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UDP forwarding

Can anyone confirm if the Cat6K ip forwarder process forwards frames that are broadcast to the specific subnet broadcast address and not the 255.255.255.255 address?

i.e if a workstation sends to 141.144.5.127 which in this case would be the broadcast address of subnet 141.144.5.0 /25

ip forward-protocol udp sunrpc - is configured as well as a helper address on the interface but the box does not seem to forward the frame.

There don't appear to be any commands on the C6K to display this either?

1 REPLY
Cisco Employee

Re: UDP forwarding

Yes, the Cat6k can foreward UDP broadcasts that are directed to the subnet broadcast. Make sure your configuration does not have "no ip directed-broadcast," a default configuration, as these will prevent the packets from being forwarded.

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