[nsp] bgp & ds3

Sun Feb 16 00:22:17 EST 2003

Check the bug tools...I seem to recall a bug related to a flapping serial
interface that would take down a FE interface (and you BGP w/ it)

-Wayne Gustavus
    CCIE #7426

----- Original Message -----
From: "Joshua Smith" <joshua.ej.smith at usa.net>
To: <cisco-nsp at puck.nether.net>
Sent: Monday, February 03, 2003 11:16 AM
Subject: [nsp] bgp & ds3


> hello all
>
> i am encountering an odd issue - i have a 7513 with three BGP peers (one
> IBGP, two EBGP), the two EBGP sessions are on DS3 serial interfaces, the
> IBGP is on a fastethernet interface connected by crossover to my other
7513.
> the issue is that when one of the ds3 circuits goes down, all three bgp
> sessions drop with hold-time expired.  i am not sure if this is 'supposed'
> to happen, or if i have some hidden issue.  i know that the one session
> should drop, but i don't understand why the other two do.
>
> thanks
>
> joshua
> (sorry for the anonymization, but my employer prefers it)
>
> #sho ver
> Cisco Internetwork Operating System Software
> IOS (tm) RSP Software (RSP-IK9O3SV-M), Version 12.2(13)T,  RELEASE
SOFTWARE
> (fc1)
> TAC Support: http://www.cisco.com/tac
> Copyright (c) 1986-2002 by cisco Systems, Inc.
> Compiled Sat 16-Nov-02 00:33 by ccai
> Image text-base: 0x60010948, data-base: 0x61D5C000
>
> ROM: System Bootstrap, Version 12.0(10r)S1, RELEASE SOFTWARE (fc1)
>
> router uptime is 7 weeks, 3 days, 18 hours, 12 minutes
> System returned to ROM by reload at 16:37:18 EST Thu Dec 12 2002
> System restarted at 16:39:21 EST Thu Dec 12 2002
> System image file is "slot0:rsp-ik9o3sv-mz.122-13.T.bin"
>
> cisco RSP8 (R7000) processor with 262144K/8216K bytes of memory.
> R7000 CPU at 250Mhz, Implementation 39, Rev 2.1, 256KB L2, 2048KB L3 Cache
> Last reset from power-on
> G.703/E1 software, Version 1.0.
> G.703/JT2 software, Version 1.0.
> X.25 software, Version 3.0.0.
> Bridging software.
> Primary Rate ISDN software, Version 1.1.
> Chassis Interface.
> 3 VIP4-80 RM7000 controllers (1 FastEthernet)(4 Ethernet)(2 Serial)(2
> Channelized T3)(1 POS).
> 4 Ethernet/IEEE 802.3 interface(s)
> 1 FastEthernet/IEEE 802.3 interface(s)
> 5 Serial network interface(s)
> 1 Packet over SONET network interface(s)
> 2 Channelized T3 port(s)
> 2043K bytes of non-volatile configuration memory.
>
> 20480K bytes of Flash PCMCIA card at slot 0 (Sector size 128K).
> 32768K bytes of Flash PCMCIA card at slot 1 (Sector size 128K).
> 16384K bytes of Flash internal SIMM (Sector size 256K).
>
> Slave in slot 7 is running Cisco Internetwork Operating System Software
> IOS (tm) RSP Software (RSP-DW-M), Version 12.2(13)T,  RELEASE SOFTWARE
(fc1)
> TAC Support: http://www.cisco.com/tac
> Copyright (c) 1986-2002 by cisco Systems, Inc.
> Compiled Fri 15-Nov-02 21:45 by ccai
> Slave: Loaded from system
> Slave: cisco RSP8 (R7000) processor with 262144K bytes of memory.
>
> Configuration register is 0x2102
>
>
> my bgp config:
> router bgp my-AS
