From: Steve Krantz (Steve.Krantz@inacom.com)
Date: Mon Dec 05 2005 - 23:39:43 GMT-3
I know this subject has been covered before, but I can't see what I'm
doing wrong?
Trying to generate a default route for neighbor 140.2.7.7 based on the
presence of the 140.2.6.0/24 route.
I was able to do this successfully with the prefix list (ROUTE - below)
instead of an acl, but I'm wondering what's wrong with this config.
!
router bgp 10342
neighbor 140.2.7.7 remote-as 8302
neighbor 140.2.7.7 ebgp-multihop 255
neighbor 140.2.7.7 update-source Loopback0
neighbor 140.2.7.7 default-originate route-map R6Exist
no auto-summary
!
ip prefix-list ROUTE seq 5 permit 140.2.6.0/24
!
access-list 146 permit ip host 140.2.6.0 host 255.255.255.0
!
route-map R6Exist permit 10
match ip address 146
R9(config-router)#do sh ip bgp neigh 140.2.7.7 adv
BGP table version is 10, local router ID is 140.2.9.9
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
*> 160.2.40.0/22 0.0.0.0 32768 i
R9(config-router)#
Gateway of last resort is not set
R 222.222.222.0/24 [120/1] via 150.2.1.102, 00:00:12, FastEthernet0/0
R 192.168.25.0/24 [120/5] via 150.2.12.6, 00:00:29, FastEthernet0/1
140.2.0.0/16 is variably subnetted, 14 subnets, 5 masks
R 140.2.8.0/24 [120/1] via 150.2.1.8, 00:00:11, FastEthernet0/0
C 140.2.9.0/24 is directly connected, Loopback0
R 140.2.6.0/24 [120/5] via 150.2.12.6, 00:00:29, FastEthernet0/1
R 140.2.7.0/24 [120/2] via 150.2.1.8, 00:00:11, FastEthernet0/0
R 140.2.5.5/32 [120/5] via 150.2.12.6, 00:00:00, FastEthernet0/1
R 140.2.4.4/32 [120/5] via 150.2.12.6, 00:00:00, FastEthernet0/1
R 140.2.1.1/32 [120/5] via 150.2.12.6, 00:00:00, FastEthernet0/1
R 140.2.36.0/24 [120/5] via 150.2.12.6, 00:00:00, FastEthernet0/1
R 140.2.35.0/24 [120/5] via 150.2.12.6, 00:00:00, FastEthernet0/1
R 140.2.56.0/29 [120/5] via 150.2.12.6, 00:00:00, FastEthernet0/1
R 140.2.78.8/29 [120/1] via 150.2.1.8, 00:00:12, FastEthernet0/0
R 140.2.68.0/28 [120/2] via 150.2.1.8, 00:00:12, FastEthernet0/0
R 140.2.100.0/28 [120/5] via 150.2.12.6, 00:00:00, FastEthernet0/1
R 140.2.112.0/22 [120/5] via 150.2.12.6, 00:00:00, FastEthernet0/1
111.0.0.0/32 is subnetted, 1 subnets
R 111.111.111.111 [120/5] via 150.2.12.6, 00:00:00,
FastEthernet0/1
160.2.0.0/16 is variably subnetted, 5 subnets, 2 masks
C 160.2.42.0/24 is directly connected, Loopback42
C 160.2.43.0/24 is directly connected, Loopback43
C 160.2.40.0/24 is directly connected, Loopback40
B 160.2.40.0/22 [200/0] via 0.0.0.0, 03:43:31, Null0
C 160.2.41.0/24 is directly connected, Loopback41
150.2.0.0/16 is variably subnetted, 3 subnets, 2 masks
R 150.2.2.2/32 [120/5] via 150.2.12.6, 00:00:01, FastEthernet0/1
C 150.2.1.0/24 is directly connected, FastEthernet0/0
C 150.2.12.0/24 is directly connected, FastEthernet0/1
Cisco's example - Notice typo, I'm pretty sure they mean "match ip
address 100" not "1"
In the following example, the last line of the configuration has been
changed to show the use of an extended access list. The local router
injects route 0.0.0.0 to the neighbor 172.16.2.3 only if there is a
route to 198.92.68.0 with a mask of 255.255.0.0:
router bgp 109
network 172.16.0.0
neighbor 172.16.2.3 remote-as 200
neighbor 172.16.2.3 default-originate route-map default-map
!
route-map default-map 10 permit
match ip address 1
!
access-list 100 permit ip host 198.92.68.0 host 255.255.255.0
Thanks,
Steve Krantz
Consulting Engineer
Inacom Information Systems
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