Could anyone help me with Cisco 4948 config? I have to route multicast traffic from one Vlan to another. Multicast source and multicast destination are IGMP-enabled devices, there are no PIM-devices in the network. Can this task be solved with such hardware?
The 4948 is a very capable platform and can definitely route IP multicast between subnets. Take a look at this configuration guide to get yourself started. It's fairly comprehensive and you'll want to focus on the section about PIM with a static RP ("Configuring a Single Static RP"). You'll generally be doing the following:
- Globally enable multicast routing ("ip multicast routing").
- Set up an RP - "ip pim rp x.y.z.q" If you don't have an RP in your network just set up a loopback interface on your switch and use its address.
- On each L3 interface (SVI, routed switchport) you want to support multicast routing enter "ip pim sparse-mode"
That's pretty much it. There are some other considerations if you want to route the multicast to hosts on other switches or if you want to support SSM but this should get you started with basic multicast routing.