Users Guide

Table Of Contents
Contents 37
32 Routing Interfaces . . . . . . . . . . . . . . . . 1219
Routing Interface Overview . . . . . . . . . . . . . . 1219
What Are VLAN Routing Interfaces?
. . . . . . . 1219
What Are Loopback Interfaces?
. . . . . . . . . 1220
What Are Tunnel Interfaces?
. . . . . . . . . . . 1221
Why Are Routing Interfaces Needed?
. . . . . . 1222
Default Routing Interface Values
. . . . . . . . . . . 1224
Configuring Routing Interfaces (Web)
. . . . . . . . . 1225
IP Interface Configuration
. . . . . . . . . . . . 1225
DHCP Lease Parameters
. . . . . . . . . . . . . 1226
VLAN Routing Summary
. . . . . . . . . . . . . 1226
Tunnel Configuration
. . . . . . . . . . . . . . . 1227
Tunnels Summary
. . . . . . . . . . . . . . . . . 1228
Loopbacks Configuration
. . . . . . . . . . . . . 1229
Loopbacks Summary
. . . . . . . . . . . . . . . 1230
Configuring Routing Interfaces (CLI)
. . . . . . . . . 1231
Configuring VLAN Routing Interfaces (IPv4)
. . . 1231
Configuring Loopback Interfaces
. . . . . . . . . 1233
Configuring Tunnels
. . . . . . . . . . . . . . . 1234
33 Layer-2 and Layer-3 Relay Features . . 1235
L2 and L3 Relay Overview . . . . . . . . . . . . . . . 1235
What Is L2 DHCP Relay?
. . . . . . . . . . . . . 1235
What Is L3 DHCP Relay?
. . . . . . . . . . . . . 1239
What Is the IP Helper Feature?
. . . . . . . . . . 1240
Default L2/L3 Relay Values
. . . . . . . . . . . . . . 1244
Configuring L2 and L3 Relay Features (Web)
. . . . . 1245
L2 DHCP Relay Global Configuration
. . . . . . . 1245