Cabletron Systems CSX1000 - Manual (Page 379)

Workgroup Remote Access Switch 379
S YSTEM V ERIFICATION
Verifying DHCP Relay Agent
V ERIFYING THE R ELAY A GENT IS E NABLED
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.
V ERIFYING THE R ELAY A GENT IS O PERATIONAL
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.
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”).
ISDN
IP Router ("Alex") CSX1200
IP Router w/ DHCP
Relay Agent ("Ruby")
DHCP Server
DHCP Client
192.168.1.5
192.168.1.168 204.157.42.168
WORKGROUP REMOTE ACCESS SWITCH
LAN 10BASE-T RX TX SERVICE CH-2 D-CH CH-1 SYNC POWER LINE 1 CH-2 D-CH CH-1 SYNC
LINE 2 CH-2 D-CH CH-1 SYNC
LINE 3 CH-2 D-CH AGI
CH-1 SYNC
LINE 4