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bgpd: Reflect the distance in RIB when it is changed for an arbitrary afi/safi

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debian-9# show ip route 192.168.255.2/32 longer-prefixes
Codes: K - kernel route, C - connected, S - static, R - RIP,
       O - OSPF, I - IS-IS, B - BGP, E - EIGRP, N - NHRP,
       T - Table, v - VNC, V - VNC-Direct, A - Babel, D - SHARP,
       F - PBR, f - OpenFabric,
       > - selected route, * - FIB route, q - queued route, r - rejected route

B>* 192.168.255.2/32 [20/0] via 192.168.0.1, eth1, 00:15:22
debian-9# conf
debian-9(config)# router bgp 100
debian-9(config-router)# address-family ipv4
debian-9(config-router-af)# distance bgp 123 123 123
debian-9(config-router-af)# do show ip route 192.168.255.2/32 longer-prefixes
Codes: K - kernel route, C - connected, S - static, R - RIP,
       O - OSPF, I - IS-IS, B - BGP, E - EIGRP, N - NHRP,
       T - Table, v - VNC, V - VNC-Direct, A - Babel, D - SHARP,
       F - PBR, f - OpenFabric,
       > - selected route, * - FIB route, q - queued route, r - rejected route

B>* 192.168.255.2/32 [123/0] via 192.168.0.1, eth1, 00:00:09
debian-9(config-router-af)# no distance bgp
debian-9(config-router-af)# do show ip route 192.168.255.2/32 longer-prefixes
Codes: K - kernel route, C - connected, S - static, R - RIP,
       O - OSPF, I - IS-IS, B - BGP, E - EIGRP, N - NHRP,
       T - Table, v - VNC, V - VNC-Direct, A - Babel, D - SHARP,
       F - PBR, f - OpenFabric,
       > - selected route, * - FIB route, q - queued route, r - rejected route

B>* 192.168.255.2/32 [20/0] via 192.168.0.1, eth1, 00:00:02
debian-9(config-router-af)#

Signed-off-by: Donatas Abraitis <donatas.abraitis@gmail.com>
This commit is contained in:
Donatas Abraitis 2019-10-31 09:53:18 +02:00
parent 745a40481d
commit afaef3e7fb
1 changed files with 27 additions and 0 deletions
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27
bgpd/bgp_route.c
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@ -11625,6 +11625,31 @@ uint8_t bgp_distance_apply(struct prefix *p, struct bgp_path_info *pinfo,
}
}
/* If we enter `distance bgp (1-255) (1-255) (1-255)`,
* we should tell ZEBRA update the routes for a specific
* AFI/SAFI to reflect changes in RIB.
*/
static void bgp_announce_routes_distance_update(struct bgp *bgp)
{
afi_t afi;
safi_t safi;
FOREACH_AFI_SAFI (afi, safi) {
if (!bgp_fibupd_safi(safi))
continue;
if (bgp->distance_ebgp[afi][safi]
&& bgp->distance_ibgp[afi][safi]
&& bgp->distance_local[afi][safi]) {
if (BGP_DEBUG(zebra, ZEBRA))
zlog_debug(
"%s: Announcing routes due to distance change afi/safi (%d/%d)",
__func__, afi, safi);
bgp_zebra_announce_table(bgp, afi, safi);
}
}
}
DEFUN (bgp_distance,
bgp_distance_cmd,
"distance bgp (1-255) (1-255) (1-255)",
@ -11647,6 +11672,7 @@ DEFUN (bgp_distance,
bgp->distance_ebgp[afi][safi] = atoi(argv[idx_number]->arg);
bgp->distance_ibgp[afi][safi] = atoi(argv[idx_number_2]->arg);
bgp->distance_local[afi][safi] = atoi(argv[idx_number_3]->arg);
bgp_announce_routes_distance_update(bgp);
return CMD_SUCCESS;
}
@ -11670,6 +11696,7 @@ DEFUN (no_bgp_distance,
bgp->distance_ebgp[afi][safi] = 0;
bgp->distance_ibgp[afi][safi] = 0;
bgp->distance_local[afi][safi] = 0;
bgp_announce_routes_distance_update(bgp);
return CMD_SUCCESS;
}