[c-nsp] Cursed IP address

[Daniel Roesen]

On Sat, Nov 29, 2014 at 09:41:45PM +0600, Victor Sudakov wrote:
> We have set up port monitor sessions in various parts of the network
> and have found out the following. One of the C3560X-24P in the chain
> of identical switches does not let through packets with
> src=10.65.127.246&dst=224.0.0.5. Neither when such packets transit the
> switch nor when it's configured on one of it's own Vlan interfaces.
> 
> Other switches in the chain are identical from the hardware/software
> point of view, and configured almost identically, but do not suffer
> from the problem.

Check for enabled IGMP snooping on this switch. Try disabling snooping.

Wouldn't outrule broken hardware... Some bit flip error or so.

Best regards,
Daniel

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