>  no synchronization
>  bgp router-id xxx.xxx.xxx.xxx
>  no bgp fast-external-fallover
>  bgp cluster-id 1079970877
>  bgp log-neighbor-changes
>  bgp bestpath scan-time 60
>  bgp scan-time 60
>  network xxx.xxx.xxx.xxx mask 255.255.252.0
>  redistribute connected
>  redistribute static
>  neighbor xxx.xxx.xxx.xxx remote-as my-AS
>  neighbor xxx.xxx.xxx.xxx update-source Loopback1978602
>  neighbor xxx.xxx.xxx.xxx version 4
>  neighbor xxx.xxx.xxx.xxx next-hop-self
>  neighbor xxx.xxx.xxx.xxx send-community
>  neighbor xxx.xxx.xxx.xxx soft-reconfiguration inbound
>  neighbor xxx.xxx.xxx.xxx prefix-list Block_Out out
>  neighbor nnn.nnn.nnn.nnn remote-as N
>  neighbor nnn.nnn.nnn.nnn description Direct to N
>  neighbor nnn.nnn.nnn.nnn version 4
>  neighbor nnn.nnn.nnn.nnn next-hop-self
>  neighbor nnn.nnn.nnn.nnn send-community
>  neighbor nnn.nnn.nnn.nnn remove-private-AS
>  neighbor nnn.nnn.nnn.nnn soft-reconfiguration inbound
>  neighbor nnn.nnn.nnn.nnn route-map FROM-N in
>  neighbor nnn.nnn.nnn.nnn route-map TO-N out
>  neighbor yyy.yyy.yyy.yyy remote-as Y
>  neighbor yyy.yyy.yyy.yyy description TO Y
>  neighbor yyy.yyy.yyy.yyy ebgp-multihop 3
>  neighbor yyy.yyy.yyy.yyy password mypassword
>  neighbor yyy.yyy.yyy.yyy update-source Loopback1978602
>  neighbor yyy.yyy.yyy.yyy version 4
>  neighbor yyy.yyy.yyy.yyy next-hop-self
>  neighbor yyy.yyy.yyy.yyy remove-private-AS
>  neighbor yyy.yyy.yyy.yyy soft-reconfiguration inbound
>  neighbor yyy.yyy.yyy.yyy prefix-list 100 out
>  neighbor nyyy.yyy.yyy.yyy route-map FROM-Y in
>  no auto-summary
>
> Feb  3 03:23:17.793 EST: %LINEPROTO-5-UPDOWN: Line protocol on Interface
> Serial1/0/0, changed state to down
> Feb  3 03:25:13.814 EST: %BGP-5-ADJCHANGE: neighbor nnn.nnn.nnn.nnn Down
> BGP Notification sent
> Feb  3 03:25:13.814 EST: %BGP-3-NOTIFICATION: sent to neighbor
> nnn.nnn.nnn.nnn 4/0 (hold time expired) 0 bytes
> Feb  3 03:26:50.591 EST: %BGP-5-ADJCHANGE: neighbor yyy.yyy.yyy.yyy.yyy
>  Down BGP Notification sent
> Feb  3 03:26:50.591 EST: %BGP-3-NOTIFICATION: sent to neighbor
> yyy.yyy.yyy.yyy 4/0 (hold time expired) 0 bytes
> Feb  3 03:34:22.384 EST: %BGP-5-ADJCHANGE: neighbor xxx.xxx.xxx.xxx Down
BGP
> Notification sent
> Feb  3 03:34:22.384 EST: %BGP-3-NOTIFICATION: sent to neighbor
> xxx.xxx.xxx.xxx 4/0 (hold time expired) 0 bytes
> Feb  3 03:41:07.444 EST: %LINEPROTO-5-UPDOWN: Line protocol on Interface
> Serial1/0/0, changed state to up
> Feb  3 03:42:29.013 EST: %BGP-5-ADJCHANGE: neighbor xxx.xxx.xxx.xxx Up
> Feb  3 03:42:44.753 EST: %BGP-5-ADJCHANGE: neighbor yyy.yyy.yyy.yyy Up
> Feb  3 03:55:02.105 EST: %BGP-5-ADJCHANGE: neighbor nnn.nnn.nnn.nnn Up
>
>
> "Walk with me through the Universe,
>  And along the way see how all of us are Connected.
>  Feast the eyes of your Soul,
>  On the Love that abounds.
>  In all places at once, seemingly endless,
>  Like your own existence."
>      - Stephen Hawking -
>
>
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