From: John (jgarrison1@austin.rr.com)
Date: Mon Sep 24 2007 - 22:05:44 ART
----- Original Message -----
From: John
To: ccielab@groupstudy.com
Sent: Monday, September 24, 2007 7:03 PM
Subject: IWE BGP
This is killing me I've set up this same lab a number of times. It appears
that the BGP and routing tables are correct at all routers.R1 R2 R3 are in AS2
R4 is in AS3 and R5 is in AS1. From R4 I cannot ping R3 or R5's
ethernet/vlan(155.1.37.0, 155.1.5.0), but from R3 I can ping R4 and R5's
ethernet/vlan here is the relevant info for R4
Network Next Hop Metric LocPrf Weight Path
*> 155.1.5.0/24 155.1.146.1 0 2 1 i
*> 155.1.37.0/24 155.1.146.1 0 2 i
*> 204.12.1.0 0.0.0.0 0 32768 i
Rack1R4#sh ip route
C 204.12.1.0/24 is directly connected, FastEthernet0/1
155.1.0.0/24 is subnetted, 3 subnets
C 155.1.146.0 is directly connected, FastEthernet0/0
B 155.1.5.0 [20/0] via 155.1.146.1, 00:37:13
B 155.1.37.0 [20/0] via 155.1.146.1, 00:37:13
Rack1R4#sh ip bgp 155.1.5.0
BGP routing table entry for 155.1.5.0/24, version 2
Paths: (1 available, best #1, table Default-IP-Routing-Table)
Not advertised to any peer
2 1
155.1.146.1 from 155.1.146.1 (155.1.146.1)
Origin IGP, localpref 100, valid, external, best
Rack1R4#sh ip bgp 155.1.37.0
BGP routing table entry for 155.1.37.0/24, version 3
Paths: (1 available, best #1, table Default-IP-Routing-Table)
Not advertised to any peer
2
155.1.146.1 from 155.1.146.1 (155.1.146.1)
Origin IGP, localpref 100, valid, external, best
Heres where it gets weird R4 is connected to R1 via EBGP and from R1 I can
ping R3 and R4's ethernet /vlan(155.1.37.0, 204.12.1.0), but not
R5's(155.1.5.0). From R1 I cannot reach 155.1.0.0 which is connecting R1 to
R5 via EBGP, but I can reach 155.1.23.0 which connects R3 to R2 via IBGP and
EIGRP heres R1's relevant info
Network Next Hop Metric LocPrf Weight Path
*>i155.1.5.0/24 155.1.23.2 0 100 0 1 i
*>i155.1.37.0/24 155.1.13.3 0 100 0 i
*> 204.12.1.0 155.1.146.4 0 0 3 i
Rack1R1#sh ip route
Codes: C - connected, S - static, 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
i - IS-IS, su - IS-IS summary, 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
B 204.12.1.0/24 [20/0] via 155.1.146.4, 00:53:17
155.1.0.0/24 is subnetted, 5 subnets
C 155.1.146.0 is directly connected, FastEthernet0/0
D 155.1.23.0 [90/2681856] via 155.1.13.3, 01:37:10, Serial2/1
C 155.1.13.0 is directly connected, Serial2/1
B 155.1.5.0 [200/0] via 155.1.23.2, 00:54:49
B 155.1.37.0 [200/0] via 155.1.13.3, 01:30:38
Rack1R1#sh ip bgp 155.1.5.0
BGP routing table entry for 155.1.5.0/24, version 6
Paths: (1 available, best #1, table Default-IP-Routing-Table)
Advertised to update-groups:
1
1
155.1.23.2 (metric 2681856) from 155.1.23.2 (155.1.23.2)
Origin IGP, metric 0, localpref 100, valid, internal, best
This archive was generated by hypermail 2.1.4 : Sat Oct 06 2007 - 12:01:15 ART