From: Jorge Martinez (jorge_bgp@yahoo.com)
Date: Fri Dec 07 2007 - 18:48:17 ART
Are you authenticating the peering?
--- Gary Duncanson <gary.duncanson@googlemail.com>
wrote:
> Can you explain in a simple way what your problem
> actually is?
>
> EBGP sessions from SW2 to Juniper routers flapping?
> ----- Original Message -----
> From: "ccie ccie" <cciefun@gmail.com>
> To: "Cisco certification" <ccielab@groupstudy.com>
> Sent: Friday, December 07, 2007 5:42 PM
> Subject: Real world Scnario...Need Help...Lossing
> $$$
>
>
> > Hi Tech Lover,
> >
> >
> Juniper R1
> > Juniper J2
> <---- Connect to
> > BB
> > router as well as this router face the internet
> world.
> > |
> | / / \ \
> > | |
> <--- Each EBGP
> > session with hello 2 Hold 6 running on each
> physical link. OPSF is also
> > running on same link.
> > Server Iron LB ======= 6500 sw1
> ---ibgp---
> > 6500 sw2 ====Server Iron LB
> > |
> | / / \ \
> > | |
> <--- Physical
> > link are L2 port channel
> > 4948
> sw1 4948
> > sw2
> >
> >
> >
> > This is an scnario, where i need your help. We
> cant run EBGP on loopback
> > due to some architecturial concern. Problem with
> only EBGP session on core
> > sw2.
> >
> > Our EBGP session only on core switch 2 with
> Juniper 1 & 2 flap with few
> > irregular hours. IBGP session between core switch
> 1 & 2 never flap. We are
> > get hell lot of traffic. This site run multicast (
> but sure that could not
> > be problem) servers, web server, DB server etc.
> Core sw1 session are
> > always
> > stable. OSPF neighborship on both switch to
> Juniper BB router is up snce
> > more than 1 yrs.
> >
> > 1. BW on link is not high.
> > 2. CPU show 99% spike when BGP falp. CPU cause BGP
> flap i think so. ( I
> > dont
> > think BGP flap can cause of CPU spike.)
> > 3 Core switch is not having full BGP route.
> >
> > ( i tried to put ip nabr protocol-discover on EBGP
> link & session flap due
> > to me, i revert back in few sec to save my job)
> >
> > Suggest an troubleshooting step. As usual TAC is
> already open & CISCO
> > taking too much time.
> >
> > Regards,
> > Mike
> >
> >
>
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