346CHAPTER 21: CONFIGURING IP APPLICATION

UDP needs to be forwarded Broadcast messages of common protocols usually adopt UDP. The destination port number of UDP is configured to set the transparent transmission protocol. For example, transparent transmission of TFTP broadcast messages (port number 69) and DNS protocol broadcast messages (port number 53) can be configured. At most 20 transparent transmission forwarding protocols can be configured.

Perform the following task in system view.

Table 381 Configure transparent transmission forwarding protocol

Operation

Command

 

 

Add transparent transmission forwarding

ip relay protocol udp port

protocol

 

 

 

 

 

Delete transparent transmission forwarding

undo

ip relay protocol udp [

protocol

port

]

 

 

 

By default, no transparent transmission forwarding protocol is configured.

Display and Debug Table 382 Display and debug of DHCP relay

 

DHCP Relay

 

 

Operation

Command

 

 

 

 

 

Display the current transparent transmission protocol

display ip relay protocol

 

 

 

 

Display helper addresses of respective interfaces

display ip relay-address

 

 

 

 

Turn on DHCP relay and transparent transmission

debugging ip relay protocol

 

debugging information switch

 

 

 

 

DHCP Relay

I. Configuration Requirement

Configuration Example

DHCP client host is in the network segment 10.110.0.0, while DHCP server is in

 

 

the network segment 202.38.0.0. DHCP relay router needs to relay DHCP

 

messages, so that DHCP client hosts can obtain configuration information such as

 

IP address from DHCP server through application.

 

DHCP server should be assigned with an address pool in network segment

 

10.110.0.0, so that it can assign proper address information to the DHCP client

 

host on the network segment. Meanwhile, the route to 10.110.0.0 should be

 

available on DHCP server.

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3Com 10014299 manual Dhcp Relay Configuration Requirement, IP address from Dhcp server through application