User`s guide

186 XSR User’s Guide
Backup Configuration Chapter 8
Configuring Dialer Services
Configuration for Ethernet Failover
This example provides DSL backup (PPPoE) on a FastEthernet interface.
Dialer interface 57 is configured as the backup for FastEthernet sub-interface
2.1 - invoking the sub-interface enables PPPoE. Note that the IP address of the
PPPoE caller is negotiated over PPP and the MTU size is reset to 1492 bytes to
avoid Web access problems by PCs attached to the XSR.
XSR(config)#interface fastethernet 2
XSR(config-if<F2>)#no shutdown
XSR(config)#interface fastethernet 2.1
XSR(config-if>)#backup interface dialer 57
XSR(config-if>)#encapsulation ppp
XSR(config-if>)#ip address negotiated
XSR(config-if>)#ip mtu 1492
XSR(config-if>)#no shutdown