Ip Configuration Command Set; Configuring Routing Interface Settings - Enterasys Matrix 2G4072-52 Configuration Manual

IP Configuration Command Set

Configuring Routing Interface Settings

12.2 IP CONFIGURATION COMMAND SET
12.2.1 Configuring Routing Interface Settings
About Loopback vs. VLAN Interfaces
Loopback interfaces are different from VLAN routing interfaces because they allow you to
disconnect the operation of routing protocols from network hardware operation, improving the
reliability of IP connections. A loopback interface is always reachable. The IP address assigned to
the loopback interface is used as the router ID, which helps when running protocols like OSPF,
because OSPF can be running even when the outbound interface is down. IP packets routed to the
loopback interface are rerouted back to the router or access server and processed locally.
Routing interface configuration commands in this guide will configure either a VLAN or loopback
interface, depending on your choice of parameters, as shown in
Table 12-1 VLAN and Loopback Interface Configuration Modes
For Routing
Interface Type...
VLAN
Loopback
Local (software
loopback)
For details on how to enable all router CLI configuration modes, refer back to
For details on configuring routing protocols, refer to
NOTE: The command prompts used in examples throughout this guide show a system
where module (or standalone device) 1 and VLAN 1 have been configured for routing.
The prompt changes depending on your current configuration mode, the specific
module, and the interface types and numbers configured for routing on your system.
12-2 Matrix DFE-Platinum and Diamond Series Configuration Guide
Enter (in Global
Configuration Mode)...
vlan vlan-id
loopback loopback-id
lo local-id
Table 12-1.
Resulting Prompt...
Matrix>Router1 (config-if(Vlan 1))#
Matrix>Router1 (config-if (Lpbk 1))#
Matrix>Router1 (config-if (Lo 1))#
Chapter 13.
Table 2-11.