Re: BGP Peer Group Problem

Mark,
If in doubt, you can always lab it up with GNS3 :-)

Cheers
A.

On 2/16/2014 10:59 PM, Joe Sanchez wrote:
> Mark,
>
> To answer you questions:
>
> Q: Is it possible that a peer group can be configured
> without an AS-Number?
>
> A: You can create a peer-group without specifying a AS within that
> peer-group.
>
> For instance the below peer-group is applied on a single customer router
> connected to 2 external bhp peers, but if I wanted to apply a single
> distribute-list I could create a peer-group called external and apply that
> group to each of my peering statements, however each peer has a separate
> ASN therefore I could not apply a single ASN 3remote-as2 to the group.
> _____________________________________________________
> router bgp 1
> !
> neighbor external peer-group
> !
> neighbor 172.16.10.2 remote-as 2
> !
> neighbor 172.16.9.2 remote-as 3
> !
> neighbor 172.16.10.2 peer-group external
> neighbor 172.16.9.2 peer-group external
> neighbor external distribute-list 2 out
> _____________________________________________________
>
> Q: Or it is just a junk without any effect?
>
>
> A: Not unless you forget to put the neighbor command with the remote-as on
> a separate statement.
> I.e. Neighbor x.x.x.x remote-as xx
>
> I9m not really sure your actual syntax will work depending on what you are
> trying to accomplish, but if you have a look at the above example it
> should provide you a starting point.
>
>
> Best Regards,
> Joe Sanchez
>
>
>
>
>
>
> On 2/16/14, 3:33 PM, "Mark Szwed" <szwarowski_at_gmail.com> wrote:
>
>> Colleagues ,
>>
>> I have a question regarding BGP peer groups , I have a router configured
>> by
>> my workmate .
>> The only issue I have is I don't see a remote-as defined for this
>> particular group ,is it possible that a peer group can be configured
>> without an AS-Number or it is just a junk without any effect :
>>
>> Will the below configuration work in any way without an as-number assigned
>> to YYYYY peer group ?
>>
>> and if not does that mean the the prefix-list ,route-map and maximum
>> prefix-list configured useless and thus just unecessary configs ?
>>
>>
>> router bgp 100
>> bgp router-id {c.c.c.c}
>> neighbor YYYYY peer-group
>> neighbor YYYYY description +++ send full routes ++
>> neighbor YYYYY version 4
>> !
>> address-family ipv4
>> neighbor YYYYY activate
>> neighbor YYYYY send-community
>> neighbor YYYYY remove-private-as
>> neighbor YYYYY prefix-list send_toXXX out
>> neighbor YYYYY route-map IN_HHH in
>> neighbor YYYYY route-map OUT_HHH out
>> neighbor YYYYY maximum-prefix 20
>> no auto-summary
>> no synchronization
>>
>> thank you
>>
>>
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Received on Sun Feb 16 2014 - 23:17:56 ART