
{
return (CHECK_FLAG (peer->af_cap[afi][safi], PEER_CAP_ADDPATH_AF_TX_ADV) &&
CHECK_FLAG (peer->af_cap[afi][safi], PEER_CAP_ADDPATH_AF_RX_RCV));
}
/*
* Return true if this is a path we should advertise due to a
* configured addpath-tx knob
*/
int
bgp_addpath_tx_path (struct peer *peer, afi_t afi, safi_t safi,
struct bgp_info *ri)
{
if (CHECK_FLAG (peer->af_flags[afi][safi], PEER_FLAG_ADDPATH_TX_ALL_PATHS))
return 1;
if (CHECK_FLAG (peer->af_flags[afi][safi], PEER_FLAG_ADDPATH_TX_BESTPATH_PER_AS) &&
CHECK_FLAG (ri->flags, BGP_INFO_DMED_SELECTED))
return 1;
return 0;
}

3
bgpd/bgp_updgrp.h
View File

@ -50,6 +50,7 @@
PEER_FLAG_REMOVE_PRIVATE_AS_REPLACE | \
PEER_FLAG_REMOVE_PRIVATE_AS_ALL_REPLACE | \
PEER_FLAG_ADDPATH_TX_ALL_PATHS | \
PEER_FLAG_ADDPATH_TX_BESTPATH_PER_AS | \
PEER_FLAG_AS_OVERRIDE)
#define PEER_UPDGRP_CAP_FLAGS (PEER_CAP_AS4_RCV)
@ -480,6 +481,8 @@ update_group_clear_update_dbg (struct update_group *updgrp, void *arg);
extern void update_bgp_group_free(struct bgp *bgp);
extern int bgp_addpath_encode_tx (struct peer *peer, afi_t afi, safi_t safi);
extern int bgp_addpath_tx_path (struct peer *peer, afi_t afi, safi_t safi,
struct bgp_info *ri);
/*
* Inline functions

18
bgpd/bgp_updgrp_adv.c
View File

@ -155,16 +155,17 @@ group_announce_route_walkcb (struct update_group *updgrp, void *arg)
}
}
if (CHECK_FLAG(peer->af_flags[afi][safi], PEER_FLAG_ADDPATH_TX_ALL_PATHS))
for (ri = ctx->rn->info; ri; ri = ri->next)
{
for (ri = ctx->rn->info; ri; ri = ri->next)
{
if (ri == ctx->ri)
continue;
subgroup_process_announce_selected (subgrp, ri, ctx->rn, ri->addpath_tx_id);
}
/* Skip the bestpath for now */
if (ri == ctx->ri)
continue;
subgroup_process_announce_selected (subgrp, ri, ctx->rn, ri->addpath_tx_id);
}
/* Process the bestpath last so the "show ip bgp neighbor x.x.x.x advertised"
* output shows the attributes from the bestpath */
if (ctx->ri)
subgroup_process_announce_selected (subgrp, ctx->ri, ctx->rn, ctx->ri->addpath_tx_id);
}
@ -613,8 +614,7 @@ subgroup_announce_table (struct update_subgroup *subgrp,
for (ri = rn->info; ri; ri = ri->next)
if (CHECK_FLAG (ri->flags, BGP_INFO_SELECTED) ||
(addpath_capable &&
CHECK_FLAG(peer->af_flags[afi][safi], PEER_FLAG_ADDPATH_TX_ALL_PATHS)))
(addpath_capable && bgp_addpath_tx_path(peer, afi, safi, ri)))
{
if (!rsclient
&& subgroup_announce_check (ri, subgrp, &rn->p, &attr))

