03-06-2012 09:09 AM
We are attempting to enable multicast within our Hub and Spoke MPLS network!!!
:
Since this is a Hub and Spoke environment, we have 2 VRFs per Hub, I.E. Ingress VRF and Egress VRF.
We have 2 Hubs and about 300 Spokes.
:
Some remote PEs peer with 2 different CE spokes and the 2 spokes must exist in different VRFs (it just sucks that the same PE terminates these spokes but this is how it is).
:
I have enabled MDT default group under the 1st VRF but when I attempt to enable the same MDT default group under the 2nd VRF I receive the following error:
PE3(config)#vrf definition REG3
PE3(config-vrf)#address-family ipv4
PE3(config-vrf-af)#mdt default 239.232.0.0
PE3(config-vrf-af)#
PE3(config)#vrf definition REG4
PE3(config-vrf)#address-family ipv4
PE3(config-vrf-af)#mdt default 239.232.0.0
% MDT-default group 239.232.0.0 overlaps with vrf REG3
PE3(config-vrf-af)#
Here is the VRF config-let for PE3:
vrf definition REG3
description WAN3 to WAN1 & WAN2 [Hub & Spoke]
rd 30:1020
!
address-family ipv4
import map WAN2
mdt default 239.232.0.0
route-target export 30:30
route-target import 10:10
route-target import 20:20
exit-address-family
!
address-family ipv6
import map WAN2V6
route-target export 30:30
route-target import 20:20
route-target import 10:10
exit-address-family
!
vrf definition REG4
description WAN4 to WAN1 & WAN2 [Hub & Spoke]
rd 40:1020
!
address-family ipv4
import map WAN1
route-target export 40:40
route-target import 10:10
route-target import 20:20
exit-address-family
!
address-family ipv6
import map WAN1V6
route-target export 40:40
route-target import 20:20
route-target import 10:10
exit-address-family
QUESTIONS:
Bearing in mind that ALL traffic between spokes MUST pass through a primary HUB for security purposes
1. Since some spokes (DS3 or larger link) will source multicast traffic for Video Teleconference (VTC) is there a special configuration I need on the Spokes . . . Meaning should I have multiple GRE Multipoint tunnels within between PEs via multiple MDT groups?
2. Is there a special configuration I need for the HUBs for Ingress VRFs verses Egress VRFs?
BTW, multicast traffic does flow to spoke VRF REG3 --- through the MPLS cloud -- from the Hub.
Thanks for any assistance!!
Regards Frank
03-07-2012 11:39 AM
Ok, I waited and waited and waited and waited some more . . . all the while researching anything that was closely related to multicast in a hub and spoke environment - I only found my own questions I posted here earlier!
:
Long story short, I figured it out (I should get 5 stars!!!!!)
Thanks for at least looking.
Before you pull all your hair out, reply here if you need assistance as I can provide what I know!!!
All the Best
Frank
03-10-2012 04:31 AM
H Frank,
Glad to hear that you solved the problem yourself. Sometimes, ppl here get so busy that its hard for them to come on CSC. I am sure you understand that yourself.
Please post the solution here so that everyone can benefit from it. I will give you the 5+ stars you deserve in green
Regards, Kishore
03-15-2012 11:30 AM
Hey Kishore,
Yea I understand folks are busy - always.
You being and MPLS hub and spoke engineer, you probably already know all this stuff - I am VERY new to MPLS; just learned the basics two months ago.
:
Anyway, long story short, could you tell me how many VRF's are required per PE-CE peering session for a redundant multicast enabled MPLS hub and spoke environment?
:
Meaning, if I am the customer (CE) and only have a single router per site and a single interface per router and I want my CE sites to have multicast logical failover, is there something special I need to do to make this happen?
:
Thanks so much!!
Frank
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