From: John (jgarrison1@austin.rr.com)
Date: Tue Sep 25 2007 - 01:12:25 ART
one other thing if I redistribute connected in eigrp. I get connectivity to
the "outside" interfaces of AS 2 but I cannot ping the interfaces their
connected to ie R4 or 5's interfaces. Make that 2 other things. I can ping
the ethernets connected to R4 and 5 from the routers that are directly
connected to them and R3, but I cannot ping the interfaces of R4 and 5 that
are directly connected to those routers. Weird beyond belief, or I'm brain
dead(be nice)
----- Original Message -----
From: "Joseph Brunner" <joe@affirmedsystems.com>
To: "'John'" <jgarrison1@austin.rr.com>; <ccielab@groupstudy.com>
Sent: Monday, September 24, 2007 6:49 PM
Subject: RE: IWE BGP
> John, I have tried to go through this config; and draw it out in my head.
>
> "Show ip interface brief" and "show ip bgp summary" in the future would
> also
> be helpful to us to provide more assistance ;)
>
> Here is how I normally go about solving these issues in my lab...
>
> Do some "debug ip icmp" + "term mon" on the routers send and receiving the
> pings, lets see what's failing. Debug ip packet <ACL> also helps, again
> with
> term mon turned on, or "logging console" if you are directly connected.
>
> The next hop is automatically reset to the outgoing interface for EBGP (or
> if the update-source is set, it will use that interface). I suspect a
> broken
> igp underlying your perhaps working bgp config.
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> John
> Sent: Monday, September 24, 2007 9:19 PM
> To: John; ccielab@groupstudy.com
> Subject: Re: IWE BGP
>
> error R2 not R1 is connected to R5 via EBGP
>
> ----- Original Message -----
> From: "John" <jgarrison1@austin.rr.com>
> 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
>>
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