From: magmax (magmax@bigpond.net.au)
Date: Sat Feb 11 2006 - 03:28:17 GMT-3
Guys,
I am confused as to how this link is congested. If I turn off ospf bgp peer
goes up
Rack1R5(config)#no router ospf 1
Rack1R5(config)#
*Mar 2 13:25:34.194: %OSPF-5-ADJCHG: Process 1, Nbr 150.1.4.4 on
Ethernet0/1 from FULL to DOWN, Neighbor Down: Interface down or detached
Rack1R5(config)#^Z
Rack1R5#b
BGP router identifier 150.1.5.5, local AS number 400
BGP table version is 91, main routing table version 91
15 network entries using 1755 bytes of memory
30 path entries using 1560 bytes of memory
9/4 BGP path/bestpath attribute entries using 1116 bytes of memory
4 BGP AS-PATH entries using 112 bytes of memory
2 BGP community entries using 48 bytes of memory
0 BGP route-map cache entries using 0 bytes of memory
0 BGP filter-list cache entries using 0 bytes of memory
BGP using 4591 total bytes of memory
BGP activity 150/135 prefixes, 256/226 paths, scan interval 60 secs
Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down
State/PfxRcd
154.1.0.3 4 300 55 207 91 0 0 00:00:00 15
154.1.45.4 4 400 405 359 91 0 0 00:13:08 15
Rack1R5#
*Mar 2 13:25:40.470: %SYS-5-CONFIG_I: Configured from console by console
*Mar 2 13:25:40.790: %BGP-5-ADJCHANGE: neighbor 154.1.0.3 Up
Rack1R5#sh ip pro
Routing Protocol is "bgp 400"
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
IGP synchronization is disabled
Automatic route summarization is disabled
Neighbor(s):
Address FiltIn FiltOut DistIn DistOut Weight RouteMap
154.1.0.3
154.1.45.4
Maximum path: 1
Routing Information Sources:
Gateway Distance Last Update
154.1.0.3 20 00:00:12
154.1.45.4 200 00:00:19
Distance: external 20 internal 200 local 200
Rack1R5#
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
magmax
Sent: Saturday, 11 February 2006 1:10 PM
To: comserv@groupstudy.com; 'R&S CCIE GroupStudy'
Subject: RE: BGP Neighbors down - help...i am going nuts with this
Found the answer someone link was congested.. Only other things running on
the link was ospf
_____
From: magmax [mailto:magmax@bigpond.net.au]
Sent: Saturday, 11 February 2006 12:57 PM
To: 'R&S CCIE GroupStudy'
Subject: BGP Neighbors down - help...i am going nuts with this
Guys,
Can anyone tell me why this BGP peer is failing?
Topology
R5 ---R3 -------R4
p.s
I don't see any issues when peering with R4 from R3 (exact same config)
router bgp 300
no synchronization
bgp router-id 150.1.3.3
bgp log-neighbor-changes
neighbor 154.1.0.5 remote-as 400
neighbor 154.1.0.5 send-community
no auto-summary
Rack1R3#ping 154.1.0.5 repeat 10
Type escape sequence to abort.
Sending 10, 100-byte ICMP Echos to 154.1.0.5, timeout is 2 seconds:
!!!!!!!!!!
Success rate is 100 percent (10/10), round-trip min/avg/max = 56/59/60 ms
Rack1R3#
Rack1R5#sh run | begin router bgp
router bgp 400
no synchronization
bgp router-id 150.1.5.5
bgp log-neighbor-changes
neighbor 154.1.0.3 remote-as 300
neighbor 154.1.0.3 send-community
no auto-summary
Debug output on R3!
