[c-nsp] BGP Advertised Prefixes

[Ahmed Hilmy]

Hi Blake,


for outbound prefixes, i am using prefix-list filter which is identical at
my side and UP Link side.
for inbound prefixes , i have set max-prefix at maximum value because i am
receiving full BGP table from my UP Link.
entities of prefix-list has configured in this form x.x.x.x/y le 24, it
might be many prefixes are passed within this range.
But this issue is happen sometime, really strange.


On Tue, Apr 9, 2013 at 11:28 PM, Blake Dunlap <ikiris at gmail.com> wrote:

> Are you counting on summarization to limit your feed, or are you
> restricting the announcements themselves? Without your actual config it's
> hard to guess what is going on here...
>
> -Blake
>
>
> On Tue, Apr 9, 2013 at 3:13 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   Prefix advertised 2735, suppressed 0, withdrawn 1855, maximum limit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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>
>