16.2.2 Checking routes to IPv4 multicast group addresses

To use IPv4 multicast with the Switch, execute the show ip mcache command to check that a route to the destination address exists. If it does not exist, and outgoing is incorrect, check for "16.2.3 IPv4 PIM-SM info" and "Check 16.2.4 IGMP info".

Figure 16-8: Result of executing show ip mcache command
> show ip mcache Date 20XX/04/01 15:20:00 UTC Total: 1 route - Forwarding entry ---------------------------------------------------------- Group Address Source Address Flags Uptime Expires 225.10.10.1 172.16.10.1 01:00 02:00 incoming: VLAN0012(192.168.10.1) outgoing: VLAN0001(192.168.20.1) VLAN0004(192.168.40.1) >

Figure 16-8: Result of executing show ip mcache command

> show ip mcache
Date 20XX/04/01 15:20:00 UTC
Total: 1 route
- Forwarding entry ----------------------------------------------------------
Group Address  Source Address  Flags  Uptime  Expires
225.10.10.1    172.16.10.1             01:00   02:00
     incoming:
         VLAN0012(192.168.10.1)
     outgoing:
         VLAN0001(192.168.20.1)
         VLAN0004(192.168.40.1)
>

[Figure Data]