108
bgpd/bgp_vty.c
View File

@ -289,28 +289,6 @@ enum clear_sort
clear_as
};
/* Force a bestpath recalculation for all prefixes. This is used
* when 'bgp bestpath' commands are entered.
*/
static void
bgp_recalculate_all_bestpaths (struct bgp *bgp)
{
afi_t afi;
safi_t safi;
struct bgp_node *rn;
for (afi = AFI_IP; afi < AFI_MAX; afi++)
{
for (safi = SAFI_UNICAST; safi < SAFI_MAX; safi++)
{
for (rn = bgp_table_top (bgp->rib[afi][safi]); rn; rn = bgp_route_next (rn))
{
bgp_process (bgp, rn, afi, safi);
}
}
}
}
static void
bgp_clear_vty_error (struct vty *vty, struct peer *peer, afi_t afi,
safi_t safi, int error)
@ -1655,13 +1633,43 @@ DEFUN (no_bgp_deterministic_med,
"Pick the best-MED path among paths advertised from the neighboring AS\n")
{
struct bgp *bgp;
int bestpath_per_as_used;
afi_t afi;
safi_t safi;
struct peer *peer;
struct listnode *node, *nnode;
bgp = vty->index;
if (bgp_flag_check(bgp, BGP_FLAG_DETERMINISTIC_MED))
{
bgp_flag_unset (bgp, BGP_FLAG_DETERMINISTIC_MED);
bgp_recalculate_all_bestpaths (bgp);
bestpath_per_as_used = 0;
for (ALL_LIST_ELEMENTS (bgp->peer, node, nnode, peer))
{
for (afi = AFI_IP; afi < AFI_MAX; afi++)
for (safi = SAFI_UNICAST; safi < SAFI_MAX; safi++)
if (CHECK_FLAG (peer->af_flags[afi][safi], PEER_FLAG_ADDPATH_TX_BESTPATH_PER_AS))
{
bestpath_per_as_used = 1;
break;
}
if (bestpath_per_as_used)
break;
}
if (bestpath_per_as_used)
{
vty_out (vty, "bgp deterministic-med cannot be disabled while addpath-tx-bestpath-per-AS is in use%s",
VTY_NEWLINE);
return CMD_WARNING;
}
else
{
bgp_flag_unset (bgp, BGP_FLAG_DETERMINISTIC_MED);
bgp_recalculate_all_bestpaths (bgp);
}
}
return CMD_SUCCESS;
@ -5803,6 +5811,38 @@ DEFUN (no_neighbor_addpath_tx_all_paths,
PEER_FLAG_ADDPATH_TX_ALL_PATHS);
}
DEFUN (neighbor_addpath_tx_bestpath_per_as,
neighbor_addpath_tx_bestpath_per_as_cmd,
NEIGHBOR_CMD2 "addpath-tx-bestpath-per-AS",
NEIGHBOR_STR
NEIGHBOR_ADDR_STR2
"Use addpath to advertise the bestpath per each neighboring AS\n")
{
struct peer *peer;
peer = peer_and_group_lookup_vty (vty, argv[0]);
if (! peer)
return CMD_WARNING;
return peer_af_flag_set_vty (vty, argv[0], bgp_node_afi (vty),
bgp_node_safi (vty),
PEER_FLAG_ADDPATH_TX_BESTPATH_PER_AS);
}
DEFUN (no_neighbor_addpath_tx_bestpath_per_as,
no_neighbor_addpath_tx_bestpath_per_as_cmd,
NO_NEIGHBOR_CMD2 "addpath-tx-bestpath-per-AS",
NO_STR
NEIGHBOR_STR
NEIGHBOR_ADDR_STR2
"Use addpath to advertise the bestpath per each neighboring AS\n")
{
return peer_af_flag_unset_vty (vty, argv[0], bgp_node_afi (vty),
