[c-nsp] Problem with route-maps and communities

[Marco Matarazzo]

Hi all,

I'm trying to send to an iBGP neighbor some routes based on a community. But
there must be something REALLY wrong in my config...

This is the relevant config of the first (main) router:

i#sh ver
Cisco Internetwork Operating System Software
IOS (tm) 7200 Software (C7200-IK9O3S-M), Version 12.3(1a), RELEASE SOFTWARE
(fc1)
cisco 7206VXR (NPE400) processor (revision A) with 245760K/16384K bytes of
memory.

router bgp 8980
 no synchronization
 bgp router-id 213.171.160.1
 bgp cluster-id 3559115777
 bgp log-neighbor-changes
 bgp dampening
 network 212.35.xxx.xxx mask 255.255.224.0
 network 213.171.xxx.xxx mask 255.255.224.0
 neighbor 81.29.x.y remote-as ISPAS
 neighbor 81.29.x.y prefix-list MYPREFIX out
 neighbor 81.29.x.y weight 50
 neighbor 213.171.x.y remote-as MYAS
 neighbor 213.171.x.y description iBGP
 neighbor 213.171.x.y update-source Loopback0
 neighbor 213.171.x.y next-hop-self
 neighbor 213.171.x.y send-community
 neighbor 213.171.x.y default-originate
 neighbor 213.171.x.y route-map IBGPOUT out
 neighbor 213.171.x.z remote-as MYAS
 neighbor 213.171.x.z prefix-list MIXIN in
 neighbor 213.171.x.z route-map MIXIN in
 neighbor 213.171.x.z route-map MIXOUT out
 neighbor 213.171.x.z update-source Loopback0
 neighbor 213.171.x.z weight 300
 no auto-summary

ip community-list standard mixlearned permit 588513380

ip prefix-list MYPREF seq 5 permit 212.35.192.0/19
ip prefix-list MYPREF seq 10 permit 213.171.160.0/19
ip prefix-list MYPREF seq 15 permit 0.0.0.0/0


route-map IBGPOUT permit 10
 match community mixlearned
!
route-map IBGPOUT permit 20
 match ip address prefix-list MYPREF

route-map MIXOUT permit 10
 match as-path 2
 set local-preference 100

route-map MIXIN permit 10
 set community 588513380


213.171.x.y is the peer I'm having problems. Basically I apply a route-map
to incoming routes from 213.171.x.z (located in a local Internet Exchange)
and I add a community to them. I want to announce only this tagged routes,
together with a default and my own prefixes to an iBGP neighbor.
Unfortunately I can't give this neighbor ALL the routes since it only has
128Mb of memory.

a #sh ip bgp route-map IBGPOUT shows correctly all the intended routes.

but a #sh ip bgp ne 213.171.x.y shows:

 For address family: IPv4 Unicast
  BGP table version 792109, neighbor version 792109
  Index 3, Offset 0, Mask 0x8
  NEXT_HOP is always this router
  Community attribute sent to this neighbor
  Default information originate, default sent
  Outbound path policy configured
  Route map for outgoing advertisements is IBGPOUT
                                 Sent       Rcvd
  Prefix activity:               ----       ----
    Prefixes Current:               2          0
    Prefixes Total:                10          1
    Implicit Withdraw:              8          0
    Explicit Withdraw:              0          1
    Used as bestpath:             n/a          0
    Used as multipath:            n/a          0

                                   Outbound    Inbound
  Local Policy Denied Prefixes:    --------    -------
    route-map:                       812258          0
    Bestpath from iBGP peer:          34735        n/a
    Total:                           846993          0

The router is only advertising my prefixes and the default. All other routes
are "Local Policy Denied" by the route-map (I can see the counters going
up). I've clear the peers a couple of thousands of times... :D

What could be wrong?!?!? If you need the config of the other router, no
probs. But it shouldn't care, as the routes are being blocked at this
router!

Thanks!
]\/[arco