From: Ivan (ivan@iip.net)
Date: Fri Feb 09 2007 - 06:16:57 ART
sh mac-address-table display only mac addess learned by the switch. Multicast
address can't be a src MAC-address of packet consecuently it will never
displayed by command above.
You must use special technology such as RGMP, CGMP, IGMP snooping or manual
configuring to see this information. Without it all multicast traffic spread
across all ports in switch.
On Friday 09 February 2007 00:37, Sydney Hawke wrote:
> Hello,
>
> Where is the 0100.5e01.0101 address?
>
> "sh mac-address-table multicast"
> is empty?
> I have a scenario where I would like to check the mapped multicast
> mac-address for a multicast group and I thought I could do that after
> enabling the ip igmp join-group 224.1.1.1 on a SVI or connected router
> interfaces to the switch ports.
> I have attached 4 routers and 2 of then are simulating
> receivers and the other two are just there to make me believe in the igmp
> snooping ie that it does not flood the non receiver ports. All "hosts" are
> connected to the same vlan.
> xxxxxxxxxxxxxxxxxxxxxxx
> sw4#sh mac-address-table
> multicast
> Vlan Mac Address Type Ports
> ---- -----------
> ---- -----
> <-- I expected to have something here ie the mapped 224.1.1.1 -->
> 0100.5e01.0101
> sw4#
> xxxxxxxxxxxxxxxxxxxxxxx
> I created a static entry and that
> show up???
> sw4#sh mac-address-table multicast
> Vlan Mac Address Type
> Ports
> ---- ----------- ---- -----
> 100 0100.5e00.1234
> USER Gi0/23
> sw4#
> xxxxxxxxxxxxxxxxxxxxxxx
> This is one of the routers
> simulating a receiver connected to sw4:
> FRS#sh ip igmp groups 224.1.1.1
> IGMP
> Connected Group Membership
> Group Address Interface Uptime
> Expires Last Reporter
> 224.1.1.1 FastEthernet0/0 01:05:10
> 00:02:03 150.1.56.10
> FRS#
> Does anyone have a small test scenario I could test
> so I actually can see the dynamic multicast mac-address entry that I though
> igmp snooping would do or what am I missing?
>
> Best Regards,
>
> Sydney
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-- Ivan
This archive was generated by hypermail 2.1.4 : Thu Mar 01 2007 - 07:38:46 ART