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New Member

PIX and multicast

We all know that PIX (we have a 525 with 10 interfaces) neither doesn't act as a router nor forwards multicast traffic. That's it. But what about if I need to pass multicast from an interface called private (security 80) linked to a layer-2 switch (VLAN private) to the inside (security 100) linked to another layer-3 switch that is routing multicast traffic across other VLANs? There's a way to do this job?

  • Other Security Subjects
3 REPLIES
Cisco Employee

Re: PIX and multicast

Multicast packets will not pass through PIX, you need to create a GRE tunnel to pass multicast traffic through PIX, following link is a sample config for this;

http://www.cisco.com/warp/customer/707/tunnel_pix.shtml

HTH

R/Yusuf

New Member

Re: PIX and multicast

Thanks Yusuf for your reply.

I saw that sample config but I cannot apply it because we don't have routers as peers on both sides. We have two switches that cannot tunnel traffic as Cisco routers do. Are we forced to move that VLAN on the same switch?

New Member

Re: PIX and multicast

What about to upgrade the software to version 6.2 that supports multicast forwarding?

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