ripprapp at hotmail
Jul 11, 2005, 4:44 PM
Post #1 of 1
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Alpine, Multicast and FE-card strange problem
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Hi,
I have an Alpine with both GE (fiber), GE (cu) and FE interface cards. On
one of these GE (fiber) cards I recieve lots of multicast traffic (more than
100Mb/s) from different Mcast-sources. The VLAN is then spread to both FE
ports ans a GE (cu) port where I have connected a switch.
When I connect a PC direct to a FE port I can only pick up one Mcast group.
If I connect another PC to another FE port I can also pick up only one Mcast
group. If I try to pick up another group on the same PC or put the two PCs
on the same FE port (using a hub/switch) I can only pick up one mcastgroup
at a time.
I have also connected a switch on my GB (cu) interface and if I then (on
that switch) connects the same computer to different FE ports I can pick up
several Mcast groups on each PC.
Therefore I know for sure that the Mcast traffic is perectly fine.
I am of course running IGMP snooping on my Alpine (on that particular VLAN)
and if I run 'show port util' there seem to be the rigth amount of traffic
on my FE ports connecting my two test-PCs (that is about 6Mb/s for one
channel). With two channel I do not get 12Mb/s though, and my picture looks
bad.
Have anyone seen anything similar with Alpines and FE cards?
Any suggestions what to look for?
Any ideas is of interest...
Best Regards
/// Fredrik
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