Command Reference Guide

SROS Command Line Interface Reference Guide Global Configuration Mode Command Set

ip prefix-list <listname> seq <sequence#> [permit | deny] <network/len>

[le <le-value> | ge <ge-value>]

Use the ip prefix-list seq command to specify a prefix to be matched or a range of mask lengths.

Syntax Description

<listname> Specifies a particular prefix list.

<sequence#> Specifies the entry's unique sequence number which determines the processing

order. Lower-numbered entries are processed first. Range: 1 to 4294967294.

permit Permits access to matching entries.

deny Denies access to matching entries.

<network/len> Specifies the network number and network mask length.

le <le-value> Specifies the upper end of the range. Range: 0 to 32.

ge <ge-value> Specifies the lower end of the range. Range: 0 to 32.

Default Values

If no ge or le parameters are specified, an exact match is assumed. If only ge is specified, the range is

assumed to be from ge-value to 32. If only le is specified, the range is assumed to be from len to le-value.

Command Modes

(config)# Global Configuration Mode

Functional Notes

This command specifies a prefix to be matched. Optionally, it may specify a range of mask lengths. The

following rule must be followed: len < ge-value <

le-value. A prefix list with no entries allows all routes. A

route that does not match any entries in a prefix list is dropped. As soon as a route is permitted or denied,

there is no further processing of the rule in the prefix list. A route that is denied at the beginning entry of a

prefix list will not be allowed, even if it matches a permitting entry further down the list.

Usage Examples

The following example creates a prefix list entry in the prefix list

test

matching only the 10.0.0.0/8 network:

(config)#ip prefix-list test seq 5 deny 10.0.0.0/8

The following example creates a prefix list entry in the prefix list test matching any network of length 24 or

less:

(config)#ip prefix-list test seq 10 permit 0.0.0.0/0 le 24