Cisco Cisco Packet Data Gateway (PDG) Nota Di Rilascio
P-GW Changes in Release 15.0
▀ P-GW Enhancements for September 30, 2013
▄ Cisco ASR 5x00 Release Change Reference
406
HSGW: STa, S2a, Rf
ePDG: SWn, SWm, S2b
Default Behavior of UDP Checksum Optimization
Previous Behavior: By default, UDP checksum was enabled, but no optimization attempted.
New Behavior: By default, attempt optimization of UDP checksum in UDP header of GTP-U packet using inner
payload transport checksum.
payload transport checksum.
DNS Support for IPv4/IPv6 PDP Contexts
Previous Behavior: P-GW was supporting DNS for IPv4 PDP context only.
New Behavior: This feature adds functionality in P-GW for PDN type IPv4v6. Previously, if an MS requested an IPv4
DNS address, P-GW did not send the IPv4 DNS address.
DNS address, P-GW did not send the IPv4 DNS address.
MS may request for DNS server IPv4 or IPv6 addresses using the Protocol Configurations Options IE (as a container or
as part of IPCP protocol configuration request) in PDP Context Activation procedure for PDP Type IPv4, IPv6, or
IPv4v6. In that case, the P-GW may return the IP address of one or more DNS servers in the PCO IE in the PDP
Context Activation Response message. The DNS address(es) shall be coded in the PCO as specified in 3GPP TS 24.008.
as part of IPCP protocol configuration request) in PDP Context Activation procedure for PDP Type IPv4, IPv6, or
IPv4v6. In that case, the P-GW may return the IP address of one or more DNS servers in the PCO IE in the PDP
Context Activation Response message. The DNS address(es) shall be coded in the PCO as specified in 3GPP TS 24.008.
For PDP Type IPv4v6, if MS requested DNS server IPv4 address, it did not return anIPv4 address. Support is now
added to respond with address requested by MS.
added to respond with address requested by MS.
AAA server may also provide DNS Server IP Address in Access-Accept Auth Response. In such cases, AAA provided
DNS server IPs takes priority over the one configured under APN.
DNS server IPs takes priority over the one configured under APN.
When DNS server address is requested in PCO configuration, the following preference would be followed:
1. DNS values received from RADIUS Server.
2. DNS values locally configured with APN.
3. DNS values configured at context level with
2. DNS values locally configured with APN.
3. DNS values configured at context level with
ip name-servers
CLI.
DSCP Marking - GTP-U on per APN Basis
This feature provides the flexibility to have a different DSCP marking table on per APN basis so that traffic on each of
the APNs can be marked differently, depending on the needs of the APN.
the APNs can be marked differently, depending on the needs of the APN.
The P-GW supports configurable DSCP marking of the outer header of a GTP-U tunnel packet based on a QCI/THP
table for the S5/S8 and Gn/Gp interfaces. This feature allows configuring DSCP marking table on a per APN basis.
table for the S5/S8 and Gn/Gp interfaces. This feature allows configuring DSCP marking table on a per APN basis.
Previously, DSCP marking table was configured on P-GW service level. As part of this requirement, new CLI has been
added to associate the qos-qci-mapping table in APN.
added to associate the qos-qci-mapping table in APN.
In order to be backward compatible with old configuration, if a DSCP marking table is associated with P-GW service
and not with the APN, then the one in P-GW service will be used. If table is associated in both P-GW service and APN,
then the one on APN will take precedence.
and not with the APN, then the one in P-GW service will be used. If table is associated in both P-GW service and APN,
then the one on APN will take precedence.
Enhanced Granularity for Enabling S6b with a P-GW Service
CLI command
authorize-with-hss
has been enhanced for greater P-GW S6b interface authorization control.
GnGp Issue Resolved for GTP Echo Configuration Per Interface
SM informs eGTP-C stack if the peer node is part of same PLMN (home) or differen PLMN (roamer/vistor) based on
MNC/MCC to avoid running APN-OI matching alogrithm again.
MNC/MCC to avoid running APN-OI matching alogrithm again.