Enterasys Networks CSX7000 Bedienungsanleitung PDF herunterladen (Seite 465)

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Central Site Remote Access Switch 465

ERIFYING

YSTEM

PTIONS

DHCP Relay Agent

4. If an error occurred while trying to enable the Relay Agent, the following message may be

displayed in the report log:

[DHCP-R] Failed to open UDP port (67), erc=<error return code>

This indicates that an internal error occurred while trying to open a UDP port for use by the

DHCP/BOOTP Relay Agent. Therefore, the relay agent will not operate correctly. Contact your

Distributor or Customer Support.

5. If the following message is NOT found in the report log after system initialization:

[DHCP-R] Relay Agent enabled; UDP port (67) opened

It indicates that there was no attempt made to enable the DHCP/BOOTP Relay Agent. Try the

following:

a. Check the DHCP configuration. This can be done by using CFGEDIT, or by using the

dhcp

command from Manage Mode.

b. Make sure that the Relay Agent is enabled.

c. If desired, enter MANAGE mode, and use the

dhcp change

command to enable the Relay

Agent. (Note: CFGEDIT can also be used to change the Relay Agent configuration; but the

changes will not take effect until the system is restarted.)

d. When Manage Mode is exited, an attempt will be made to enable the Relay Agent.

e. Re-examine the report log for the “Relay Agent Enabled” message.

f. Remember to “commit” the Manage Mode configuration changes to make them

permanent.

VERIFYING THE RELAY AGENT IS OPERATIONAL

Once the Relay Agent has been successfully initialized and enabled, DHCP Clients should be able

to obtain their IP addresses (and other configuration parameters) from a DHCP Server.

For example purposes, assume the following diagram represents the network in which the Relay

Agent is being used. This configuration is useful when a remote IP router is known to have access

to a DHCP Server, but that router is not a DHCP/BOOTP Relay Agent.

ISDN

IP Router ("Alex")

CSX5500

IP Router w/ DHCP

Relay A

ent ("Ruby")

DHCP Server

DHCP Client

192.168.1.5

192.168.1.168 204.157.42.168

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