SaMOG Local P-GW
This feature enables the SaMOG
Gateway to configure and use local P-GW addresses either as a fall-back
selection method to static and dynamic P-GW selection, or as the preferred
The following sections
provide more detailed information:
The SaMOG Gateway
allocates P-GW to provide PDN connectivity to the User Equipment (UEs). The
P-GW address is either selected based on the address provided by the AAA server
(static selection) or by using DNS resolution (dynamic selection). With this
feature, the SaMOG Gateway can support P-GW addresses that are configured
locally under the APN Profile Configuration Mode. SaMOG can use these locally
configured P-GW addresses in one of the following ways:
Local P-GW as a
Fall-back Selection Method
When the local P-GW
address is configured under the APN Profile Configuration Mode, the SaMOG
Gateway will perform local P-GW selection during the following circumstances:
The configuration under the MRME Service Configuration Mode is
enabled, and the AAA Server identifies P-GW selection as dynamic. In this case,
the locally configured P-GW addresses under the APN Profile Configuration Mode
If session creation with the locally configured P-GW addresses
fails, the SaMOG Gateway performs DNS procedures.
The P-GW addresses received by DNS resolution are unreachable, and
P-GW addresses are locally configured under the APN Profile Configuration mode.
In this case, the locally configured P-GW addresses are tried even when the
configuration under the MRME Service Configuration Mode is not enabled.
The DNS server is not reachable, or the DNS query is rejected.
DNS resolution is not configured, and/or the AAA server does not
send the P-GW address.
Local P-GW as the
Preferred Selection Method
The SaMOG Gateway can also be
configured to use the local P-GW addresses for P-GW node selection as the
preferred selection method. When enabled, SaMOG ignores the P-GW address
provided by the AAA server or the DNS, and uses the locally configured P-GW
How Local P-GW
Address Support Works
The SaMOG Gateway performs local
P-GW address selection based on the weight that is configured for each P-GW
address (similar to DNS resolution of P-GW addresses). Only the first P-GW
address is selected based on its weight. The rest of the addresses are selected
on a round-robin basis starting from the next available P-GW address, rounding
to the P-GW address before the first selected P-GW address. A maximum of 16
IPv4 and/or IPv6 local P-GW addresses can be configured.
In this release, the SaMOG Gateway
does not support dual bind (IPv4 and IPv6) address for EGTP service (or GTPU
pgw-address command under the APN Profile
Configuration Mode to define local P-GW addresses for load balancing.
pgw-address ipv4_address weight weight
pgw-address ipv6_address weight weight
ipv4/v6_address command to disable the
P-GW address(es) configured for an APN profile.
ipv4_address must be an IPv4 address
expressed in dotted-decimal notation.
ipv6_address must be an IPv6 address
expressed in colon (or double-colon) notation.
A maximum of 16 P-GW IPv4 and/or IPv6 addresses can be configured
for an APN profile.
When multiple P-GW addresses are configured, only the first P-GW
will be selected based on the weight. The rest of the P-GW addresses are
selected using the round-robin mechanism
Preferred Selection as Local P-GW
command under the MRME Service Configuration Mode to set the P-GW address
selection from a local configuration as the preferred selection mechanism.
local-configuration-preferred command to disable this command.
this command is disabled. The SaMOG Gateway uses DNS-based P-GW selection
(dynamic selection) as the preferred selection method.
command is enabled, the P-GW address provided by the AAA Server (static
selection) and DNS procedures (dynamic selection) are ignored.
Configuration for Local P-GW Support
show apn-profile full all
show apn-profile command to verify the
configured P-GW IP address(es).
IP-Address : 6666::200:1
S5-S8-Protocol : N/A
Weight : 1
IP-Address : 6666::a00:1
S5-S8-Protocol : N/A
Weight : 17
show mrme-service name
show mrme-service name command to verify the
status of the local P-GW selection configuration.
Preferred PGW selection mechanism : Local
This section provides information
on the show commands available to monitor the local P-GW selection.
Selection Show Command(s) and/or Outputs
show samog-service statistics
The following fields are available
to the output of the
show samog-service statistics command in
support of this feature.
Local PGW Fallback Stats:
Success: 0 No Alternate GW: 0
show samog-service statistics Command Output
Local PGW Fallback Stats
Total number of local P-GW fall-back attempted.
Total number of successful local P-GW fall-back achieved.
No Alternate GW
Total number of alternative Gateways available for fall-back.