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Re: ethernet level multicast


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  • From: Alan Crosswell <>
  • To: Luís Marta <>
  • Cc:
  • Subject: Re: ethernet level multicast
  • Date: Tue, 19 Aug 2003 13:53:28 -0400

Perhaps you could set up GRE tunnels across your infrastructure and only enable PIM on the tunnels? Cisco actually recommends this technique as a way to load share multicast across parallel links (letting the underlying unicast routing protocol to the load sharing).
/a

Luís Marta wrote:
Hi.

If one has a backbone network based on Fast/Gigabit Ethernet, different
brands of routers and not-so-powerful switches (no chance of running RGMP),
how does one implement multicast?
In order to avoid the multicast traffic to leak to all the switches' ports,
i thought of creating a separate VLAN to the multicast traffic, a VLAN that
connects the RP, the backbone routers until the last one before the client
(the access routers), but then the last connection may be ATM ou any other
technology.
As PIM interacts with the routing protocol in use (OSPF for example), how
can i make the multicast traffic that is supposed to go to a certain client
use the mentioned VLAN? Is there any other way of doing this without using
static mroutes to map the clients' routes? Because this is very
time-consuming and impossible to maintain.

Thanks in advance,

Luís Marta.




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