Prefix List Commands
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Prefix List Commands
This chapter describes the Cisco IOS XR software commands used to configure IP Version 4 (IPv4) and IP Version 6 (IPv6) prefix lists on Cisco ASR 9000 Series Aggregation Services Routers .
For detailed information about prefix list concepts, configuration tasks, and examples, refer to the Cisco ASR 9000 Series Aggregation Services Router IP Addresses and Services Configuration Guide
- clear prefix-list ipv4
- clear prefix-list ipv6
- copy prefix-list ipv4
- copy prefix-list ipv6
- deny (prefix-list)
- ipv4 prefix-list
- ipv6 prefix-list
- permit (prefix-list)
- remark (prefix-list)
- resequence prefix-list ipv4
- resequence prefix-list ipv6
- show prefix-list
- show prefix-list afi-all
- show prefix-list ipv4
- show prefix-list ipv4 standby
- show prefix-list ipv6
clear prefix-list ipv4
To reset the hit count on an IP Version 4 (IPv4) prefix list, use the clear prefix-list ipv4 command in EXEC mode.
Syntax Description
name
Name of the prefix list from which the hit count is to be cleared.
sequence-number
(Optional) Sequence number of a prefix list. Range is 1 to 2147483646.
Command History
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.
The hit count is a value indicating the number of matches to a specific prefix list entry. Use the clear prefix-list ipv4 command to clear counters for a specified configured prefix list.
Use the sequence-number argument to clear counters for a prefix list with a specific sequence number.
Task ID
Examples
The following example displays IPv4 prefix lists, shows how to clear the counters for list3, then shows how to display the IPv4 prefix lists again, showing that counters are cleared for list3:
RP/0/RSP0/CPU0:router# show prefix-list ipv4 ipv4 prefix-list list1 10 permit 172.18.30.154/16 (8 matches) ipv4 prefix-list list2 20 deny 172.24.30.164/16 (12 matches) ipv4 prefix-list list3 30 permit 172.19.31.154/16 (32 matches) RP/0/RSP0/CPU0:router# clear prefix-list ipv4 list3 RP/0/RSP0/CPU0:router# show prefix-list ipv4 ipv4 prefix-list list1 10 permit 172.18.30.154/16 (8 matches) ipv4 prefix-list list2 20 deny 172.24.30.164/16 (12 matches) ipv4 prefix-list list3 30 permit 172.19.31.154/16clear prefix-list ipv6
To reset the hit count on an IP Version 6 (IPv6) prefix list, use the clear prefix-list ipv6 command in EXEC mode.
Syntax Description
name
Name of the prefix list from which the hit count is to be cleared.
sequence-number
(Optional) Clears counters for a prefix list with a specific sequence number. Range is 1 to 2147483646.
Command History
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.
The hit count is a value indicating the number of matches to a specific prefix list entry. Use the clear prefix-list ipv6 command to clear counters for a specified configured prefix list.
Use the sequence-number argument to clear counters for a prefix list with a specific sequence number.
Task ID
Examples
The following example shows IPv6 prefix lists, clears the counters for sequence number 60 on prefix list list3, then displays the IPv6 prefix lists again, showing that counters are cleared for sequence number 60:
RP/0/RSP0/CPU0:router# show prefix-list ipv6 ipv6 prefix-list list1 40 permit 2000:1::/64 (5 matches) 60 deny 3000:1::/64 (7 matches) RP/0/RSP0/CPU0:router# clear prefix-list ipv6 list1 60 RP/0/RSP0/CPU0:router# show prefix-list ipv6 ipv6 prefix-list list1 40 permit 2000:1::/64 (5 matches) 60 deny 3000:1::/64copy prefix-list ipv4
To create a copy of an existing IP Version 4 (IPv4) prefix list, use the copy prefix-list ipv4 command in EXEC mode.
Syntax Description
source-name
Name of the prefix list to be copied.
destination-name
Destination prefix list where the contents of the source-name will be copied.
Command History
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.
Use the copy prefix-list ipv4 command to copy a configured prefix list. Use the source-name argument to specify the prefix list to be copied and the destination-name argument to specify where to copy the contents of the source prefix list. The destination-name argument must be a unique name; if the destination-name argument name exists for a prefix list or access list, the prefix list is not copied. The copy prefix-list ipv4 command checks that the source prefix list exists, then checks the existing list names to prevent overwriting existing prefix lists.
