From: EDL (r.s.cciestudy@gmail.com)
Date: Fri Jan 18 2008 - 18:20:28 ARST
Hey,
Just do a show ip bgp on R3. Look at the next-hop for R5's route. That is
your problem area. You did not advertise it to OSPF.
HTH,
Ed
----- Original Message -----
From: "uyota oyearone" <spycharlies@hotmail.com>
To: "CCIE" <ccielab@groupstudy.com>
Sent: Wednesday, January 16, 2008 4:15 PM
Subject: troubleshooting bgp confederation, HELP!!
> Hi Engineers;
>
> Am having problems pinging and tracing an advertised network via BGP
> Confederation. Here is the basic config. let me know if am missing
> something
> OR how i can troubleshooting this problem.
>
> ***
> [R3(as 65013)]s1/3-->s1/1[r2(as 65002)]s1/0-->frameRelay-->s1/0[r5(as
> 1)]--r3
> & R2 Directly connected, r2 & R5 thru. Frame Relay***
> --R3#
> interface Ethernet0/0 ip address 155.1.3.3 255.255.255.0!router ospf 1
> router-id 3.3.3.3 log-adjacency-changes network 155.1.23.3 0.0.0.0 area
> 0!router bgp 65013 no synchronization bgp log-neighbor-changes bgp
> confederation identifier 2 bgp confederation peers 65002 network 155.1.3.0
> mask 255.255.255.0 neighbor 155.1.23.2 remote-as 65002 no auto-summary
> --R2#
> interface Ethernet0/1 ip address 155.1.5.5 255.255.255.0!interface
> Serial1/0
> ip address 155.1.0.2 255.255.255.0 encapsulation frame-relay ip ospf
> network
> broadcast serial restart-delay 0 no dce-terminal-timing-enable frame-relay
> map
> ip 155.1.0.5 205 broadcast no frame-relay inverse-arp!router ospf 1
> router-id
> 2.2.2.2 log-adjacency-changes network 155.1.23.2 0.0.0.0 area 0!router bgp
> 65002 no synchronization bgp log-neighbor-changes bgp confederation
> identifier
> 2 bgp confederation peers 65013 network 155.1.2.0 mask 255.255.255.0
> neighbor
> 155.1.0.5 remote-as 1 neighbor 155.1.23.3 remote-as 65013 no
> auto-summary--R5#
> interface Ethernet0/1 ip address 155.1.5.5 255.255.255.0!interface
> Serial1/0
> ip address 155.1.0.5 255.255.255.0 encapsulation frame-relay ip ospf
> network
> broadcast serial restart-delay 0 no dce-terminal-timing-enable frame-relay
> map
> ip 155.1.0.2 502 broadcast no frame-relay inverse-arp!router bgp 1 no
> synchronization bgp log-neighbor-changes network 155.1.5.0 mask
> 255.255.255.0
> neighbor 155.1.0.2 remote-as 2 no auto-summary
> ===r5# sh ip bgp
> Network Next Hop Metric LocPrf Weight Path*>
> 155.1.2.0/24 155.1.0.2 0 0 2 i*>
> 155.1.3.0/24
> 155.1.0.2 0 2 i*> 155.1.5.0/24 0.0.0.0
> 0 32768 i
> r5#ping 155.1.0.2 (**frame connection workin fine)
> Type escape sequence to abort.Sending 5, 100-byte ICMP Echos to 155.1.0.2,
> timeout is 2 seconds:!!!!!Success rate is 100 percent (5/5), round-trip
> min/avg/max = 40/68/120 ms
> --r5#ping 155.1.2.2 so e0/1 (** directly connected adv. netw working fine)
> Type escape sequence to abort.Sending 5, 100-byte ICMP Echos to 155.1.2.2,
> timeout is 2 seconds:Packet sent with a source address of
> 155.1.5.5!!!!!Success rate is 100 percent (5/5), round-trip min/avg/max =
> 32/64/92 ms
> --r5#ping 155.1.3.3 so e0/1
> Type escape sequence to abort.Sending 5, 100-byte ICMP Echos tPacket sent
> with
> a source addres.....Success rate is 0 percent (0/5)
>
> ***We would assume the problem is btw r2 & r3***
> R2#sh ip bgp
> Network Next Hop Metric LocPrf Weight Path*>
> 155.1.2.0/24 0.0.0.0 0 32768 i*> 155.1.3.0/24
> 155.1.23.3 0 100 0 (65013) i*> 155.1.5.0/24
> 155.1.0.5 0 0 1 i
> *> 155.1.5.0/24 155.1.0.5 0 0 1 i--r2#sh ip
> bgp
> su
> Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down
> State/PfxRcd155.1.0.5 4 1 84 86 5 0 0
> 01:19:10 1155.1.23.3 4 65013 84 84 5 0
> 0
> 01:18:34 2
>
> R2#ping 155.1.3.3 so fa0/0
> Type escape sequence to abort.Sending 5, 100-byte ICMP Echos to 155.1.3.3,
> timeout is 2 seconds:Packet sent with a source address of
> 155.1.2.2!!!!!Success rate is 100 percent (5/5), round-trip min/avg/max =
> 24/52/84 ms
> *****R3#clea ip bgp 155.1.2.2Debug on R3******Mar 1 04:00:51.003:
> %BGP-5-ADJCHANGE: neighbor 155.1.23.2 Up*Mar 1 04:00:51.019: BGP(0):
> 155.1.23.2 send UPDATE (format) 155.1.3.0/24, next 155.1.23.3, metric 0,
> path
> Local*Mar 1 04:00:51.023: BGP(0): 155.1.23.2 NEXT_HOP part 1 net
> 155.1.4.0/24, next155.1.13.1*Mar 1 04:00:51.027: BGP(0): 155.1.23.2 send
> UPDATE (format) 155.1.4.0/24, next 155.1.13.1, metric 0, path 3*Mar 1
> 04:00:51.047: BGP(0): 155.1.23.2 rcvd UPDATE w/ attr: nexthop 155.1.23.2,
> origin i, localpref 100, metric 0, path (65002)*Mar 1 04:00:51.055:
> BGP(0):
> 155.1.23.2 rcvd 155.1.2.0/24*Mar 1 04:00:51.063: BGP(0): 155.1.23.2 rcvd
> UPDATE w/ attr: nexthop 155.1.0.5, origin i, localpref 100, metric 0, path
> (65002) 1*Mar 1 04:00:51.071: BGP(0): 155.1.23.2 rcvd 155.1.5.0/24
> ******This shows R3 received the network 155.1.5.0/24. **No access list,
> community etc. has been configured***
>
> What other troubleshooting step do i take to enable me know y I'm unable
> to
> ping of trace this network.
> Regards
>
>
>
>
>
>
>
>
>
>
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>
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