RE: BGP Cond Route Injection

From: Reza Toghraee (reza@toghraee.com)
Date: Wed Oct 22 2008 - 05:35:44 ARST

Dear Dennis,

I didn't test or lab-it-up , but according to your configuration I think :
1) bgp inject-map goal is to Conditionally Advertise sub-routes of an
Aggregate. You can not use it to inject some prefixes from routing table to
the bgp. Since you don't have any AGGREGATE. I think first you must create
an AGGREGATE.

2) the route-map which you used is :
route-map LEARNED_PATH permit 10
 match ip address prefix-list EXITSING_ROUTE ROUTE-SOURCE
!
I never seen this form, I think the correct way is :

route-map LEARNED_PATH permit 10
 match ip address prefix-list EXITSING_ROUTE
 match ip route-source ROUTE-SOURCE
!

Regards
Reza Toghraee

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Dennis Worth
Sent: Wednesday, October 22, 2008 9:47 AM
To: Cisco certification
Subject: BGP Cond Route Injection

I have spent the last 2 hours fumbling with this configure and understand
it. Any help figuring out what I've done wrong would be awesome.

Here are my configs.

RSRack1R3(config-router)#do sh ip bgp
BGP table version is 18, local router ID is 150.1.3.3
Status codes: s suppressed, d damped, h history, * valid, > best, i -
internal,
              r RIB-failure, S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete

   Network Next Hop Metric LocPrf Weight Path
*> 28.119.16.0/24 204.12.1.254 0 0 54 i
* i 204.12.1.254 0 100 0 54 i
* i 150.1.6.6 0 100 0 54 i
*> 28.119.17.0/24 204.12.1.254 0 0 54 i
* i 204.12.1.254 0 100 0 54 i
* i 150.1.6.6 0 100 0 54 i
*> 112.0.0.0 204.12.1.254 0 54 50 60 i
* i 204.12.1.254 0 100 0 54 50 60 i
* i 150.1.6.6 0 100 0 54 50 60 i
*> 113.0.0.0 204.12.1.254 0 54 50 60 i
* i 204.12.1.254 0 100 0 54 50 60 i
* i 150.1.6.6 0 100 0 54 50 60 i
*> 114.0.0.0 204.12.1.254 0 54 i
* i 204.12.1.254 0 100 0 54 i
* i 150.1.6.6 0 100 0 54 i
*> 115.0.0.0 204.12.1.254 0 54 i
* i 204.12.1.254 0 100 0 54 i
   Network Next Hop Metric LocPrf Weight Path
* i 150.1.6.6 0 100 0 54 i
*> 116.0.0.0 204.12.1.254 0 54 i
* i 204.12.1.254 0 100 0 54 i
* i 150.1.6.6 0 100 0 54 i
*> 117.0.0.0 204.12.1.254 0 54 i
* i 204.12.1.254 0 100 0 54 i
* i 150.1.6.6 0 100 0 54 i
*> 118.0.0.0 204.12.1.254 0 54 i
* i 204.12.1.254 0 100 0 54 i
* i 150.1.6.6 0 100 0 54 i
*> 119.0.0.0 204.12.1.254 0 54 i
* i 204.12.1.254 0 100 0 54 i
* i 150.1.6.6 0 100 0 54 i
*>i150.1.0.0/20 167.1.58.8 0 100 0 65078 i
r>i167.1.4.0/24 150.1.4.4 0 100 0 i
*>i167.1.5.0/24 167.1.135.5 0 100 0 i
*>i205.90.31.0 192.10.1.254 0 100 0 254 ?
*>i220.20.3.0 192.10.1.254 0 100 0 254 ?
*>i222.22.2.0 192.10.1.254 0 100 0 254 ?

RSRack1R3(config-router)# do sh run | b router bgp
router bgp 100
 no synchronization
 bgp log-neighbor-changes
 bgp inject-map ORIGINATE exist-map LEARNED_PATH
 neighbor AS-100-PEER peer-group
 neighbor AS-100-PEER remote-as 100
 neighbor AS-100-PEER update-source Loopback0
 neighbor AS-100-PEER route-reflector-client
 neighbor AS-100-PEER next-hop-self
 neighbor AS-100-PEER send-community
 neighbor AS-100-PEER route-map TO_IBGP_PEERS out
 neighbor 150.1.1.1 peer-group AS-100-PEER
 neighbor 150.1.4.4 peer-group AS-100-PEER
 neighbor 150.1.6.6 peer-group AS-100-PEER
 neighbor 150.1.9.9 peer-group AS-100-PEER
 neighbor 150.1.9.9 shutdown
 neighbor 150.1.10.10 peer-group AS-100-PEER
 neighbor 150.1.10.10 shutdown
 neighbor 167.1.135.5 peer-group AS-100-PEER
 neighbor 204.12.1.254 remote-as 54
 neighbor 204.12.1.254 remove-private-AS
 neighbor 204.12.1.254 route-map PREPEND out
 no auto-summary
!
ip classless
!
ip http server
no ip http secure-server
!
!
ip prefix-list EXITSING_ROUTE seq 5 permit 150.1.0.0/20
!
ip prefix-list ROUTE-SOURCE seq 5 permit 167.1.135.5/32
!
ip prefix-list SPECIFIC-ROUTE seq 5 permit 150.1.8.0/24
!
ip prefix-list SW2_LOOP seq 5 permit 150.1.8.0/24
!
ip prefix-list VLAN_4_and_VLAN_5 seq 5 permit 167.1.4.0/24
ip prefix-list VLAN_4_and_VLAN_5 seq 10 permit 167.1.5.0/24
!
route-map LEARNED_PATH permit 10
 match ip address prefix-list EXITSING_ROUTE ROUTE-SOURCE
!
route-map ORIGINATE permit 10
 set ip address prefix-list SW2_LOOP
!
route-map TO_IBGP_PEERS deny 10
 match ip address prefix-list SPECIFIC-ROUTE
!
route-map TO_IBGP_PEERS permit 1000
!
route-map PREPEND permit 10
 match ip address prefix-list VLAN_4_and_VLAN_5
 set as-path prepend 100 100
!
route-map PREPEND permit 1000

RSRack1R3#sh ip bgp injected-paths
>>>>BLANK<<<<

Maybe I'm just tired! 

-- 
Dennis Worth

Blogs and organic groups at http://www.ccie.net

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