Task ID
Examples
The following example displays IPv4 prefix lists, shows how to copy prefix-list1 to list4, then displays the IPv4 prefix lists again, showing prefix list4:
RP/0/RSP0/CPU0:router# show prefix-list ipv4 ipv4 prefix-list list1 10 permit 172.24.20.164/16 ipv4 prefix-list list2 20 deny 172.18.30.154/16 ipv4 prefix-list list3 30 permit 172.29.30.154/16 RP/0/RSP0/CPU0:router# copy prefix-list ipv4 list1 list4 RP/0/RSP0/CPU0:router# show prefix-list ipv4 ipv4 prefix-list list1 10 permit 172.24.20.164/16 ipv4 prefix-list list2 20 deny 172.18.30.154/16 ipv4 prefix-list list3 30 permit 172.29.30.154/16 ipv4 prefix-list list4 10 permit 172.24.20.164/16copy prefix-list ipv6
To create a copy of an existing IP Version 6 (IPv6) prefix list, use the copy prefix-list ipv6 command in EXEC mode.
Syntax Description
source-name
Name of the prefix list to be copied.
destination-name
Destination prefix list where the contents of the source-name will be copied.
Command History
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.
Use the copy prefix-list ipv6 command to copy a configured prefix list. Use the source-name argument to specify the prefix list to be copied and the destination-name argument to specify where to copy the contents of the source prefix list. The destination-name argument must be a unique name; if the destination-name argument name exists for a prefix list or access list, the prefix list is not copied. The copy prefix-list ipv6 command checks that the source prefix list exists then checks the existing list names to prevent overwriting existing prefix lists.
Task ID
Examples
The following example shows IPv6 prefix lists, shows how to copy prefix-list1 to list4, then displays the IPv6 prefix lists again, showing prefix list4:
RP/0/RSP0/CPU0:router# show prefix-list ipv6 ipv6 prefix-list list1 40 permit 2000:1::/64 60 deny 3000:1::/64 ipv6 prefix-list list2 10 permit 5555::/24 RP/0/RSP0/CPU0:router# copy prefix-list ipv6 list1 list3 RP/0/RSP0/CPU0:router# show prefix-list ipv6 ipv6 prefix-list list1 40 permit 2000:1::/64 60 deny 3000:1::/64 ipv6 prefix-list list2 10 permit 5555::/24 ipv6 prefix-list list3 40 permit 2000:1::/64 60 deny 3000:1::/6deny (prefix-list)
To set deny conditions for an IP Version 4 (IPv4) or IP Version 6 (IPv6) prefix list, use the deny command in IPv4 prefix list configuration or IPv6 prefix list configuration modes. To remove a condition from a prefix list, use the no form of this command.
[sequence-number] deny network /length [ ge value ] [ le value ] [ eq value ]
no sequence-number deny
Syntax Description
sequence-number
(Optional) Sets deny conditions for a prefix list with a specific sequence number. If you do not use a sequence number, the condition defaults to the next available sequence number in the prefix list. Range is 1 to 2147483646. By default, the first statement is number 10, and the subsequent statements are incremented by 10. The sequence-number argument must be used with the no form of the command.
network / length
Network number and length (in bits) of the network mask.
ge value
(Optional) Specifies a prefix length greater than or equal to the value. It is the lowest value of a range of the length (the “from” portion of the length range).
le value
(Optional) Specifies a prefix length less than or equal to the value. It is the highest value of a range of the length (the “to” portion of the length range).
eq value
(Optional) Exact value of the length .
Command Default
There is no specific condition under which a packet is denied passing the IPv4 or IPv6 prefix list.
Command History
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.
Use the deny command to specify conditions under which a packet cannot pass the prefix list.
The ge, le and eq keywords can be used to specify the range of the prefix length to be matched, for prefixes that are more specific than the network/length argument. Exact match is assumed when neither ge nor le is specified. The range is assumed to be from the ge value to 32 if only the ge keyword is specified. The range is assumed to be from the length to the le value argument if only the le attribute is specified.
