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70 XSR User’s Guide

General IP Features Chapter 5

Configuring IP

Trivial File Transfer Protocol (TFTP)

TFTP is a bare bones file transfer protocol, as defined by RFC-1350, using

UDP to simplify transport with less overhead. The XSR provides TFTP client

functionality using the

snmp-server tftp-server-list and copy <file>

commands. Always enabled on the router, it is useful to save and restore

configuration files and images.

Refer to the XSR CLI Reference Guide and the Managing the XSR chapter in this

manual for more information.

IP Interface

IP interfaces are virtual circuits used to pass traffic between a physical port

and the XSR forwarder. IP interfaces have the following characteristics:

 Numbered interfaces have IP addresses assigned to them.

 The port can be pinged to monitor its status with the

ping command.

 Some routing protocols require the interface to have an IP address.

 The

interface <serial | fastethernet/gigabitethernet |

dialer | loopback dialer | vpn>

command sets all XSR ports.

 The XSR supports a total of 42 interfaces.

 Un-numbered interfaces are not assigned IP addresses

– Un-numbered interfaces may be used on point-to-point

networks. By default, the address used by the unnumbered

interface when it generates a packet is the router ID, which is the

address of the highest, non-zero configured loopback interface.

An unnumbered interface address can be configured to be the

address of a specified numbered interface. The

ip unnumbered

command sets interface parameters on the XSR.

– An un-numbered interface cannot be pinged to monitor its status.

Secondary IP

Enabling secondary IP allows multiple IP addresses to be configured on the

same physical network interface and multiple subnets to share one MAC

address. Secondary addresses are treated largely like primary addresses, but

not exactly the same, as explained below.

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Enterasys ANG-3000 Guide de l'utilisateur Page 104