Re: multicast routing on 3750 switch

Hi ZZ,

Could be that the 3750 does not have 'ip multicast routing distributed'.

If that is not the issue, then I would check the igmp memberships and
multicast routing table on SW2 and SW4. Debug ip mpacket & debug ip
icmp may also help.

Multicast bugs are not unknown, so if your configuration is good then
check the known bug list for your software version. I seem to recall
hearing that in one release the join group command only causes the
router to issue a membership report once - after that it was said to
remain silent and not respond to queries.

Paul.

p.s. Are you Zorro's ambidextrous cousin? Strange kind of hero that
man. Dresses in black, wears a mask, carries a sword in public and has
no respect for other people's soft furnishings. :-)

ZZ wrote:
> Hi Experts,
>
> I'm trying to lab out very simple scenario using IE LAB workbook 1 Ver 5,
> task 8.3
>
> Sparse-mode.
>
> R4<---->R5 (RP) <---> SW2 <---->SW4
>
> SW4
> interface Vlan10
> ip address 155.1.10.10 255.255.255.0
> ip pim sparse-mode
> ip igmp join-group 224.1.2.3
>
> when I tried to ping 224.1.2.3 from R5 SW4 never replied. SW4 is 3750, when
> I replaced it with 3550 or 3560 everything was perfect.
>
> Is there any caveat here or I'm missing something?
>
> Thanks in advance,
> ZZ
>
>
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Received on Tue May 05 2009 - 20:31:19 ART