A specified ge value or le value must satisfy the following condition:
length < ge value < le value <= 32 (for IPv4)
length < ge value < le value <= 128 (for IPv6)
Task ID
Examples
The following example shows how to deny the route 10.0.0.0/0:
RP/0/RSP0/CPU0:router(config)# ipv4 prefix-list list1 RP/0/RSP0/CPU0:router(config-ipv4_pfx)# 50 deny 10.0.0.0/0The following example shows how to deny all routes with a prefix of 10.3.32.154:
RP/0/RSP0/CPU0:router(config)# ipv4 prefix-list list1 RP/0/RSP0/CPU0:router(config-ipv4_pfx)# 80 deny 10.3.32.154 le 32The following example shows how to deny all masks with a length greater than 25 bits routes with a prefix of 172.18.30.154/16:
RP/0/RSP0/CPU0:router(config)# ipv4 prefix-list list1 RP/0/RSP0/CPU0:router(config-ipv4_pfx)# 100 deny 172.18.30.154/16 ge 25The following example shows how to deny mask lengths greater than 25 bits in all address space:
RP/0/RSP0/CPU0:router(config)# ipv6 prefix-list list2 RP/0/RSP0/CPU0:router(config-ipv6_pfx)# 70 deny 2000:1::/64 ge 25The following example shows how to add deny conditions to list3, then use the no form of the command to remove the condition with the sequence number 30:
RP/0/RSP0/CPU0:router(config)# ipv6 prefix-list list3 RP/0/RSP0/CPU0:router(config-ipv6_pfx)# deny 2000:1::/64 ge 25 RP/0/RSP0/CPU0:router(config-ipv6_pfx)# deny 3000:1::/64 le 32 RP/0/RSP0/CPU0:router(config-ipv6_pfx)# deny 4000:1::/64 ge 25 Uncommitted changes found, commit them? [yes]: y RP/0/RSP0/CPU0:router# show prefix-list ipv6 ipv6 prefix-list list3 10 deny 2000:1::/64 ge 25 20 deny 3000:1::/64 le 32 30 deny 4000:1::/64 ge 25 RP/0/RSP0/CPU0:router# configure RP/0/RSP0/CPU0:router(config)# ipv6 prefix-list list3 RP/0/RSP0/CPU0:router(config-ipv6_pfx)# no 30 Uncommitted changes found, commit them? [yes]: y RP/0/RSP0/CPU0:router# show prefix-list ipv6 ipv6 prefix-list list3 10 deny 2000:1::/64 ge 25 20 deny 3000:1::/64 le 32Related Commands
ipv4 prefix-list
To define an IP Version (IPv4) prefix list by name, use the ipv4 prefix-list command in global configuration mode. To remove the prefix list, use the no form of this command.
Syntax Description
Command History
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.
Use the ipv4 prefix-list command to configure an IPv4 prefix list. This command places the router in prefix-list configuration mode, in which the denied or permitted access conditions must be defined with the deny or permit command. You must add a condition to create the prefix list.
Use the resequence prefix-list ipv4 command to renumber existing statements and increment subsequent statements to allow a new IPv4 prefix list statement (permit, deny, or remark) to be added. Specify the first entry number (the base) and the increment by which to separate the entry numbers of the statements. The software will renumber the existing statements, thereby making room to add new statements with the unused entry numbers.
Task ID
Examples
The following example shows the prefix lists, then configures list2, then shows the conditions in both prefix lists:
RP/0/RSP0/CPU0:router# show prefix-list ipv4 ipv4 prefix-list list1 10 permit 172.20.10.171/16 le 24 20 permit 172.18.0.0/16 30 deny 172.24.20.164/16 ge 25 RP/0/RSP0/CPU0:router# configure RP/0/RSP0/CPU0:router(config)# ipv4 prefix-list list2 RP/0/RSP0/CPU0:router(config-ipv4_pfx)#deny 172.18.30.154/16 ge 25 RP/0/RSP0/CPU0:router(config-ipv4_pfx)# Uncommitted changes found, commit them? [yes]: y RP/0/RSP0/CPU0:router# show prefix-list ipv4 ipv4 prefix-list list1 10 permit 172.20.10.171/16 le 24 20 permit 172.18.0.0/16 30 deny 172.24.20.164/16 ge 25 ipv4 prefix-list list2 10 deny 172.18.30.154/16 ge 25Related Commands
Command
Description
Sets deny conditions for an IPv4 or IPv6 prefix list.
