December 2001
Intermediate to advanced
608 pages
25h 14m
English
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Name
ip forward-protocol — global
Synopsis
ip forward-protocol {udp [port] | any-local-broadcast | spanning-tree | turbo-flood}
no ip forward-protocolConfigures
Forwarding of broadcast packets for certain services
Default
Enabled with the ip
helper-address command
Description
When the ip
helper-address
command is configured for an interface, the router
“helps” hosts find certain UDP services by forwarding the
packets. These services are BOOTP (DHCP), DNS, TFTP, TACACS, TIME,
and NetBIOS name and datagram servers. This command allows you to
define additional UDP ports that you want forwarded automatically to
the helper IP address.
-
port Optional. Without this parameter, all the default UDP ports listed here are forwarded. This keyword allows you to forward a specific port. You can disable a default port with the
noversion of this command.-
any-local-broadcast Forwards any broadcasts including local subnet broadcasts.
-
spanning-tree Forwards IP broadcasts that meet the following criteria: First, it must be a MAC level broadcast; second, it must be an IP level broadcast; and third, it must be TFTP, DNS, NetBIOS, ND, TIME, BOOTP, or any other UDP packet specified by an
ipforward-protocoludpcommand.-
turbo-flood Speeds up the flooding of UDP datagrams when using the spanning-tree algorithm. This command should be used in conjunction with the
ipforward-protocol spanning-treecommand.
Example
To forward port 21000 for a specific application:
ip forward-protocol udp 21000
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.