Re: how to properly verify a broadcast to multicast-helper?

I personally think the broadcast DNS method than Ryan mentioned is the
cleanest way to verify. All you need to do to enable it is:

1. enable DNS lookups - "ip domain-lookup" (ensure there are no
name-servers configured)
2. add udp/53 to the helper ACLs
3. add udp/53 to the forward-protocol udp list - "ip forward-protocol udp 53"

Then all you need to do is ping some random names to generate DNS
lookups. There's no routing protocol config and no IP SLA
configuration/scheduling headaches.

cheers,
Dale

On Tue, May 26, 2009 at 5:15 PM, Wouter Prins <wp_at_null0.nl> wrote:
> Hi,
>
> Thanks for the responses.
> I saw this blog but i cannot configure the udpecho to be send to
> 255.255.255.255, that's why i came here. ;)
>
> RSRack1R6(config-sla-monitor)#type udpEcho dest-ipaddr ?
> Hostname or A.B.C.D IP address or hostname, broadcast disallowed
>
> What would the reason be that my broadcast isnt being converted with my
> current config?
> Afaik i configured everything correctly. Does the ip multicast helper-map
> only work on 255.255.255.255 or something?

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Received on Tue May 26 2009 - 17:27:30 ART