Re: BGP MDT

Please find the configuration:-

vrf definition CUST
 rd 100:100
 !
 address-family ipv4
 route-target export 100:100
 route-target import 100:100
 route-target import 1001:100
 mdt default 239.255.2.10

 exit-address-family
 !
 address-family ipv6
 route-target export 100:100
 route-target import 100:100
 route-target import 1001:100
 exit-address-family

=============
router bgp 100
 no bgp default ipv4-unicast
 bgp log-neighbor-changes
 neighbor 2.2.2.2 remote-as 100
 neighbor 2.2.2.2 update-source Loopback0
 neighbor 5.5.5.5 remote-as 100
 neighbor 5.5.5.5 update-source Loopback0

 !
 address-family ipv4
  no synchronization
  network 8.8.8.8 mask 255.255.255.255
  neighbor 2.2.2.2 activate
  neighbor 5.5.5.5 activate
  no auto-summary
 exit-address-family
 !
 address-family vpnv4
  neighbor 2.2.2.2 activate
  neighbor 2.2.2.2 send-community extended
 exit-address-family
 !
 address-family ipv4 mdt
  neighbor 5.5.5.5 activate
  neighbor 5.5.5.5 send-community extended
 exit-address-family

This is the config after removing the neighbor under mdt.Also, the IOS
version is "12.2(33)SRE2".

Cheers,
Nikhil E.

On Tue, Jun 26, 2012 at 10:27 PM, Brian McGahan <bmcgahan_at_ine.com> wrote:

> That's only for versions that are pre-standard, and also only if you have
> the VRF locally configured, and only if you have the default MDT configured
> under the VRF. If you want to explicitly disable it then upgrade to a
> version that supports the standardized BGP AFI/SAFI for IPv4 MDT.
>
> Post your config and relevant show outputs if you're having trouble with a
> specific design and I'd be more than happy to help.
>
> HTH,
>
> Brian McGahan, CCIE #8593 (R&S/SP/Security)
> bmcgahan_at_INE.com
>
> Internetwork Expert, Inc.
> http://www.INE.com
>
> On Jun 26, 2012, at 10:27 AM, "Nicky" <ccienovice_at_gmail.com> wrote:
>
>
> This not a bug but IOS operation itself. Kindly go through the excerpt
> from the link shared by Brian:-
>
> "*when a default MDT configuration exists and a VPNv4 neighbor in BGP is
> configured, a similar neighbor in the IPv4 MDT address family will be
> automatically configured.*"
>
> Cheers,
> Nicky
>
> On Tue, Jun 26, 2012 at 8:46 PM, Roger Pfaeffli <rpf23543_at_gmail.com>wrote:
>
>> If you remove the neighbor from the mdt address family and it still
>> appears in the config under the address family, it seems to be a bug. There
>> is nothing like the "no bgp default ipv4 unicast". Like Brian said, if you
>> completely want to remove The functionality" just delete the address-family
>> ipv4 mdt.
>>
>> Regards
>>
>> Roger #23543
>>
>> Sent from my iPhone
>>
>> On 26.06.2012, at 14:22, Nicky <ccienovice_at_gmail.com> wrote:
>>
>> > Hi Brian,
>> >
>> > Kindly ignore the first sentence and please do let me know if there is
>> any
>> > command similar to "no bgp default ipv4-unicast" to disable this MDT
>> SAFI
>> > functionality.
>> >
>> > Cheers,
>> > Nicky
>> >
>> > On Tue, Jun 26, 2012 at 5:47 PM, Nicky <ccienovice_at_gmail.com> wrote:
>> >
>> >> Hi Brian,
>> >>
>> >> Even if use the command no neighbor and reload the router the
>> >> configuration reappears. Is there any command same as "no bgp default
>> >> ipv4-unicast"?
>> >>
>> >> Cheers,
>> >> Nicky
>> >>
>> >>
>> >> On Tue, Jun 26, 2012 at 5:00 PM, Brian McGahan <bmcgahan_at_ine.com>
>> wrote:
>> >>
>> >>> MDT BGP neighbors don't get activated by default. Just like any other
>> >>> AFI/SAFI in BGP, e.g. VPNv4, VPNv6, etc. you have to enable it
>> manually.
>> >>> You would need to add the "neighbor w.x.y.z activate" command under
>> the
>> >>> address-family ipv4 mdt.
>> >>>
>> >>> For versions that a pre-standard for BGP MDT SAFI, your VPNv4 peers
>> will
>> >>> also be your MDT peers. If you migrate to a newer version that
>> supports
>> >>> the BGP MDT standard it will automatically activate these peers under
>> MDT
>> >>> in addition to their VPNv4 configuration:
>> >>>
>> >>>
>> >>>
>> http://www.cisco.com/en/US/docs/ios/12_2s/feature/guide/fs_mvpn.html#wp1116841
>> >>>
>> >>> If you want to remove a peer though you simply need to say "no
>> neighbor
>> >>> w.x.y.z activate" under address-family ipv4 mdt.
>> >>>
>> >>>
>> >>> HTH,
>> >>>
>> >>> Brian McGahan, CCIE #8593 (R&S/SP/Security)
>> >>> bmcgahan_at_INE.com
>> >>>
>> >>> Internetwork Expert, Inc.
>> >>> http://www.INE.com
>> >>>
>> >>> -----Original Message-----
>> >>> From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf
>> Of
>> >>> Nicky
>> >>> Sent: Tuesday, June 26, 2012 5:58 AM
>> >>> To: ccielab_at_groupstudy.com
>> >>> Subject: BGP MDT
>> >>>
>> >>> Hi All,
>> >>>
>> >>> By default the neighbors get activated under address family ipv4 mdt.
>> >>>
>> >>> Is there any command to disable the default activation.
>> >>>
>> >>> Thanks & Regards,
>> >>> Nicky
>> >>>
>> >>>
>> >>> Blogs and organic groups at http://www.ccie.net
>> >>>
>> >>>
>> _______________________________________________________________________
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>> >
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Received on Wed Jun 27 2012 - 08:03:08 ART