From: Scott Morris (smorris@internetworkexpert.com)
Date: Wed Oct 22 2008 - 13:12:30 ARST
Glad it worked!
Scott
_____
From: Dennis Worth [mailto:dennis.worth@gmail.com]
Sent: Wednesday, October 22, 2008 10:34 AM
To: smorris@internetworkexpert.com
Cc: Cisco certification
Subject: Re: BGP Cond Route Injection
Thanks Guys for the feedback.
I change the route-map to match on source which was pointed out.
That did the trick!
MAN! I looked at this stuff and read the DOCCD like 3 times, and still could
not see that error. I think I understand route Injection NOW!
The funniest thing about this was exactly that I was focused on the route
source from R5, and I had the next hop at first before I read the DOCCd, and
changed it to match the peering address which was stated.
RSRack1R3(config-route-map)#do sh ip bgp inj
BGP table version is 23, 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
* i150.1.8.0/24 167.1.58.8 0 ?
<-----YEAH!!!
Thank You all again!
On Wed, Oct 22, 2008 at 6:17 AM, Scott Morris
<smorris@internetworkexpert.com> wrote:
The idea behind the inject map is to bring in more specific prefixes about
what was learned.
You are matching one thing, and that must be in yout table (self-generated
or learned):
*>i150.1.0.0/20 167.1.58.8 0 100 0 65078 I
Then you match route-source.
ip prefix-list ROUTE-SOURCE seq 5 permit 167.1.135.5/32 !
Now, that peer address and the next-hop listed in BGP are different. That
MAY be ok, but I can't determine from what you put down below whether the
ROUTE-SOURCE (a listed neighbor command) matches up with where that next-hop
came from? Check out "show ip bgp 150.1.0.0".
Now, the next part. Your route-map. I have personally never tried putting
things on one line as you have there:
route-map LEARNED_PATH permit 10
match ip address prefix-list EXITSING_ROUTE ROUTE-SOURCE !
I'd try:
route-map LEARNED_PATH permit 10
match ip address prefix-list EXITSING_ROUTE
match ip route-source prefix-list ROUTE-SOURCE
And see where you go from there. As long as your injected route
(Prefix-List SW2_LOOP) is a subset of the original routes (which it is) then
you should do just fine.
Don't forget to verify with "show ip bgp inject"
HTH,
Scott Morris, CCIE4 #4713, JNCIE-M #153, JNCIS-ER, CISSP, et al.
CCSI/JNCI-M/JNCI-ER
Senior CCIE Instructor
smorris@internetworkexpert.com
Knowledge is power.
Power corrupts.
Study hard and be Eeeeviiiil......
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Dennis Worth
Sent: Wednesday, October 22, 2008 1:47 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 WorthBlogs and organic groups at http://www.ccie.net
This archive was generated by hypermail 2.1.4 : Sat Nov 01 2008 - 15:35:22 ARST