Cabletron Systems CSX1200, CSX1000 manual Verifying the Relay Agent is Enabled

SYSTEM VERIFICATION

Verifying DHCP Relay Agent

VERIFYING THE RELAY AGENT IS ENABLED

If the Relay Agent has been enabled via configuration, it will attempt to open a UDP port for use. A message describing the outcome of this operation will appear in the report log.

1.Examine the report log. Type: dr <return>

2.Look for any messages that begin with [DHCP-R].

3.If the Relay Agent has been enabled via configuration, the following message should appear:

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

If the above message was found in the report log, the Relay Agent has been successfully enabled.

If an error occurred while trying to enable the Relay Agent, the following message will be present in the report log:

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

If this error message is found in the report log, refer to Enabling the Relay Agent in the Problem Diagnosis chapter.

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 the Relay Agent is being used in. 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.

DHCP Client

DHCP Server

192.168.1.5

ISDN

192.168.1.168

204.157.42.168

IP Router ("Alex")

CSX1200

IP Router w/ DHCP Relay Agent ("Ruby")

In this configuration, the DHCP Client is able to obtain its IP address from the DHCP Server, using the Relay Agent contained in the IP Router on the client’s LAN (“Ruby”).

Workgroup Remote Access Switch 379