From: uyota oyearone (spycharlies@hotmail.com)
Date: Wed Jan 16 2008 - 22:15:28 ARST
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
This archive was generated by hypermail 2.1.4 : Fri Feb 01 2008 - 10:38:00 ARST