Cisco Cisco Packet Data Gateway (PDG) Guida Alla Risoluzione Dei Problemi
GGSN Service Configuration Procedures
IP Address Pool Configuration on the System ▀
Cisco ASR 5000 Series Gateway GPRS Support Node Administration Guide ▄
OL-22944-01
IP Address Pool Configuration on the System
Before an MS is able to access data services, they must have an IP address. As described previously, the GGSN supports
static or dynamic addressing (through locally configured address pools on the system, DHCP client-mode, or DHCP
relay-mode). Regardless of the allocation method, a corresponding address pool must be configured.
static or dynamic addressing (through locally configured address pools on the system, DHCP client-mode, or DHCP
relay-mode). Regardless of the allocation method, a corresponding address pool must be configured.
IP addresses can be dynamically assigned from a single pool/a group of IP pools/a group of IP pool groups. The
addresses/IP pools/ IP pool groups are placed into a queue in each pool or pool group. An address is assigned from the
head of the queue and, when released, returned to the end. This method is known as least recently used (LRU).
addresses/IP pools/ IP pool groups are placed into a queue in each pool or pool group. An address is assigned from the
head of the queue and, when released, returned to the end. This method is known as least recently used (LRU).
When a group of pools have the same priority, an algorithm is used to determine a probability for each pool based on the
number of available addresses, then a pool is chosen based on the probability. This method, over time, allocates
addresses evenly from the group of pools.
number of available addresses, then a pool is chosen based on the probability. This method, over time, allocates
addresses evenly from the group of pools.
I
MPORTANT
:
Setting different priorities on each individual pool can cause addresses in some pools to be used
more frequently.
I
MPORTANT
:
This section provides the minimum instruction set for configuring local IP address pools on the
system. For more information on commands that configure additional parameters and options, refer ip pool command
section in Context Configuration Mode Commands chapter of Command Line Interface Reference.
section in Context Configuration Mode Commands chapter of Command Line Interface Reference.
These instructions assume that you have already configured the system level configuration as described in System
Administration Guide and GGSN service as described in GGSN Service Configuration section of this chapter.
Administration Guide and GGSN service as described in GGSN Service Configuration section of this chapter.
To configure the IP pool:
Step 1
Create the IP pool for IPv4 addresses in system context by applying the example configuration in the IPv4 Pool
Creation section.
Creation section.
Step 2
Optional. Configure the IP pool for IPv6 addresses in system context by applying the example configuration in the IPv6
Pool Creation section.
Pool Creation section.
Step 3
Verify your IP pool configuration by following the steps in the IP Pool Configuration Verification section.
Step 4
Save your configuration as described in the Verifying and Saving Your Configuration chapter.
IPv4 Pool Creation
Use the following example to create the IPv4 address pool:
Notes: