From: Brian McGahan (bmcgahan@internetworkexpert.com)
Date: Thu Jan 04 2007 - 13:49:42 ART
Jay,
Technically this is an unsupported configuration so you'll see
some inconsistencies in the output. Inter-AS MDT only works in this way
if the PE routers servicing the VPN peer direct multihop EBGP VPNv4,
which is the case that you have. The new MDT address family removes
this restriction and is the "recommended" way to implement Inter-AS MDT.
HTH,
Brian McGahan, CCIE #8593 (R&S/SP)
bmcgahan@internetworkexpert.com
Internetwork Expert, Inc.
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> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
Of
> jay buss
> Sent: Thursday, January 04, 2007 5:39 AM
> To: ccielab@groupstudy.com
> Subject: INTER-AS mpls vpn --- PIM MDT understanding
>
> I am getting confused on the MDT topic, I was hoping one of you could
> clarify
> something for me..
>
> CE1---(vrf aaa)PE1(as1)--P--PE1(as1)--(as2)-PE2--P--PE(as2)(vrf
aaa)---CE2
>
> Assume no routing issues between CE1 and CE2 (full routing in
> between).I've
> configured MDT on PE1(as1) and PE1(as1) both in MDT default
> 239.1.1.1Please
> note that where in different AS-es.
> I've setup multicast so that "sparse-mode" run between AS1 and AS2
(as1 =
> static rp and as2=static rp).
>
> MSDP between the RP's from the different AS's is configured.
> CE1 = loopback 1.1.1.1 = statics RP for the multicast domain.CE2 =
> loopback
> 2.2.2.2 = uses loopback 1.1.1.1 (so static RP configured).I've
configured
> several ip igmp join statements on the loopbacks on the ce's.
> All statics rp configuration use the "override" keyword, so no
auto-rp,
> bsr
> issues.
> I can ping the multicast addresses from CE1 to CE2 and vice versa on
the
> configured igmp join groups, NO problem.. So basically you can say
that my
> INTER-domain mpls multicast works, without address-family MDT and
such..
> What I noticed, is the following: Normally when your in the same AS,
you
> can
> type the command "show ip pim mdt" and show ip pim mdt BGP".
> When I use the "show ip pim mdt BGP" command I do NOT get any output.
I've
> tried to setup EBGP vpnv4 sessions between the MDT PE's in the
different
> AS-es, with next-hop-unchanged, but still no output from the "show ip
pim
> mdt
> bgp" command, Is this a problem?
> What I basically would like to ask is, is the configuration I
described,
> since
> it's working, a good INTER-as mpls multicast setup. Or am I missing
> something
> since the MDT bgp command does not give any output??????????????????
>
> Thanks for your reply's ..
>
> Regards
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