*Mar 4 16:42:03.695: TCP0: FIN processed
*Mar 4 16:42:03.695: TCP0: state was FINWAIT1 -> CLOSING [179 ->
154.1.0.5(5294
5)]
*Mar 4 16:42:04.267: BGP: 154.1.0.5 went from Idle to Active
*Mar 4 16:42:04.267: BGP: 154.1.0.5 open active delayed 31629ms (35000ms
max, 2
8% jitter)
Rack1R3#
*Mar 4 16:42:20.259: TCP: sending RST, seq 0, ack 4070132017
*Mar 4 16:42:20.259: TCP: sent RST to 154.1.0.4:64767 from 154.1.0.3:179
Rack1R3#
*Mar 4 16:42:32.575: TCB65594E34 created
*Mar 4 16:42:32.575: TCP0: state was LISTEN -> SYNRCVD [179 ->
154.1.0.5(58110)]
*Mar 4 16:42:32.575: TCP: tcb 65594E34 connection to 154.1.0.5:58110, peer
MSS 1460, MSS is 516
*Mar 4 16:42:32.579: TCP: sending SYN, seq 533987964, ack 2126158377
*Mar 4 16:42:32.579: TCP0: Connection to 154.1.0.5:58110, advertising MSS
1460
*Mar 4 16:42:32.611: TCP0: state was SYNRCVD -> ESTAB [179 ->
154.1.0.5(58110)]
*Mar 4 16:42:32.611: TCB653A5B70 callback, connection queue = 1
*Mar 4 16:42:32.611: TCB653A5B70 accepting 65594E34 from 154.1.0.5.58110
*Mar 4 16:42:32.615: BGP: 154.1.0.5 passive open to 154.1.0.3
*Mar 4 16:42:32.615: BGP: 154.1.0.5 went from Active to Idle
*Mar 4 16:42:32.615: BGP: 154.1.0.5 went from Idle to Connect
*Mar 4 16:42:32.627: BGP: 154.1.0.5 rcv message type 1, length (excl.
header) 26
*Mar 4 16:42:32.627: BGP: 154.1.0.5 rcv OPEN, version 4, holdtime 180
seconds
*Mar 4 16:42:32.627: BGP: 154.1.0.5 went fr
Rack1R3#om Connect to OpenSent
*Mar 4 16:42:32.631: BGP: 154.1.0.5 sending OPEN, version 4, my as: 300,
holdtime 180 seconds
*Mar 4 16:42:32.631: BGP: 154.1.0.5 rcv OPEN w/ OPTION parameter len: 16
*Mar 4 16:42:32.631: BGP: 154.1.0.5 rcvd OPEN w/ optional parameter type 2
(Capability) len 6
*Mar 4 16:42:32.631: BGP: 154.1.0.5 OPEN has CAPABILITY code: 1, length 4
*Mar 4 16:42:32.631: BGP: 154.1.0.5 OPEN has MP_EXT CAP for afi/safi: 1/1
*Mar 4 16:42:32.631: BGP: 154.1.0.5 rcvd OPEN w/ optional parameter type 2
(Capability) len 2
*Mar 4 16:42:32.631: BGP: 154.1.0.5 OPEN has CAPABILITY code: 128, length 0
*Mar 4 16:42:32.631: BGP: 154.1.0.5 OPEN has ROUTE-REFRESH capability(old)
for all address-families
*Mar 4 16:42:32.631: BGP: 154.1.0.5 rcvd OPEN w/ optional parameter type 2
(Capability) len 2
*Mar 4 16:42:32.631: BGP: 154.1.0.5 OPEN has CAPABILITY code: 2, length 0
*Mar 4 16:42:32.631: BGP: 154.1.0.5 OPEN has ROUTE-REFRESH capability(new)
for all address-families
BGP: 154.1.0.5 rcvd OPEN w/ remote AS 400
*Mar 4 16:42:32.635: BGP: 154.1.0.5 went from OpenSent to OpenConfirm
*Mar 4 16:42:32.635: BGP: 154.1.0.5 send message type 1, length (incl.
