Cisco Cisco Packet Data Gateway (PDG)
P-GW Changes in Release 16
P-GW Enhancements for 16.1 ▀
Release Change Reference, StarOS Release 16 ▄
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Important:
The
unconnected-address next-system
ip address
keyword must be enabled to support the
downlink IPv4 data packets forwarding/redirection.
CSCuj73344 - PGW: IPv6 Network Reachability Server for IPv6 Pools
Feature Changes
IPv6 Network Reachability Server for IPv6 Pools
Previously, the NW-Reachability detection was available only for IPv4 addresses. This feature has introduced NW-
Reachability detection for IPv6 address as well. This feature has also introduced VRF support for NW-Reachability
detection.
Reachability detection for IPv6 address as well. This feature has also introduced VRF support for NW-Reachability
detection.
This new configuration is used to restrict IP address allocation from a pool if the configured nw-reachability-server is
not accessible. If the configure nw-reachability-server is not accessible, then the P-GW should not assigning the address
for a new call. Instead, the P-GW will respond back sending a GTPv2 “Create Session Response” with
NO_RESOURCE_AVAILABLE.
not accessible. If the configure nw-reachability-server is not accessible, then the P-GW should not assigning the address
for a new call. Instead, the P-GW will respond back sending a GTPv2 “Create Session Response” with
NO_RESOURCE_AVAILABLE.
For IPv4, ICMP pings are used for reachability checking. Usually, this configuration is used along with the next-hop-
forwarding address configuration. Also, the nw-reachability server is normally an ISP server beyond the next-hop.
forwarding address configuration. Also, the nw-reachability server is normally an ISP server beyond the next-hop.
Command Changes
nw-reachability server
This command includes a new
vrf
keyword to specify an existing VRF name as an alphanumeric string of 1 through 63
characters.
configure
context context_name
nw-reachability server server_name
vfr name
end
show nw-reachability server
This command includes two new keywords
ipv4-only
and
ipv6-only
to display 1Pv4/IPv6 Network Reachability
Detection servers.
configure
show nw-reachability server server_name
ipv4-only
ipv6-only