From: David Sapp (dsapp@xxxxxxxxx)
Date: Fri Jun 28 2002 - 15:21:43 GMT-3
There seems to be may a bug with some versions of IOS. What is the platform
and IOS image you are seeing this problem on? I used 2 different version in
2 different router platforms and here are the results: R1 ---not
working--R2 is find.
R1
r1#sho run | beg router eigrp
router eigrp 16
network 100.0.0.0
network 101.0.0.0
network 200.200.102.0
network 200.200.200.0
network 201.201.201.0
no auto-summary
!
router bgp 100
network 100.1.100.0 backdoor
network 200.200.200.0 backdoor
network 201.201.201.0
neighbor 100.1.15.5 remote-as 300
neighbor 100.1.16.6 remote-as 200
R2
r2#sho run | beg router eigrp
router eigrp 16
network 100.0.0.0
network 106.0.0.0
network 200.200.200.0
no auto-summary
!
router bgp 200
network 100.1.100.0 mask 255.255.255.0
network 200.200.200.0
neighbor 100.1.16.1 remote-as 100
neighbor 100.1.56.5 remote-as 300
!
r2#sho ip bgp sum
Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ
Up/Down State/PfxRcd
100.1.16.1 4 100 98 103 4 0 0 00:36:44 1
100.1.56.5 4 300 76 80 4 0 0 00:36:39 1
r2#sho ip bgp nei 100.1.16.1 adv
Network Next Hop Metric LocPrf Weight Path
*> 100.1.100.0/24 0.0.0.0 0 32768 i
*> 200.200.200.0 0.0.0.0 0 32768 i
r2#
r1#sho ip ro
Gateway of last resort is not set
B 200.200.200.0/24 [20/0] via 100.1.16.6, 00:28:45 <------Backdoor set
but not working
C 201.201.201.0/24 is directly connected, Loopback201
100.0.0.0/24 is subnetted, 4 subnets
B 100.1.100.0 [20/0] via 100.1.16.6, 00:28:45<------Backdoor set but
not working
r1#sho ip bgp sum
Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ
Up/Down State/PfxRcd
100.1.15.5 4 300 89 90 7 0 0 00:46:16 2
100.1.16.6 4 200 107 102 7 0 0 00:40:38 2
r1#
r1#sho ip bgp nei 100.1.16.6 adv
Network Next Hop Metric LocPrf Weight Path
*> 201.201.201.0 0.0.0.0
r2#sho ip ro
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter
area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Gateway of last resort is not set
C 200.200.200.0/24 is directly connected, Loopback200
B 201.201.201.0/24 [20/0] via 100.1.16.1, 00:11:35
r2#conf t
Enter configuration commands, one per line. End with CNTL/Z.
r2(config)#router bgp 200
r2(config-router)#net 201.201.201.0 ba
r2(config-router)#net 201.201.201.0 backdoor
r2(config-router)#end
r2#sho run | beg router bgp 200
router bgp 200
network 100.1.100.0 mask 255.255.255.0
network 200.200.200.0
network 201.201.201.0 backdoor
neighbor 100.1.16.1 remote-as 100
neighbor 100.1.56.5 remote-as 300
r2#sho ip ro
Gateway of last resort is not set
C 200.200.200.0/24 is directly connected, Loopback200
D 201.201.201.0/24 [90/409600] via 100.1.16.1, 00:01:06, Ethernet0
<---***Works after setting backdoor config****
Problem is most likely IOS bug. But I would not worry or spend to much time
on this your configuration is correct :-)
Regards
Dave
At 08:53 AM 6/28/02 -0700, Annu Roopa wrote:
>Carlos,
>
>If u see my previous mail its 12.1(5)T on all
>routers,even on R2.By "backdoor 175.10.10.0" i mean
>"router bgp x/network 175.10.0.0 backdoor" yes u are
>right.
>
>I have even tried putting in 'network 175.10.10.0 mask
>255.255.255.0 backdoor' on R2 under BGP process. Will
>post in the exact configs today with IP/BGP tables
>when i get back home.
>
>Looks like bug ? unless i am missing something or
>doing it wrong.
>
>=====
>Thanks in advance for ur time and replies.
>Annu.
>
This archive was generated by hypermail 2.1.4 : Tue Jul 02 2002 - 08:12:43 GMT-3