bgp_node_safi (vty),
PEER_FLAG_ADDPATH_TX_BESTPATH_PER_AS);
}
/* Address family configuration. */
DEFUN (address_family_ipv4,
address_family_ipv4_cmd,
@ -9282,6 +9322,9 @@ bgp_show_peer_afi (struct vty *vty, struct peer *p, afi_t afi, safi_t safi,
if (CHECK_FLAG (p->af_flags[afi][safi], PEER_FLAG_ADDPATH_TX_ALL_PATHS))
json_object_boolean_true_add(json_addr, "addpathTxAllPaths");
if (CHECK_FLAG (p->af_flags[afi][safi], PEER_FLAG_ADDPATH_TX_BESTPATH_PER_AS))
json_object_boolean_true_add(json_addr, "addpathTxBestpathPerAS");
if (CHECK_FLAG (p->af_flags[afi][safi], PEER_FLAG_AS_OVERRIDE))
json_object_string_add(json_addr, "overrideASNsInOutboundUpdates", "ifAspathEqualRemoteAs");
@ -9472,6 +9515,9 @@ bgp_show_peer_afi (struct vty *vty, struct peer *p, afi_t afi, safi_t safi,
if (CHECK_FLAG (p->af_flags[afi][safi], PEER_FLAG_ADDPATH_TX_ALL_PATHS))
vty_out (vty, " Advertise all paths via addpath%s", VTY_NEWLINE);
if (CHECK_FLAG (p->af_flags[afi][safi], PEER_FLAG_ADDPATH_TX_BESTPATH_PER_AS))
vty_out (vty, " Advertise bestpath per AS via addpath%s", VTY_NEWLINE);
if (CHECK_FLAG (p->af_flags[afi][safi], PEER_FLAG_AS_OVERRIDE))
vty_out (vty, " Override ASNs in outbound updates if aspath equals remote-as%s", VTY_NEWLINE);
@ -13223,6 +13269,20 @@ bgp_vty_init (void)
install_element (BGP_VPNV4_NODE, &neighbor_addpath_tx_all_paths_cmd);
install_element (BGP_VPNV4_NODE, &no_neighbor_addpath_tx_all_paths_cmd);
/* "neighbor addpath-tx-bestpath-per-AS" commands.*/
install_element (BGP_NODE, &neighbor_addpath_tx_bestpath_per_as_cmd);
install_element (BGP_NODE, &no_neighbor_addpath_tx_bestpath_per_as_cmd);
install_element (BGP_IPV4_NODE, &neighbor_addpath_tx_bestpath_per_as_cmd);
install_element (BGP_IPV4_NODE, &no_neighbor_addpath_tx_bestpath_per_as_cmd);
install_element (BGP_IPV4M_NODE, &neighbor_addpath_tx_bestpath_per_as_cmd);
install_element (BGP_IPV4M_NODE, &no_neighbor_addpath_tx_bestpath_per_as_cmd);
install_element (BGP_IPV6_NODE, &neighbor_addpath_tx_bestpath_per_as_cmd);
install_element (BGP_IPV6_NODE, &no_neighbor_addpath_tx_bestpath_per_as_cmd);
install_element (BGP_IPV6M_NODE, &neighbor_addpath_tx_bestpath_per_as_cmd);
install_element (BGP_IPV6M_NODE, &no_neighbor_addpath_tx_bestpath_per_as_cmd);
install_element (BGP_VPNV4_NODE, &neighbor_addpath_tx_bestpath_per_as_cmd);
install_element (BGP_VPNV4_NODE, &no_neighbor_addpath_tx_bestpath_per_as_cmd);
/* "neighbor passive" commands. */
install_element (BGP_NODE, &neighbor_passive_cmd);
install_element (BGP_NODE, &no_neighbor_passive_cmd);