header) 45
Rack1R3#
Rack1R3#
*Mar 4 16:42:34.463: TCP0: bad seg from 154.1.0.5 -- outside window: port
179 seq 2126158377 ack 533987965 rcvnxt 2126158422 rcvwnd 16339 len 45
*Mar 4 16:42:34.475: 154.1.0.3:179 <---> 154.1.0.5:58110 congestion
window changes
*Mar 4 16:42:34.475: cwnd from 1461 to 1460, ssthresh from 65535 to 2920
*Mar 4 16:42:34.475: TCP0: timeout #1 - timeout is 3674 ms, seq 533987965
*Mar 4 16:42:34.475: TCP: (179) -> 154.1.0.5(58110)
Rack1R3#
*Mar 4 16:42:38.139: TCP0: bad seg from 154.1.0.5 -- outside window: port
179 seq 2126158377 ack 533987965 rcvnxt 2126158422 rcvwnd 16339 len 45
*Mar 4 16:42:38.151: TCP0: timeout #2 - timeout is 7348 ms, seq 533987965
*Mar 4 16:42:38.151: TCP: (179) -> 154.1.0.5(58110)
Rack1R3#
*Mar 4 16:42:45.487: TCP0: bad seg from 154.1.0.5 -- outside window: port
179 seq 2126158377 ack 533987965 rcvnxt 2126158422 rcvwnd 16339 len 45
*Mar 4 16:42:45.499: TCP0: timeout #3 - timeout is 14696 ms, seq 533987965
*Mar 4 16:42:45.499: TCP: (179) -> 154.1.0.5(58110)
Rack1R3#
*Mar 4 16:42:47.983: TCP: sending RST, seq 0, ack 1719142085
*Mar 4 16:42:47.983: TCP: sent RST to 154.1.0.4:23273 from 154.1.0.3:179
*Mar 4 16:42:48.643: TCP0: state was CLOSING -> CLOSED [179 ->
154.1.0.5(19509)]
*Mar 4 16:42:48.643: TCB 0x655897D8 destroyed
Rack1R3#
*Mar 4 16:42:50.743: TCP: sending RST, seq 0, ack 653177199
*Mar 4 16:42:50.743: TCP: sent RST to 154.1.38.8:11002 from 154.1.38.3:179
Rack1R3#
*Mar 4 16:42:55.459: TCP0: bad seg from 154.1.0.5 -- outside window: port
179 seq 445911247 ack 1084204555 rcvnxt 445911314 rcvwnd 16318 len 66
*Mar 4 16:42:55.467: TCP0: Data repacketized, seq 1084204555, sent 85 byte
*Mar 4 16:42:55.467: TCP0: timeout #8 - timeout is 58784 ms, seq 1084204555
*Mar 4 16:42:55.467: TCP: (179) -> 154.1.0.5(52945)
Rack1R3#
*Mar 4 16:43:00.183: TCP0: bad seg from 154.1.0.5 -- outside window: port
179 seq 2126158377 ack 533987965 rcvnxt 2126158422 rcvwnd 16339 len 45
*Mar 4 16:43:00.195: TCP0: timeout #4 - timeout is 29392 ms, seq 533987965
*Mar 4 16:43:00.195: TCP: (179) -> 154.1.0.5(58110)
Rack1R3#
*Mar 4 16:43:06.271: TCP: sending RST, seq 0, ack 3448371264
*Mar 4 16:43:06.271: TCP: sent RST to 154.1.23.2:11005 from 154.1.23.3:179
Rack1R3#
*Mar 4 16:43:08.087: TCP: sending RST, seq 0, ack 1002150223
*Mar 4 16:43:08.087: TCP: sent RST to 154.1.13.1:11004 from 154.1.13.3:179
Debug on R5
Rack1R5#CLEAR IP BGp 154.1.0.3
Rack1R5#
*Mar 2 08:48:40.995: BGPNSF state: 154.1.0.3 went from nsf_not_active to
nsf_not_active
*Mar 2 08:48:40.995: BGP: 154.1.0.3 went from Active to Idle
*Mar 2 08:48:40.995: BGP: 154.1.0.3 went from Idle to Active
*Mar 2 08:48:40.999: BGP: 154.1.0.3 open active delayed 34673ms (35000ms
max, 28% jitter)
Rack1R5#
*Mar 2 08:48:55.123: TCP0: timeout #9 - timeout is 58784 ms, seq 3145414371
*Mar 2 08:48:55.123: TCP: (11535) -> 154.1.0.3(179)
Rack1R5#
*Mar 2 08:49:04.739: TCP0: Data repacketized, seq 2328410389, sent 66 byte
*Mar 2 08:49:04.739: TCP0: timeout #8 - timeout is 58784 ms, seq 2328410389
*Mar 2 08:49:04.739: TCP: (61744) -> 154.1.0.3(179)
Rack1R5#
