[alcatel-nsp] iBGP-multipath configuration

[Raut, Devendra Y (Devendra)]

ibgp-multipath for VPN routes is a misnomer

VPN route's Nexthop resolution is controlled by individual VPRN configuration. On 7750, one can configure VPN NH resolution through LDP, RSVP, GRE or SDP (Service Distribution Point, which is basically statically configured Tunnel). So in order to have ibgp-multipath kind of behavior for VPN routes, you've to configure the 'resolving Tunnel' (LDP, RSVP or GRE) ECMP value.

-Deven



-----Original Message-----
From: alcatel-nsp-bounces at puck.nether.net [mailto:alcatel-nsp-bounces at puck.nether.net] On Behalf Of Ruslan Pustovoitov
Sent: Tuesday, April 27, 2010 5:57 AM
To: Pan vangels
Cc: alcatel-nsp at puck.nether.net
Subject: Re: [alcatel-nsp] iBGP-multipath configuration

This is not true, ALU support ibgp-multipath for ipv4-vprn family and ecmp work very well.


Pan vangels пишет:
> ibgp-multipath works only for core bgp routing instance v4/v6 routes, 
> not for vpn routes.
> you have to use ecmp in the vprn combined with different RDs being 
> advertised within the core.
>
>
>
> ------------------------------------------------------------------------
> Date: Tue, 27 Apr 2010 12:11:19 +0800
> From: luthfis_mail at yahoo.com
> To: alcatel-nsp at puck.nether.net
> Subject: [alcatel-nsp] iBGP-multipath configuration
>
> Dear All,
>
> Does anyone knows about ibgp-multipath configuration on 7750SR. The 
> idea is I want to load share VPRN traffic within MPBGP cloud, and 
> there are 2 objectives :
>
> a. All VPRN (VRFs) will use ibgp-multipath
> b. Only few VPRN (not all) will use ibgp-multipath
>
> I've tried using command ibgp-multipath on global context and ecmp 2 
> on service VPRN context but still cannot get load balance result.
> ------------------------------------------------------------------------------------
> A:ALu1>config>router>bgp#
> enable-peer-tracking
> family ipv4 vpn-ipv4
> ibgp-multipath
> group "test"
> type internal
> peer-as 65200
> neighbor 10.10.10.5
> description "isat-rr1-sr1"
> exit
> exit
> A:ALu1>config>service>vprn#
> vrf-import "import-vrf-test"
> vrf-export "export-vrf-test"
> ecmp 2
> autonomous-system 65200
> route-distinguisher 10.10.10.20:110
> auto-bind ldp
> interface "to_Router" create
> address 10.100.50.25/30
> sap 7/1/2:50 create
> exit
> exit
>
> A:ALu2>config>router>bgp#
> enable-peer-tracking
> family ipv4 vpn-ipv4
> ibgp-multipath
> group "test"
> type internal
> peer-as 65200
> neighbor 10.10.10.5
> description "isat-rr1-sr1"
> exit
> exit
> A:ALu2>config>service>vprn#
> vrf-import "import-vrf-test"
> vrf-export "export-vrf-test"
> ecmp 2
> autonomous-system 65200
> route-distinguisher 10.10.10.30:110
> auto-bind ldp
> interface "to_Router" create
> address 10.100.50.25/30
> sap 7/1/2:50 create
> exit
>
> Thanks in advance for any help :)
> exit
>
>
>
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