[c-nsp] BGP Advertised Prefixes

[Ahmed Hilmy]

 Hello Jason,
thanks for your reply, i know that it clear but why this is happened, the
filter has been set on both side identical.
Kindly, find below log,

# sh bgp neighbor x.x.x.x detail | i Prefix advertised

  Prefix advertised 2735, suppressed 0, withdrawn 1855, maximum limit 524288
#sh bgp neighbor  x.x.x.x advertised-routes

i count the number of advertised prefixes are only 215

Neighbor  x.x.x.x is my UP Link, Prefix list filter has been configured to
allow a specific prefixes to be announced.

What do you think ?



On Tue, Apr 9, 2013 at 11:21 PM, Jason Lixfeld <jason at lixfeld.ca> wrote:

> The message is pretty clear.  x.x.x.x is announcing more prefixes than
> what your max prefix setting is configured for.  Either the uplink side is
> misconfigured or your max prefix setting is too small.
>
> On 2013-04-09, at 4:13 PM, Ahmed Hilmy <hilmy.aa at gmail.com> wrote:
>
> > Dear Friends,
> >
> > Recently i have faced a strange issue, BGP session with my UP Links goes
> > down due this log at UP Link side:
> > ---------------------------------------------------
> >
> > RP/0/RSP0/CPU0:Apr  8 13:10:54.818 : bgp[1044]:
> %ROUTING-BGP-4-MAXPFXEXCEED
> > : No. of IPv4 Unicast prefixes received from x.x.x.x: 401 exceed limit
> 400
> >
> > RP/0/RSP0/CPU0:Apr  8 13:10:54.818 : bgp[1044]: %ROUTING-BGP-5-ADJCHANGE
> :
> > neighbor x.x.x.x Down - Peer exceeding maximum prefix limit (CEASE
> > notification sent - maximum n           umber of prefixes reached) (VRF:
> > default)
> >
> >
> > -------------------------------------------------------------
> >
> > # sh bgp neighbor x.x.x.x detail | i Prefix advertised
> >
> >  Prefix advertised 2735, suppressed 0, withdrawn 1855, maximum limit
> 524288
> > #sh bgp neighbor  x.x.x.x advertised-routes
> >
> > i count the number of advertised prefixes are only 215
> >
> > So what Prefix advertised 2735 does it mean ?
> > Why i faced this issue with my UP Links , it happened sometime , if i
> have
> > configured BGP filter in wrong way so i have to face this
> > issue continuously.
> >
> > Any suggest plan to check ?
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