Cisco Cisco ASR 5700
APN Configuration Mode Commands
ip address pool-exhaust-action ▀
Command Line Interface Reference, StarOS Release 17 ▄
1363
ip address pool-exhaust-action
Configures the behavior to accept/reject a call if the IPv4 address pool is exhausted.
Product
GGSN
P-GW
SAEGW
Privilege
Security Administrator, Administrator
Mode
Exec > Global Configuration > Context Configuration > APN Configuration
configure > context context_name > apn apn_name
Entering the above command sequence results in the following prompt:
[context_name]host_name(config-apn)#
Syntax
ip address pool-exhaust-action { ipv6-accept | ipv6-reject }
ipv6-accept
GGSN/P-GW will not reject the call; follows the standard behavior of allocating the available IP address.
ipv6-reject
Enables rejecting a call if GGSN/P-GW cannot allocate the IPv4 address for PDN type IPv4v6.
Usage
As per the standard behavior, when a UE sends a Create Request to GGSN/P-GW with PDN type IPv4v6, it
should allocate both IPv4 and IPv6 address to the UE. If GGSN/P-GW fails to allocate the IPv4 address due
to IP pool exhaustion, then it allocates only IPv6 address and changes the PDN Type to IPv6 and the call
continues. In order to control this behavior, this CLI has been introduced; when configured, the following
behavioral scenarios will be in place:
should allocate both IPv4 and IPv6 address to the UE. If GGSN/P-GW fails to allocate the IPv4 address due
to IP pool exhaustion, then it allocates only IPv6 address and changes the PDN Type to IPv6 and the call
continues. In order to control this behavior, this CLI has been introduced; when configured, the following
behavioral scenarios will be in place:
CLI executed with
ipv6-reject
option will reject a call if GGSN/P-GW cannot allocate the IPv4
address for PDN type IPv4v6.
CLI executed with
ipv6-accept
option will not reject a call and follow the standard behavior.
Example
The following command will reject a call if IPv4 type address allocation is not possible by GGSN/P-GW:
ip address pool-exhaust-action ipv6-reject