Multicast and Routing Guide K/KA/KB.15.15

no [ ip | ipv6 prefix-list name ]
Deletes the entire prefix list identified by name.
no [ ip | ipv6 prefix-list name ] [seq seq-num]
Deletes the entry with the specified sequence number from the prefix list identified
by name.
Individual prefix list entries are made using separate commands in the general
configuration context. All entries that have the same prefix list name are part of the
same prefix list. Thus, the following commands, taken from a show
running-config listing, constitute two prefix lists.
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ip prefix-list "Odd" seq 5 permit 10.1.1.1 255.255.255.0 ge 24 le
24
ip prefix-list "Odd" seq 10 deny 10.1.2.1 255.255.255.0 ge 24 le
24
ip prefix-list "Odd" seq 15 permit 10.1.3.1 255.255.255.0 ge 24
le 24
ip prefix-list "Odd" seq 20 deny 10.1.4.1 255.255.255.0 ge 24 le
24
ip prefix-list "Even" seq 5 deny 10.1.1.1 255.255.255.0 ge 24 le
24
ip prefix-list "Even" seq 10 permit 10.1.2.1 255.255.255.0 ge 24
le 24
ip prefix-list "Even" seq 15 deny 10.1.3.1 255.255.255.0 ge 24 le
24
ip prefix-list "Even" seq 20 permit 10.1.4.1 255.255.255.0 ge 24
le 24
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Sequence numbers, which are optional, determine the order in which prefix list
entries are evaluated during match operations. If you do not specify a sequence
number for an entry, the switch uses a number that is 5 more than the highest
sequence number already used in the list. (For the first entry in a prefix list, the
default value of the sequence number is 5.) You can insert a new entry in a prefix
list between two entries already in the list by specifying a sequence number for the
new entry that is between the sequence numbers of the two existing entries.
Entering a prefix list description
Use the following command to enter a description string into an existing prefix list:
Syntax:
[ ip | ipv6 prefix-list name ] [seq seq-num description
description-string]
Enters a description into a prefix list.
[ ip | ipv6 ] Specifies an IPv4 (IP) or IPv6 prefix list.
name Specifies the name of the prefix list to which this
description will be added. The prefix list must already
exist.
seq seq-num Optionally specifies a sequence number for the
description entry. The description is attached to the
prefix list entry identified by that sequence number.
206 Route Policy