August 2005
Intermediate to advanced
798 pages
31h 12m
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
ip forward-protocol udpcommand.-
turbo-flood Speeds up the flooding of UDP datagrams when using the spanning-tree algorithm. This command should be used in conjunction with the
ip forward-protocol spanning-treecommand.
Example
To forward port 21000 for a specific application:
ip forward-protocol udp 21000
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
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.