Hi,Would someone explain to me how the #redistribute connected command
works in BGP?This is a long email with the configs, so please bear with
me. I have 5 routers interconnected:RTE--->RTD----->RTZ | |
RTF---->RTA----->RTZ RTE and RTF are connected via E0RTE to RTD via s0
and s1RTF to RTA via s1 RTD, RTA and RTZ connected via e0 RTE and RTF are
in AS100 RTD in AS300 RTA in AS200 RTZ in AS600 Eigrp 100 is running on
RTE and RTF. The question is: Even though the route entry for 5.0.0.0
and 6.0.0.0 is in the BGP and the routing tables of RTD and RTA, I cannot
ping 5.5.5.5 or 6.6.6.6. But the moment I configure the command, #redist
conn on RTE and RTF, it works!! I had the same problem on RTZ. But the
moment I configured the redist conn command on RTZ(mind you, RTZ), I can
ping 5.5.5.5 and 6.6.6.6!! Why and How??? Would someone PLEASE explain
why it does NOT work without the command and why it does then? I know it
is my lack of BGP knowledge but please advise. I am posting the configs
of RTF and the tables on RTA.
RTF#
router eigrp 100
network 6.0.0.0
!
router bgp 100
no synchronization
network 192.168.21.0
redistribute connected
redistribute eigrp 100
neighbor 192.168.21.1 remote-as 100
neighbor 192.168.21.1 next-hop-self
neighbor 192.168.42.2 remote-as 400
no auto-summary
! RTA#sh ip route
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, * - candidate
default
U - per-user static route, o - ODRGateway of last resort is not
setB 1.0.0.0/8 [20/0] via 10.10.1.2, 00:05:01
192.168.31.0/30 is subnetted, 1 subnets
B 192.168.31.0 [20/0] via 192.168.42.1, 00:06:30
192.168.30.0/30 is subnetted, 1 subnets
C 192.168.30.0 is directly connected, Serial0
192.168.42.0/30 is subnetted, 1 subnets
C 192.168.42.0 is directly connected, Serial1
5.0.0.0/32 is subnetted, 1 subnets
B 5.5.5.5 [20/0] via 192.168.42.1, 00:22:41
6.0.0.0/32 is subnetted, 1 subnets
B 6.6.6.6 [20/0] via 192.168.42.1, 00:23:39
B 192.168.21.0/24 [20/0] via 192.168.42.1, 00:23:39
10.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 10.10.1.0/24 is directly connected, Ethernet0
B 10.0.0.0/8 [20/0] via 10.10.1.2, 00:06:42
B 192.1.1.0/24 [20/0] via 192.168.42.1, 00:08:41
B 192.168.1.0/24 [20/0] via 10.10.1.2, 00:06:43
192.168.32.0/30 is subnetted, 1 subnets
B 192.168.32.0 [20/0] via 192.168.42.1, 00:08:11 RTA#sh ip bgp
BGP table version is 33, local router ID is 192.168.1.49
Status codes: s suppressed, d damped, h history, * valid, > best, i -
internal
Origin codes: i - IGP, e - EGP, ? - incomplete Network Next
Hop Metric LocPrf Weight Path
*> 1.0.0.0 10.10.1.2 0 0 600 ?
* 5.5.5.5/32 10.10.1.3 0 600 300 100
?
*> 192.168.42.1 0 100 ?
* 6.6.6.6/32 10.10.1.3 0 600 300 100
?
*> 192.168.42.1 0 0 100 ?
*> 10.0.0.0 10.10.1.2 0 0 600 ?
* 192.1.1.0 10.10.1.2 0 0 600 ?
*> 192.168.42.1 0 0 100 ?
*> 192.168.1.0 10.10.1.2 0 0 600 ?
* 192.168.21.0 10.10.1.3 0 600 300 100
i
*> 192.168.42.1 0 0 100 i
* 192.168.31.0/30 10.10.1.3 0 600 300 100
?
*> 192.168.42.1 0 100 ?
* 192.168.32.0/30 10.10.1.3 0 600 300 100
?
*> 192.168.42.1 0 100 ?
* 192.168.42.0/30 10.10.1.3 0 600 300 100
?
*> 192.168.42.1 0 0 100 ?
RTA#
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