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bgp: Add documentation for IANA well-known communities

Coded as part of #2684 and most code written while participating at
BornHack@2018.

bgp_route.c: Changes regarding adding explanations for the IANA
well-known communities added in #2684

Signed-off-by: Christoffer <netravnen@gmail.com>
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Christoffer
Christoffer committed Aug 24, 2018
1 parent cae770d commit c5f1e1b2403020be7b13a7cc4ce789b36d4dbe8b
Showing with 62 additions and 2 deletions.
  1. +62 −2 bgpd/bgp_route.c
@@ -8581,9 +8581,19 @@ void route_vty_out_detail_header(struct vty *vty, struct bgp *bgp,
int count = 0;
int best = 0;
int suppress = 0;
int accept_own = 0;
int route_filter_translated_v4 = 0;
int route_filter_v4 = 0;
int route_filter_translated_v6 = 0;
int route_filter_v6 = 0;
int llgr_stale = 0;
int no_llgr = 0;
int accept_own_nexthop = 0;
int blackhole = 0;
int no_export = 0;
int no_advertise = 0;
int local_as = 0;
int no_peer = 0;
int first = 1;
int has_valid_label = 0;
mpls_label_t label = 0;
@@ -8660,12 +8670,41 @@ void route_vty_out_detail_header(struct vty *vty, struct bgp *bgp,
} else
vty_out(vty, ", no best path");

if (no_advertise)
vty_out(vty, ", not advertised to any peer");
if (accept_own)
vty_out(vty,
", accept own local route exported and imported in different VRF");
else if (route_filter_translated_v4)
vty_out(vty,
", mark translated RTs for VPNv4 route filtering");
else if (route_filter_v4)
vty_out(vty,
", attach RT as-is for VPNv4 route filtering");
else if (route_filter_translated_v6)
vty_out(vty,
", mark translated RTs for VPNv6 route filtering");
else if (route_filter_v6)
vty_out(vty,
", attach RT as-is for VPNv6 route filtering");
else if (llgr_stale)
vty_out(vty,
", mark routes to be retained for a longer time. Requeres support for Long-lived BGP Graceful Restart");
else if (no_llgr)
vty_out(vty,
", mark routes to not be treated according to Long-lived BGP Graceful Restart operations");
else if (accept_own_nexthop)
vty_out(vty,
", accept local nexthop");
else if (blackhole)
vty_out(vty, ", inform peer to blackhole prefix");
else if (no_export)
vty_out(vty, ", not advertised to EBGP peer");
else if (no_advertise)
vty_out(vty, ", not advertised to any peer");
else if (local_as)
vty_out(vty, ", not advertised outside local AS");
else if (no_peer)
vty_out(vty,
", inform EBGP peer not to advertise to their EBGP peers");

if (suppress)
vty_out(vty,
@@ -9026,6 +9065,10 @@ DEFUN (show_ip_bgp,
|prefix-list WORD\
|filter-list WORD\
|statistics\
|community <AA:NN|local-AS|no-advertise|no-export|graceful-shutdown\
no-peer|blackhole|llgr-stale|no-llgr|accept-own|accept-own-nexthop\
route-filter-v6|route-filter-v4|route-filter-translated-v6|\
route-filter-translated-v4> [exact-match]\
|community-list <(1-500)|WORD> [exact-match]\
|A.B.C.D/M longer-prefixes\
|X:X::X:X/M longer-prefixes\
@@ -9045,6 +9088,23 @@ DEFUN (show_ip_bgp,
"Display routes conforming to the filter-list\n"
"Regular expression access list name\n"
"BGP RIB advertisement statistics\n"
"Display routes matching the communities\n"
COMMUNITY_AANN_STR
"Do not send outside local AS (well-known community)\n"
"Do not advertise to any peer (well-known community)\n"
"Do not export to next AS (well-known community)\n"
"Graceful shutdown (well-known community)\n"
"Do not export to any peer (well-known community)\n"
"Inform EBGP peers to blackhole traffic to prefix (well-known community)\n"
"Staled Long-lived Graceful Restart VPN route (well-known community)\n"
"Removed because Long-lived Graceful Restart was not enabled for VPN route (well-known community)\n"
"Should accept local VPN route if exported and imported into different VRF (well-known community)\n"
"Should accept VPN route with local nexthop (well-known community)\n"
"RT VPNv6 route filtering (well-known community)\n"
"RT VPNv4 route filtering (well-known community)\n"
"RT translated VPNv6 route filtering (well-known community)\n"
"RT translated VPNv4 route filtering (well-known community)\n"
"Exact match of the communities\n"
"Display routes matching the community-list\n"
"community-list number\n"
"community-list name\n"

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