Sets permit conditions for an IPv4 or IPv6 prefix list.
Inserts a helpful remark about a prefix list entry.
Renumbers existing statements and increments subsequent statements.
Displays the contents of the current IPv4 prefix list.
ipv6 prefix-list
To define an IP Version (IPv6) prefix list by name, use the ipv6 prefix-list command in global configuration mode. To remove the prefix list, use the no form of this command.
Syntax Description
Command History
Task ID
Examples
The following example shows how to create a prefix list named list-1:
RP/0/RSP0/CPU0:router# configure RP/0/RSP0/CPU0:router(config)# ipv6 prefix-list list-1 RP/0/RSP0/CPU0:router(config-ipv6-pfx)# 40 permit 2000:1::/64 RP/0/RSP0/CPU0:router(config-ipv6-pfx)# 60 deny 3000:1::/64 RP/0/RSP0/CPU0:router(config-ipv6-pfx)# Uncommitted changes found, commit them? [yes]: y RP/0/RSP0/CPU0:router# show prefix-list ipv6 ipv6 prefix-list list1 40 permit 2000:1::/64 60 deny 3000:1::/64 RP/0/RSP0/CPU0:router#permit (prefix-list)
To set permit conditions for an IP Version 4 (IPv4) or IP Version 6 (IPv6) prefix list, use the permit command in IPv4 prefix list configuration or IPv6 prefix list configuration modes. To remove a condition from a prefix list, use the no form of this command.
[sequence-number] permit network /length [ ge value ] [ le value ] [ eq value ]
no sequence-number permit
Syntax Description
sequence-number
(Optional) Number of the permit statement in the prefix list. This number determines the order of the statements in the prefix list. Range is 1 to 2147483646. By default, the first statement is number 10, and the subsequent statements are incremented by 10.
network / length
Network number and length (in bits) of the network mask.
ge value
(Optional) Specifies a prefix length greater than or equal to the value. It is the lowest value of a range of the length (the “from” portion of the length range).
le value
(Optional) Specifies a prefix length less than or equal to the value. It is the highest value of a range of the length (the “to” portion of the length range).
eq value
(Optional) Exact value of the length .
Command History
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.
Use the permit command to specify conditions under which a packet can pass the prefix list.
The ge, le and eq keywords can be used to specify the range of the prefix length to be matched, for prefixes that are more specific than the network/length argument. Exact match is assumed when neither ge nor le is specified. The range is assumed to be from the ge value to 32 if only the ge keyword is specified. The range is assumed to be from the length to the le value argument if only the le attribute is specified.
A specified ge value or le value must satisfy the following condition:
length < ge value < le value <= 32 (for IPv4)
length < ge value < le value <= 128 (for IPv6)
Task ID
Examples
The following example shows how to permit the prefix 172.18.0.0/16:
RP/0/RSP0/CPU0:router(config)# ipv4 prefix-list list1 RP/0/RSP0/CPU0:router(config-ipv4_pfx)# permit 172.18.0.0/16The following example shows how to accept a mask length of up to 24 bits in routes with the prefix 172.20.10.171/16:
RP/0/RSP0/CPU0:router(config)# ipv4 prefix-list list1 RP/0/RSP0/CPU0:router(config-ipv4_pfx)# permit 172.20.10.171/16 le 24The following example shows how to permit mask lengths from 8 to 24 bits in all address space:
RP/0/RSP0/CPU0:router(config)# ipv6 prefix-list list1 RP/0/RSP0/CPU0:router(config-ipv6_pfx)# permit 2000:1::/64 ge 8 le 24The following example shows how to add permit conditions to list3, then remove the condition with the sequence number 30:
