UDP Port Forwarding

pgcampbell · ‎07-23-2002

Catalyst 4006 Sup-3 engine. What is the Command to allow specific UDP ports to be forwarded for UDP Broadcast-based 3rd party apps. across VLANS?

And on the Sup-2 anything special required?

TIA

Prashanth Krishnappa · ‎07-23-2002

Use helper addresses and "ip forward-protocol udp " if you need specific ports

Sup 2 is a layer2 only and no special configuration needed

Here is a sample from Sup3

SwitchA(config)#ip forward-protocol udp ?

<0-65535> Port number

biff Biff (mail notification, comsat, 512)

bootpc Bootstrap Protocol (BOOTP) client (68)

bootps Bootstrap Protocol (BOOTP) server (67)

discard Discard (9)

dnsix DNSIX security protocol auditing (195)

domain Domain Name Service (DNS, 53)

echo Echo (7)

isakmp Internet Security Association and Key Management Protocol (500)

mobile-ip Mobile IP registration (434)

nameserver IEN116 name service (obsolete, 42)

netbios-dgm NetBios datagram service (138)

netbios-ns NetBios name service (137)

netbios-ss NetBios session service (139)

ntp Network Time Protocol (123)

pim-auto-rp PIM Auto-RP (496)

rip Routing Information Protocol (router, in.routed, 520)

snmp Simple Network Management Protocol (161)

snmptrap SNMP Traps (162)

sunrpc Sun Remote Procedure Call (111)

syslog System Logger (514)

tacacs TAC Access Control System (49)