[c-nsp] PIM Split Rules and Multicast over L3 MPLS VPN

alaerte.vidali at nsn.com alaerte.vidali at nsn.com
Tue Jan 22 12:09:24 EST 2008


Hi,

PIM considers source of multicast to perform load splitting when the
command "ip multicast multipath" is entered. When using multicast over
L3 MPLS VPN, the source IP is the IP of PEx for any customer group
connected to PEx.
Any way to overcome this limitation and achieve load splitting of
multicast over L3 MPLS VPN?

For example, consider this scenario:

 Sender for group G1 and
G2---CE1-----PE1------P1-----PE2----CE2----receiver of G1 and G2
                                       |               |
                                       |_______P2______| 

The goal is having one G1 taking path PE1--P1--PE2 and G2 taking path
PE1--P2--PE2.
(but without using GRE encapsulation to have multicast encapsulated into
unicast)

Thanks,
Alaerte


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