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Cisco 10000 Series Router Software Configuration Guide
OL-2226-23
Chapter 10 Configuring Address Pools
Overlapping IP Address Pools
The Overlapping IP Address Pools feature is described in the following topics:
• Feature History for Overlapping IP Address Pools, page 10-17
• Restrictions for Overlapping IP Address Pools, page 10-17
• Configuration Tasks for Overlapping IP Address Pools, page 10-17
• Verifying Local Pool Groups for IP Overlapping Address Pools, page 10-18
• Configuration Examples for Overlapping IP Address Pools, page 10-18
Feature History for Overlapping IP Address Pools
Restrictions for Overlapping IP Address Pools
The software checks for duplicate addresses on a per-group basis. This means that you can configure
pools in multiple groups that could have possible duplicate addresses. You should only use this feature
in environments such as MPLS VPN where multiple IP address spaces are supported.
Configuration Tasks for Overlapping IP Address Pools
To configure the IP overlapping address pools feature, configure a local pool group as described in
“Configuring a Local Pool Group for IP Overlapping Address Pools”.
Configuring a Local Pool Group for IP Overlapping Address Pools
To configure a local pool group, enter the following command in global configuration mode:
Cisco IOS Release Description Required PRE
12.2(4)BZ1 This feature was introduced on the Cisco 10000 series
router.
PRE1
12.3(7)XI1 This feature was integrated into Cisco IOS Release
12.3(7)XI1.
PRE2
12.2(28)SB This feature was integrated into Cisco IOS Release
12.2(28)SB.
PRE2
Command Purpose
Router(config)# ip local pool pool-name start-IP
[end-IP] [group group-name] [cache-size size]
Configures a group of local IP address pools, gives the group a
name, and specifies a cache size.