[c-nsp] BGP not advertising supernet to RR's

[CiscoNSP List]

Hi Everyone,


Have a problem with supernet being advertised from an ASR1006 to our RR's - Prefix is in the routing table, and in bgp, but the router is only advertising smaller prefixes to the RR's (/30,/29, 28 etc)...I

dont *think* its due to the PL (As it should be allowing anything less that /32...which it appears to be doing as /30,/29 etc are being advertised?)


Appreciate any assistance.


** Ah - Update, just noticed as I was about to hit send that the supernet is not being tagged with any community.....smaller prefixes are though? So route-map is tagging "some" prefixes within the

supernet?


router bgp 1***6
 address-family ipv4
  redistribute connected route-map G----_RANGES
  redistribute static route-map G----_RANGES


neighbor xxx.xxx.76.204 route-map TO_ME1_RR out


route-map TO_ME1_RR permit 10
 match community CL_G----_RANGES
route-map TO_ME1_RR permit 20
 match community CL_G----_CUST_BGP_RANGES
route-map TO_ME1_RR permit 30
 match community CL_DEFAULT_ROUTE


ip community-list standard CL_G----_RANGES permit 1***6:1301
ip community-list standard CL_G----_RANGES permit 1***6:1302


route-map G----_RANGES permit 10
 match ip address prefix-list PL_G----_PREFIXES
 set community 1***6:1000 1***6:1301 1***6:11000
route-map G----_RANGES permit 20
 match ip address prefix-list PL_N***S_PREFIXES
 set community 1***6:1400


ip prefix-list PL_G----_PREFIXES description G---- _PREFIXES
ip prefix-list PL_G----_PREFIXES seq 5 permit xxx.xxx.xxx.xxx.0/20 le 32
ip prefix-list PL_G----_PREFIXES seq 10 permit yyy.yyy.yyy.yyy/21 le 32



#sh ip prefix-list PL_G----_PREFIXES seq 5
   seq 5 permit xxx.xxx.xxx.xxx.0/20 le 32 (hit count: 4833, refcount: 1)


#sh ip route xxx.xxx.xxx.xxx.0 255.255.240.0
Routing entry for xxx.xxx.xxx.xxx.0/20, supernet
  Known via "static", distance 1, metric 0 (connected)
  Redistributing via bgp 1***6, ospf 100
  Advertised by bgp 1***6 route-map G----_RANGES
  Routing Descriptor Blocks:
  * directly connected, via Null0
      Route metric is 0, traffic share count is 1


#sh ip bgp xxx.xxx.xxx.xxx.0 255.255.240.0
BGP routing table entry for xxx.xxx.xxx.xxx.0/20, version 311740657
Paths: (1 available, best #1, table default)
  Advertised to update-groups:
     544        552        555        591
  Refresh Epoch 1
  Local
    0.0.0.0 from 0.0.0.0 (xxx.xxx.76.253)
      Origin IGP, metric 0, localpref 100, weight 32768, valid, sourced, local, best
      rx pathid: 0, tx pathid: 0x0


#sh ip bgp neighbors xxx.xxx.76.204 advertised-routes

 *>  xxx.xxx.xxx.xxx.32/30 0.0.0.0                  0         32768 ?
 *>  xxx.xxx.xxx.xxx.40/30 0.0.0.0                  0         32768 ?
 *>  xxx.xxx.xxx.xxx.72/29 xxx.xxx.xxx.xxx.90            0         32768 ?
 *>  xxx.xxx.xxx.xxx.88/30 0.0.0.0                  0         32768 ?
 *>  xxx.xxx.xxx.xxx.100/30
                       0.0.0.0                  0         32768 ?
     Network          Next Hop            Metric LocPrf Weight Path
 *>  xxx.xxx.xxx.xxx.112/28
                       xxx.xxx.78.230           0         32768 ?
 *>  xxx.xxx.xxx.xxx.136/30
                       xxx.xxx.78.230           0         32768 ?
 *>  xxx.xxx.xxx.xxx.164/30
                       xxx.xxx.xxx.xxx.102           0         32768 ?


Thanks