RP/0/RSP0/CPU0:router(config)# ipv6 prefix-list list3 RP/0/RSP0/CPU0:router(config-ipv6_pfx)# permit 2000:1::/64 ge 25 RP/0/RSP0/CPU0:router(config-ipv6_pfx)# permit 3000:1::/64 le 32 RP/0/RSP0/CPU0:router(config-ipv6_pfx)# permit 3000:1::/64 ge 25 Uncommitted changes found, commit them? [yes]: y RP/0/RSP0/CPU0:router#show ipv6 prefix-list ipv6 prefix-list list3 10 permit 2000:1::/64 ge 25 20 permit 3000:1::/64 le 32 30 permit 4000:1::/64 ge 25 RP/0/RSP0/CPU0:router# configure RP/0/RSP0/CPU0:router(config)# ipv6 prefix-list list3 RP/0/RSP0/CPU0:router(config-ipv6_pfx)# no 30 Uncommitted changes found, commit them? [yes]: y RP/0/RSP0/CPU0:router# show prefix-list ipv6 ipv6 prefix-list list3 10 permit 2000:1::/64 ge 25 20 permit 3000:1::/64 le 32 10 deny 2000:1::/64 ge 25 20 deny 3000:1::/64 le 32 30 deny 4000:1::/64 ge 25Related Commands
remark (prefix-list)
To write a helpful comment (remark) for an entry in either an IP Version 4 (IPv4) or IP Version 6 (IPv6) prefix list, use the remark command in IPv4 prefix-list configuration or IPv6 prefix-list configuration modes. To remove the remark, use the no form of this command.
Syntax Description
sequence-number
(Optional) Number of the remark statement in the prefix list. This number determines the order of the statements in the prefix list. The number can be from 1 to 2147483646. (By default, the first statement is number 10, and the subsequent statements are incremented by 10).
remark
Comment that describes the entry in the prefix list, up to 255 characters long.
Command History
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.
Use the remark command to write a helpful comment for an entry in a prefix list. The remark can be up to 255 characters in length; anything longer is truncated.
If you know the sequence number of the remark you want to delete, you can remove it by entering the no sequence-number command.
Use the resequence prefix-list ipv4 command if you want to add statements to an existing IPv4 prefix list.
Task ID
Examples
In the following example, a remark is made to explain a prefix list entry:
RP/0/RSP0/CPU0:router(config)# ipv4 prefix-list deny-ten RP/0/RSP0/CPU0:router(config-ipv4_pfx)# 10 remark Deny all routes with a prefix of 10/8 RP/0/RSP0/CPU0:router(config-ipv4_pfx)# 20 deny 10.0.0.0/8 le 32 RP/0/RSP0/CPU0:router(config-ipv4_pfx)# endIn the following example, a remark is made to explain usage:
RP/0/RSP0/CPU0:router# show prefix-list ipv6 ipv6 prefix-list list1 40 permit 2000:1::/64 60 deny 3000:1::/64 RP/0/RSP0/CPU0:router# configure RP/0/RSP0/CPU0:router(config)# ipv6 prefix-list list1 RP/0/RSP0/CPU0:router(config-ipv6-pfx)# 10 remark use from july23 forward RP/0/RSP0/CPU0:router(config-ipv6-pfx)# Uncommitted changes found, commit them? [yes]: y RP/0/0/CPU0:Apr 4 02:20:34.851 : config[65700]: %LIBTARCFG-6-COMMIT : Configura tion committed by user 'UNKNOWN'. Use 'show commit changes 1000000023' to view the changes. RP/0/0/CPU0:Apr 4 02:20:34.984 : config[65700]: %SYS-5-CONFIG_I : Configured fr om console by console RP/0/RSP0/CPU0:router# show prefix-list ipv6 ipv6 prefix-list list1 10 remark use from july23 forward 40 permit 2000:1::/64 60 deny 3000:1::/64resequence prefix-list ipv4
To renumber existing statements and increment subsequent statements to allow a new prefix list statement (permit, deny, or remark) to be added, use the resequence prefix-list ipv4 command in EXEC mode.
Syntax Description
name
Name of a prefix list.
base
(Optional) Number of the first statement in the specified prefix list, which determines its order in the prefix list. Maximum value is 2147483646.
increment
(Optional) Number by which the base sequence number is incremented for subsequent statements. Maximum value is 2147483646.
Command History
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.
