Any one have an idea on how to suppress multicast flooding on a
2948G-L3. The switch is configured with 3 bridge groups, and 3 bvi
interfaces. The problem is that multicast packets are flooded throughout
the bridge group the multicast server is connected to. Below is a
snippet of the running config:

ip multicast-routing
ip dvmrp route-limit 20000
bridge irb
!
int f1
 no ip address
 bridge-group 2
!
int f2
 no ip address
 bridge-group 2
!
int f3
 no ip address
 bridge-group 3
!
int bvi 2
 ip add 10.10.20.1 255.255.255.0
 ip pim sparse-dense-mode
!
int bvi 3
 ip add 10.10.30.1 255.255.255.0
 ip pim sparse-dense-mode
!
bridge cmf
bridge 2 proto ieee
bridge 2 route ip
bridge 3 proto ieee
bridge 3 route ip
etc

Software version is: cat2948g-in-mz.120-14.W5.20.bin

CGMP is not supported on the bvi interface (at least not with this
software release). CMF (Constrained Multicast Flooding) should do the
trick, but doesn't appear to be working as expected. The flooding
happens regardless of whether or not any host registers interest in
receiving the multicast group. Multicast routing is working fine, and
only registered hosts receive the multicast traffic, i.e flooding does
not occur on the bridge group that the multicast server is not connected
to.

Any ideas will be greatly appreciated.

CM




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