Cisco 300 Series Cli Manual page 600

Stackable managed switches

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IPv6 Prefix List Commands

OL-32830-01 Command Line Interface Reference Guide

prefix length greater than, or equal to, a value is specified using the ge keyword.

The ge and le keywords can be used to specify the range of the prefix length to be

matched in more detail than the usual

For a candidate prefix to match against a prefix list entry the following conditions

The candidate prefix must match the specified prefix list and prefix length

The value of the optional le keyword specifies the range of allowed prefix

lengths from 0 up to the value of the

The value of the optional ge keyword specifies the range of allowed prefix

lengths from the value of the

Note that the first condition must match before the other conditions take effect.

An exact match is assumed when the ge or le keywords are not specified. If only

one keyword operand is specified then the condition for that keyword is applied,

and the other condition is not applied. The

the ge value. The ge value must be less than, or equal to, the le value. The le value

must be less than or equal to 128.

Every IPv6 prefix list, including prefix lists that do not have permit and deny

condition statements, has an implicit deny any any statement as its last match

Formal Specification

Checked prefix is cP and checked prefix length is cL.

Function PrefixIsEqual(P1, P2, L) compares the first L bits of two addresses P1 and

P2 and returns TRUE if they are equal.

Case 1. A prefix-list entry is:

P - prefix address

L - prefix length

ge - is not defined

le - is not defined

The prefix cP/cL matches the prefix-list entry if PrefixIsEqual(cP,P,L) && cL == L

Case 2. An prefix-list entry is:

P - prefix address

prefix-length

argument, and including, this

argument up to, and including, 128.

prefix-length

value must be less than