The sequence number of a prefix list entry determines the order of the entries in the list. The router compares network addresses to the prefix list entries. The router begins the comparison at the top of the prefix list, with the entry having the lowest sequence number.
If multiple entries of a prefix list match a prefix, the entry with the lowest sequence number is considered the real match. When a match or deny occurs, the router does not go through the rest of the prefix list.
By default, the first statement in a prefix list is sequence number 10, and the subsequent statements are incremented by 10.
Use the resequence prefix-list ipv4 command to add a permit, deny, or remark statement between consecutive entries in an existing IPv4 prefix list. Specify the first entry number (the base) and the increment by which to separate the entry numbers of the statements. The software renumbers the existing statements, thereby making room to add new statements with the unused entry numbers.
Task ID
Examples
The following example shows how to display the sequence number intervals for prefix list list1, resequence list1 from 10 to 30, and displays the resulting sequence numbers:
RP/0/RSP0/CPU0:router# show prefix-list ipv4 ipv4 prefix-list list1 10 permit 172.20.10.171/16 le 24 20 permit 172.18.0.0/16 30 deny 172.24.20.164/16 ge 25 ipv4 prefix-list list2 10 deny 172.18.30.154/16 ge 25 RP/0/RSP0/CPU0:router# resequence prefix-list ipv4 list1 10 30 RP/0/0/CPU0:Apr 4 02:29:39.513 : ipv4_acl_action_edm[183]: %LIBTARCFG-6-COMMIT : Configuration committed by user 'UNKNOWN'. Use 'show commit changes 10000000 24' to view the changes. RP/0/RSP0/CPU0:router# show prefix-list ipv4 ipv4 prefix-list list1 10 permit 172.20.10.171/16 le 24 40 permit 172.18.0.0/16 70 deny 172.24.20.164/16 ge 25 ipv4 prefix-list list2 10 deny 172.18.30.154/16 ge 25resequence prefix-list ipv6
To renumber existing statements and increment subsequent statements to allow a new prefix list statement (permit, deny, or remark) to be added, use the resequence prefix-list ipv6 command in EXEC mode.
Syntax Description
name
Name of a prefix list.
base
(Optional) Number of the first statement in the specified prefix list, which determines its order in the prefix list. Maximum value is 2147483644.
increment
(Optional) Number by which the base sequence number is incremented for subsequent statements. Maximum value is 2147483644.
Command History
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.
The sequence number of a prefix list entry determines the order of the entries in the list. The router compares network addresses to the prefix list entries. The router begins the comparison at the top of the prefix list, with the entry having the lowest sequence number.
If multiple entries of a prefix list match a prefix, the entry with the lowest sequence number is considered the real match. Once a match or deny occurs, the router does not go through the rest of the prefix list.
By default, the first statement in a prefix list is sequence number 10, and the subsequent statements are incremented by 10.
Use the resequence prefix-list ipv6 command to add a permit, deny, or remark statement between consecutive entries in an existing IPv6 prefix list. Specify the first entry number (the base) and the increment by which to separate the entry numbers of the statements. The software renumbers the existing statements, thereby making room to add new statements with the unused entry numbers.
Task ID
Examples
The following example shows how to display the sequence number intervals for prefix list 1, resequence list1 from 10 to 30, and displays the resulting sequence numbers:
RP/0/RSP0/CPU0:router# show prefix-list ipv6 ipv6 prefix-list list1 10 permit 2000:1:: /16 le 24 20 permit 3000:1::/16 le 32 20 permit 172.18.0.0/16 30 deny 3000:1:: /16 ge 25 ipv6 prefix-list list2 10 deny 4000:1:: /16 ge 25 RP/0/RSP0/CPU0:router# resequence prefix-list ipv4 list1 10 30 RP/0/RSP0/CPU0: Apr 4 02:29:39.513 : ipv6_acl_action_edm [183]: %LIBTARCFG-6-COMMIT : Configuration committed by user 'UNKNOWN'. Use 'show commit changes 10000000 24' to view the changes.show prefix-list
To display information about a prefix list or prefix list entries, use the show prefix-list command in EXEC mode.
Syntax Description
list-name
(Optional) Name of a prefix list.
sequence-number
(Optional) Sequence number of the prefix list entry. Range is 1 to 2147483646.