46
bgpd/bgpd.c
View File

@ -1362,6 +1362,28 @@ bgp_peer_conf_if_to_su_update (struct peer *peer)
hash_get(peer->bgp->peerhash, peer, hash_alloc_intern);
}
/* Force a bestpath recalculation for all prefixes. This is used
* when 'bgp bestpath' commands are entered.
*/
void
bgp_recalculate_all_bestpaths (struct bgp *bgp)
{
afi_t afi;
safi_t safi;
struct bgp_node *rn;
for (afi = AFI_IP; afi < AFI_MAX; afi++)
{
for (safi = SAFI_UNICAST; safi < SAFI_MAX; safi++)
{
for (rn = bgp_table_top (bgp->rib[afi][safi]); rn; rn = bgp_route_next (rn))
{
bgp_process (bgp, rn, afi, safi);
}
}
}
}
/* Create new BGP peer. */
struct peer *
peer_create (union sockunion *su, const char *conf_if, struct bgp *bgp,
@ -3484,6 +3506,7 @@ static const struct peer_flag_action peer_af_flag_action_list[] =
{ PEER_FLAG_AS_OVERRIDE, 1, peer_change_reset_out },
{ PEER_FLAG_REMOVE_PRIVATE_AS_ALL_REPLACE,1, peer_change_reset_out },
{ PEER_FLAG_ADDPATH_TX_ALL_PATHS, 1, peer_change_reset },
{ PEER_FLAG_ADDPATH_TX_BESTPATH_PER_AS, 1, peer_change_reset },
{ 0, 0, 0 }
};
@ -3792,7 +3815,7 @@ peer_af_flag_modify (struct peer *peer, afi_t afi, safi_t safi, u_int32_t flag,
}
/* Track if addpath TX is in use */
if (flag & PEER_FLAG_ADDPATH_TX_ALL_PATHS)
if (flag & (PEER_FLAG_ADDPATH_TX_ALL_PATHS|PEER_FLAG_ADDPATH_TX_BESTPATH_PER_AS))
{
bgp = peer->bgp;
addpath_tx_used = 0;
@ -3800,12 +3823,25 @@ peer_af_flag_modify (struct peer *peer, afi_t afi, safi_t safi, u_int32_t flag,
if (set)
{
addpath_tx_used = 1;
if (flag & PEER_FLAG_ADDPATH_TX_BESTPATH_PER_AS)
{
if (!bgp_flag_check (bgp, BGP_FLAG_DETERMINISTIC_MED))
{
zlog_warn("%s: enabling bgp deterministic-med, this is required"\
" for addpath-tx-bestpath-per-AS",
peer->host);
bgp_flag_set (bgp, BGP_FLAG_DETERMINISTIC_MED);
bgp_recalculate_all_bestpaths (bgp);
}
}
}
else
{
for (ALL_LIST_ELEMENTS (bgp->peer, node, nnode, tmp_peer))
{
if (CHECK_FLAG (tmp_peer->af_flags[afi][safi], PEER_FLAG_ADDPATH_TX_ALL_PATHS))
if (CHECK_FLAG (tmp_peer->af_flags[afi][safi], PEER_FLAG_ADDPATH_TX_ALL_PATHS) ||
CHECK_FLAG (tmp_peer->af_flags[afi][safi], PEER_FLAG_ADDPATH_TX_BESTPATH_PER_AS))
{
addpath_tx_used = 1;
break;
@ -6551,8 +6587,10 @@ bgp_config_write_peer_af (struct vty *vty, struct bgp *bgp,
/* addpath TX knobs */
if (peergroup_af_flag_check (peer, afi, safi, PEER_FLAG_ADDPATH_TX_ALL_PATHS))
vty_out (vty, " neighbor %s addpath-tx-all-paths%s", addr,
VTY_NEWLINE);
vty_out (vty, " neighbor %s addpath-tx-all-paths%s", addr, VTY_NEWLINE);
if (peergroup_af_flag_check (peer, afi, safi, PEER_FLAG_ADDPATH_TX_BESTPATH_PER_AS))
vty_out (vty, " neighbor %s addpath-tx-bestpath-per-AS%s", addr, VTY_NEWLINE);
/* ORF capability. */
if (peergroup_af_flag_check (peer, afi, safi, PEER_FLAG_ORF_PREFIX_SM) ||

2
bgpd/bgpd.h
View File

@ -654,6 +654,7 @@ struct peer
#define PEER_FLAG_AS_OVERRIDE (1 << 20) /* as-override */
#define PEER_FLAG_REMOVE_PRIVATE_AS_ALL_REPLACE (1 << 21) /* remove-private-as all replace-as */
#define PEER_FLAG_ADDPATH_TX_ALL_PATHS (1 << 22) /* addpath-tx-all-paths */
#define PEER_FLAG_ADDPATH_TX_BESTPATH_PER_AS (1 << 23) /* addpath-tx-bestpath-per-AS */
/* MD5 password */
char *password;
@ -1152,6 +1153,7 @@ extern struct peer *peer_unlock_with_caller(const char *, struct peer *);
extern bgp_peer_sort_t peer_sort (struct peer *peer);
extern int peer_active (struct peer *);
extern int peer_active_nego (struct peer *);
extern void bgp_recalculate_all_bestpaths (struct bgp *bgp);
extern struct peer *peer_create(union sockunion *, const char *, struct bgp *,
as_t, as_t, int, afi_t, safi_t);
extern struct peer *peer_create_accept (struct bgp *);