Default Gateway

The default gateway is the IP address of the gateway that will receive and forward packets whose addresses are unknown to the local network. The default gateway is useful when sending Bridge Module alert packets to a manager workstation that is on a different network. For example, the following command specifies the gateway with the address 195.24.25.36 to be used as the default gateway for port 2 of the Bridge Module.

OEBM> set device default_gateway_port2 195.24.25.36

[ENTER]

Subnetwork Mask

The subnetwork mask is specific for each type of Internet class. In general, the subnetwork mask is a 32-bit IP address with all ones (1) in the network and subnetwork portions of the address and zeroes (0) in the host portion. The subnetwork maskis input as four pairs of hexadecimal d igits separated by periods to represent the 32-bit binary address. For example, to set the subnetwork mask for a class C network you would enter the following command.

OEBM> set device subnet_mask_port1 FF.FF.FF.0

[ENTER]

The subnetwork mask for a class B network would be set using the following command.

OEBM> set device subnet_mask_port1 FF.FF.0.0

[ENTER]

Alert Settings

The SET ALERT command is used to enable or disable sending alerts to the SNMP management workstation. Refer to the SET ALERT command for information on the different types of alerts you can set. For example, the following command enables sending an alert when a configuration change is made to the concentrator or Spanning Tree topology change is detected.

OEBM> set alert change enable [ENTER]

3 - 18 ONline Ethernet Bridge Module Installation and Operation Guide

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3Com 5102B-EE installation and operation guide Default Gateway, Subnetwork Mask, Alert Settings