Command History
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.
Task ID
show prefix-list afi-all
To display the contents of the prefix list for all the address families, use the show prefix-list afi-all command in EXEC mode.
Command History
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.
Task ID
show prefix-list ipv4
To display the contents of current IP Version 4 (IPv4) prefix list, use the show prefix-list ipv4 command in EXEC mode.
Syntax Description
list-name
(Optional) Name of a prefix list.
sequence-number
(Optional) Sequence number of the prefix list entry. Range is 1 to 2147483646.
summary
(Optional) Displays summary output of prefix list contents.
Command History
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.
Use the show prefix-list ipv4 command to display the contents of all IPv4 prefix lists. To display the contents of a specific IPv4 prefix list, use the name argument. Use the sequence-number argument to specify a given prefix list entry. Use the summary keyword to display a summary of prefix list contents.
Task ID
Examples
The following example displays all configured prefix lists:
RP/0/RSP0/CPU0:router# show prefix-list ipv4 ipv4 prefix-list list1 10 permit 172.20.10.171/16 le 24 20 permit 172.18.0.0/16 30 deny 172.24.20.164/16 ge 25 ipv4 prefix-list list2 10 deny 172.18.30.154/16 ge 25The following example uses the list-name argument to display the prefix list named list1:
RP/0/RSP0/CPU0:router# show prefix-list ipv4 list1 ipv4 prefix-list list1 10 permit 172.20.10.171/16 le 24 20 permit 172.18.0.0/16 30 deny 172.24.20.164/16 ge 25The following example uses the list-name and sequence-number argument to display a prefix list named list1 with a sequence number of 10:
RP/0/RSP0/CPU0:router# show prefix-list ipv4 list1 30 ipv4 prefix-list list1 30 deny 172.24.20.164/16 ge 25show prefix-list ipv4 standby
To display the contents of current IPv4 standby access lists, use the show access-lists ipv4 standby command in EXEC mode.
Syntax Description
prefix-list name
(Optional) Name of a particular IPv4 prefix list. The value of the prefix-list-name argument is a string of alphanumeric characters that cannot include spaces or quotation marks.
summary
(Optional) Displays a summary of all current IPv4 standby prefix lists.
Command History
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.
Use the show prefix-list ipv4 standby command to display the contents of current IPv4 standby prefix lists. To display the contents of a specific IPv4 prefix list, use the name argument.
Use the show prefix-list ipv4 standby summary command to display a summary of all standby IPv4 prefix lists.
Task ID
show prefix-list ipv6
To display the contents of the current IP Version 6 (IPv6) prefix list, use the show prefix-list ipv6 command in EXEC mode.
Syntax Description
list-name
(Optional) Name of a prefix list.
sequence-number
(Optional) Sequence number of the prefix list entry. Range is 1 to 2147483646.
summary
(Optional) Displays summary output of prefix list contents.
Command History
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.
Use the show prefix-list ipv6 command to display the contents of all IPv4 prefix lists.
To display the contents of a specific IPv6 prefix list, use the name argument. Use the sequence-number argument to specify a given prefix list entry. Use the summary keyword to display a summary of prefix list contents.
Task ID
Examples
The following example shows how to display all configured prefix lists:
RP/0/RSP0/CPU0:router# show prefix-list ipv6 ipv6 prefix-list list1 10 permit 5555::/24 20 deny 3000::/24 30 permit 2000::/24 ipv6 prefix-list list2 10 permit 2000::/24The following example uses the list-name argument to display the prefix list named list1:
RP/0/RSP0/CPU0:router# show prefix-list ipv6 list1 ipv6 prefix-list list1 10 permit 5555::/24 20 deny 3000::/24 30 permit 2000::/24The following example uses the list-name and sequence-number argument to display a prefix list named list1 with a sequence number of 10:
RP/0/RSP0/CPU0:router# show prefix-list ipv6 list1 10 ipv6 prefix-list abc 10 permit 5555::/24The following example displays a summary of prefix list contents:
RP/0/RSP0/CPU0:router# show prefix-list ipv6 summary Prefix List Summary: Total Prefix Lists configured: 2 Total Prefix List entries configured: 2
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