Cisco ASR 9000 Series Command Reference

prefix-length
To specify the length of the prefix that is assigned to the client, use the prefix-length command in IPv6
configuration submode. To remove the length of the prefix, use the no form of this command.
prefix-length prefix_length
no prefix-length prefix_length
Syntax Description
Specifies the length of the prefix.
prefix_length
Command Default
None
Command Modes
Pool IPv6 configuration
Command History
ModificationRelease
This command was introduced.Release 4.3.0
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes appropriate task
IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator
for assistance.
Use the pool ipv6 command to enter ipv6 pool configuration submode.
The prefix-length command under the pool ensures all the prefixes (described in the prefix-range section)
in the pool have the same length. The prefix-length command must be configured when the network and the
prefix-length commands are used.
Task ID
OperationTask ID
read, writeip-services
Examples
This is an example of configuring the prefix-length command in the IPv6 configuration submode:
RP/0/RSP0/CPU0:router# configure
RP/0/RSP0/CPU0:router(config)# pool vrf vrf1 ipv6 pool3
RP/0/RSP0/CPU0:router(config-pool-ipv6)# prefix-length 50
Cisco ASR 9000 Series Aggregation Services Router Broadband Network Gateway Command Reference,
Release 5.2.x
86
Address Pool Service Commands
prefix-length

Cisco ASR 9000 Series Specifications

General

Series	ASR 9000
Category	Network Router
Modular Design	Yes
Redundancy	Yes (Hardware and Software)
Operating System	Cisco IOS XR
Interfaces/Ports	10G, 40G, 100G, 400G Ethernet
Expansion Slots	Varies by model
Routing Protocol	BGP, OSPF, IS-IS, EIGRP
Management	CLI, SNMP, NETCONF
Power Supply	Redundant
Port Density	Varies by model
Power Supply Options	AC, DC
Memory	Varies by model
Storage	Varies by model
Dimensions	Varies by model
Weight	Varies by model