From: Michael Zuo (mzuo@ixiacom.com)
Date: Mon Feb 26 2007 - 23:12:07 ART
Yup, that was a "I can't believe I didn't notice this" thing :)
-----Original Message-----
From: Edison Ortiz [mailto:edisonmortiz@gmail.com]
Sent: Sunday, February 25, 2007 7:55 AM
To: Michael Zuo; ccielab@groupstudy.com
Subject: Re: synchronization not working...
Synchronization only affects iBGP peers. With eBGP configuration as
yours, routes will be advertised as normal regardless the sync status.
----- Original Message -----
From: "Michael Zuo" <mzuo@ixiacom.com>
To: <ccielab@groupstudy.com>
Sent: Saturday, February 24, 2007 9:49 PM
Subject: synchronization not working...
> hi Group,
>
> ran into a strange problem:
>
> R4----R1----R2
>
> R1: synchronization on
> R2: synchronization on
> R4: synchronization off
>
>
> for some reason R1 advertises network 10.10.10.0 to R2 even it has no
> IGP protocol running!! must be something simple but my brian is full
and
> couldn't figure it out...
>
> anyone out there has an idea? thanks a lot...
>
>
> R1:
>
> shutdown
> serial restart-delay 0
> no dce-terminal-timing-enable
> !
> interface Serial1/3
> no ip address
> shutdown
> serial restart-delay 0
> no dce-terminal-timing-enable
> !
> router bgp 100
> synchronization
> bgp log-neighbor-changes
> neighbor 150.1.12.2 remote-as 300
> neighbor 150.1.14.4 remote-as 200
> no auto-summary
> !
> no ip http server
> ip classless
>
>
> Rack1R1(config-router)#do sh ip bg
> BGP table version is 2, local router ID is 150.1.14.1
> Status codes: s suppressed, d damped, h history, * valid, > best, i -
> internal,
> r RIB-failure, S Stale
> Origin codes: i - IGP, e - EGP, ? - incomplete
>
> Network Next Hop Metric LocPrf Weight Path
> *> 10.10.10.0/24 150.1.14.4 0 0 200 ?
> Rack1R1(config-router)#do sh ip bg 10.10.10.0
> BGP routing table entry for 10.10.10.0/24, version 2
> Paths: (1 available, best #1, table Default-IP-Routing-Table)
> Advertised to update-groups:
> 2
> 200
> 150.1.14.4 from 150.1.14.4 (10.10.10.1)
> Origin incomplete, metric 0, localpref 100, valid, external, best
> Rack1R1(config-router)#
> Rack1R1(config-router)#do sh ip bg nei 150.1.12.2 ad
> BGP table version is 2, local router ID is 150.1.14.1
> Status codes: s suppressed, d damped, h history, * valid, > best, i -
> internal,
> r RIB-failure, S Stale
> Origin codes: i - IGP, e - EGP, ? - incomplete
>
> Network Next Hop Metric LocPrf Weight Path
> *> 10.10.10.0/24 150.1.14.4 0 0 200 ?
>
> Total number of prefixes 1
> Rack1R1(config-router)#
>
>
> R2:
>
> !
> interface Serial1/3
> no ip address
> shutdown
> serial restart-delay 0
> no dce-terminal-timing-enable
> !
> router bgp 300
> synchronization
> bgp log-neighbor-changes
> neighbor 150.1.12.1 remote-as 100
> no auto-summary
> !
> no ip http server
> ip classless
> !
> !
>
> Rack1R2(config)#do sh ip bg
> BGP table version is 4, local router ID is 150.1.23.2
> Status codes: s suppressed, d damped, h history, * valid, > best, i -
> internal,
> r RIB-failure, S Stale
> Origin codes: i - IGP, e - EGP, ? - incomplete
>
> Network Next Hop Metric LocPrf Weight Path
> *> 10.10.10.0/24 150.1.12.1 0 100 200 ?
> Rack1R2(config)#do sh ip bg 10.10.10.0
> BGP routing table entry for 10.10.10.0/24, version 4
> Paths: (1 available, best #1, table Default-IP-Routing-Table)
> Not advertised to any peer
> 100 200
> 150.1.12.1 from 150.1.12.1 (150.1.14.1)
> Origin incomplete, localpref 100, valid, external, best
> Rack1R2(config)#
>
>
This archive was generated by hypermail 2.1.4 : Thu Mar 01 2007 - 07:38:48 ART