Configure the UDP Port Forwarding List
Configure the UDP port forwarding list to assign protocols and servers to the port forward list.
About this task
You can perform this procedure in Global Configuration mode, VLAN Interface Configuration mode, or VRF Router Configuration mode.
Procedure
Example
Switch:1> enable Switch:1# configure terminal
Configure the UDP port forwarding list:
Switch:1(config)# ip forward-protocol udp portfwdlist 1
Log on to the VLAN interface configuration mode:
Switch:1(config)# interface vlan 3
Configure the broadcast mask:
Switch:1(config-if)# ip forward-protocol udp broadcastmask 192.0.2.255
Configure the maximum time to live:
Switch:1(config-if)# ip forward-protocol udp maxttl 10
Confirm the configuration:
Switch:1(config-if)# show ip forward-protocol udp portfwdlist
Variable definitions
Use the data in the following table to use the ip forward-protocol udp portfwdlist command.
Variable |
Value |
---|---|
<1-1000> |
Creates a UDP port forwarding list in the range of 1–1000. |
<1–65535> {A.B.C.D} |
Adds a UDP protocol port to the specified port forwarding list. 1-65535 is a UDP protocol port in the range of 1–65535. A.B.C.D is an IP address in a.b.c.d format. Use the no operator to remove or delete a port forwarding list ID, no ip forward-protocol udp portfwdlist <1-1000> <1-65535> <A.B.C.D>. To configure this option to use the default value, use the default operator with this command. |
name WORD<0–15> |
Changes the name of the port forwarding list. |
Use the data in the following table to use the ip forward-protocol udp command.
Variable |
Value |
---|---|
broadcastmask {A.B.C.D} |
Configures the interface broadcast mask (the interface broadcast mask can be different from the interface mask). A.B.C.D is an IP address in a.b.c.d format. Use the no operator to delete the broadcast mask: no ip forward-protocol udp broadcastmask {A.B.C.D} To configure this option to the default value, use the default operator with this command. |
maxttl <1-16> |
Configures the maximum time-to-live value (TTL) for the UDP broadcast forwarded by the interface. The range is 1–16. |
portfwdlist <1–1000> |
Assigns the list to the VLAN. |
vlan <1-4059> [portfwdlist <1–1000>] |
Specifies the VLAN ID in the range of 1 to 4059. By default, VLAN IDs 1 to 4059 are configurable and the system reserves VLAN IDs 4060 to 4094 for internal use. On switches that support the vrf-scaling and spbm-config-mode boot configuration flags, if you enable these flags, the system also reserves VLAN IDs 3500 to 3998. VLAN ID 1 is the default VLAN and you cannot create or delete VLAN ID 1. If you use the portfwdlist variable with the VLAN variable, it assigns the list to the specified VLAN, regardless of which VLAN context you currently configure. |