Cisco Cisco Packet Data Interworking Function (PDIF)
APN Configuration Mode Commands
ipv6 address pool-exhaust-action ▀
Command Line Interface Reference, StarOS Release 18 ▄
1391
ipv6 address pool-exhaust-action
Configures the behavior to accept/reject a call if the IPv6 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
ipv6 address pool-exhaust-action { ipv4-accept | ipv4-reject }
ipv4-accept
GGSN/P-GW will not reject the call; follows the standard behavior of allocating the available IP address.
ipv4-reject
Enables rejecting a call if GGSN/P-GW cannot allocate the IPv6 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 IPv6 address due to IP pool
exhaustion, then it allocates only IPv4 address and changes the PDN Type to IPv4 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:
allocate both IPv4 and IPv6 address to the UE. If GGSN/P-GW fails to allocate the IPv6 address due to IP pool
exhaustion, then it allocates only IPv4 address and changes the PDN Type to IPv4 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
ipv4-reject
option will reject a call if GGSN/P-GW cannot allocate the IPv6 address for
PDN type IPv4v6.
CLI executed with
ipv4-accept
option will not reject a call and follow the standard behavior.
Example
The following command will reject a call if IPv6 type address allocation is not possible by GGSN/P-GW:
ipv6 address pool-exhaust-action ipv4-reject