*Mar 2 08:49:15.675: BGP: 154.1.0.3 open active, local address 154.1.0.5
*Mar 2 08:49:15.675: TCB644AE918 created
*Mar 2 08:49:15.675: TCB644AE918 setting property TCP_WINDOW_SIZE (0)
6551FDC4
*Mar 2 08:49:15.675: TCB644AE918 setting property TCP_MD5KEY (5) 0
*Mar 2 08:49:15.675: TCB644AE918 setting property TCP_TOS (11) 6551FDB0
*Mar 2 08:49:15.675: TCP: Random local port generated 19138
*Mar 2 08:49:15.675: TCB644AE918 bound to 154.1.0.5.19138
*Mar 2 08:49:15.679: TCP: sending SYN, seq 738426187, ack 0
*Mar 2 08:49:15.679: TCP0: Connection to 154.1.0.3:179, advertising MSS
1460
*Mar 2 08:49:15.679: TCP0: state was CLOSED -> SYNSENT [19138 ->
154.1.0.3(179)]
Rack1R5#
*Mar 2 08:49:15.711: TCP0: state was SYNSENT -> ESTAB [19138 ->
154.1.0.3(179)]
*Mar 2 08:49:15.711: TCP: tcb 644AE918 connection to 154.1.0.3:179, peer
MSS 1460, MSS is 1460
*Mar 2 08:49:15.711: TCB644AE918 connected to 154.1.0.3.179
*Mar 2 08:49:15.715: BGP: 154.1.0.3 went from Active to OpenSent
*Mar 2 08:49:15.715: BGP: 154.1.0.3 sending OPEN, version 4, my as: 400,
holdtime 180 seconds
*Mar 2 08:49:15.715: BGP: 154.1.0.3 send message type 1, length (incl.
header) 45
Rack1R5#
*Mar 2 08:49:17.559: 154.1.0.5:19138 <---> 154.1.0.3:179 congestion
window changes
*Mar 2 08:49:17.559: cwnd from 1460 to 1460, ssthresh from 65535 to 2920
*Mar 2 08:49:17.559: TCP0: timeout #1 - timeout is 3674 ms, seq 738426188
*Mar 2 08:49:17.559: TCP: (19138) -> 154.1.0.3(179)
Rack1R5#
*Mar 2 08:49:21.235: TCP0: timeout #2 - timeout is 7348 ms, seq 738426188
*Mar 2 08:49:21.235: TCP: (19138) -> 154.1.0.3(179)
Rack1R5#
*Mar 2 08:49:28.583: TCP0: timeout #3 - timeout is 14696 ms, seq 738426188
*Mar 2 08:49:28.583: TCP: (19138) -> 154.1.0.3(179)
Rack1R5#
*Mar 2 08:49:43.279: TCP0: timeout #4 - timeout is 29392 ms, seq 738426188
*Mar 2 08:49:43.279: TCP: (19138) -> 154.1.0.3(179)
Rack1R5#
*Mar 2 08:49:53.907: TCP0: timeout #10 - timeout is 58784 ms, seq
3145414371
*Mar 2 08:49:53.907: TCP: (11535) -> 154.1.0.3(179)
Rack1R5#
*Mar 2 08:50:03.523: TCP0: timeout #9 - timeout is 58784 ms, seq 2328410389
*Mar 2 08:50:03.523: TCP: (61744) -> 154.1.0.3(179)
Rack1R5#
*Mar 2 08:50:12.671: TCP0: timeout #5 - timeout is 58784 ms, seq 738426188
*Mar 2 08:50:12.671: TCP: (19138) -> 154.1.0.3(179)
Rack1R5#sh running-config interface serial 0/0
Building configuration...
Current configuration : 288 bytes
!
interface Serial0/0
ip address 154.1.0.5 255.255.255.0
encapsulation frame-relay
ip ospf network point-to-multipoint non-broadcast
ip ospf priority 0
no dce-terminal-timing-enable
frame-relay map ip 154.1.0.3 503
frame-relay map ip 154.1.0.4 503
no frame-relay inverse-arp
end
Rack1R3#sh running-config interface serial 0/0
Building configuration...
Current configuration : 268 bytes
!
interface Serial0/0
ip address 154.1.0.3 255.255.255.0
encapsulation frame-relay
ip ospf network point-to-multipoint non-broadcast
no dce-terminal-timing-enable
frame-relay map ip 154.1.0.4 304
frame-relay map ip 154.1.0.5 305
no frame-relay inverse-arp
end
Max
This archive was generated by hypermail 2.1.4 : Wed Mar 01 2006 - 11:28:17 GMT-3