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>

diff --git a/bgpd/bgp_route.c b/bgpd/bgp_route.c
index ed3b75f87c88e9161adcdf69f0c6d468ad0e8a8f..50c484d7de7b8264eef6f1c1b89b9aba986204f3 100644 (file)
--- a/bgpd/bgp_route.c
+++ b/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"