Defining Dhcp Odaps As The Global Default Pooling Mechanism; Configuring The Dhcp Pool As An Odap - Cisco 10000-2P2-2DC Software Configuration Manual

Chapter 10 Configuring Address Pools

Defining DHCP ODAPs as the Global Default Pooling Mechanism

To specify on-demand address pooling as the global default mechanism, enter the following command
in global configuration mode:
Command
Router(config)# ip address-pool dhcp-pool
The DHCP server needs to be able to distinguish between a normal DHCP address request and an address
Note
request for a PPP client. For more information, see the
on page
Example 10-1
PPP clients. The locally configured VRF-associated DHCP pool named Green_pool provides the
IP addresses.
Example 10-1 Defining DHCP ODAPs as the Global Default Pooling Mechanism
!
ip address-pool dhcp-pool
!
ip dhcp pool Green_pool
!

Configuring the DHCP Pool as an ODAP

To configure a DHCP pool as an on-demand address pool, enter the following commands beginning in
global configuration mode:
Command
Step 1
Router(config)# ip dhcp pool name
Step 2
Router(config-dhcp)# vrf name
Step 3
Router(config-dhcp)# origin {dhcp | aaa |
ipcp} [subnet size initial size [autogrow
size]]
Step 4
Router(config-dhcp)# utilizationmark low
percentage-number
Step 5
Router(config-dhcp)# utilization mark
high percentage-number
Example 10-2
green_pool address pool is associated with the Green VRF and the red_pool address pool is associated
with the Red VRF. Both pools obtain their subnet addresses from an external DHCP server.
OL-2226-23
10-5.
enables on-demand address pooling as the mechanism to service address requests from
configures two on-demand DHCP address pools: green_pool and red_pool. The
Purpose
Enables on-demand address pooling as the global default IP
address mechanism for PPP remote access sessions into MPLS
VPNs. Locally configured VRF-associated DHCP pools allocate
IP addresses.
"Address Allocation for PPP Sessions" section
Purpose
Configures a DHCP address pool on a Cisco IOS DHCP server
and enters DHCP pool configuration mode.
Associates the address pool with a VRF.
Configures an address pool as an on-demand address pool.
Sets the low utilization mark of the pool size. The default value is
zero percent.
Sets the high utilization mark of the pool size. The default value
is 100 percent.
Cisco 10000 Series Router Software Configuration Guide
On-Demand Address Pool Manager
10-7