Release Note для Cisco Cisco Packet Data Gateway (PDG)
GGSN Changes in Release 15.0
▀ GGSN Enhancements for September 30, 2013
▄ Cisco ASR 5x00 Release Change Reference
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The GGSN 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.
In order to be backward compatible with old configuration, if a DSCP marking table is associated with GGSN service
and not with the APN, then the one in GGSN service will be used. If table is associated in both GGSN service and APN,
then the one on APN will take precedence.
and not with the APN, then the one in GGSN service will be used. If table is associated in both GGSN service and APN,
then the one on APN will take precedence.
Refer to the GGSN Command Changes section for the new CLI.
DHCPv6 Prefix Delegation
Previous Behavior: DHCPv6 Prefix delegation was not supported on GGSN prior to release 15.0
New Behavior: From 15.0 onward GGSN supports DHCPv6 Prefix Delegation.
DHCPv6 prefix delegation is required to support deployment models where multiple IPv6 prefixes can be delegated to
the UE and which can be further subnetted by the UE and assigned to the links in its internal network. UE will act as a
IPv6 router here and will be responsible for just prefix delegation or for prefix delegation along with address assignment
and other configuration information. DHCPv6 prefix delegation will allow prefixes to be delegated to the UE
independent of bearer establishment and thus without requiring any changes to the mobility signaling protocols.
the UE and which can be further subnetted by the UE and assigned to the links in its internal network. UE will act as a
IPv6 router here and will be responsible for just prefix delegation or for prefix delegation along with address assignment
and other configuration information. DHCPv6 prefix delegation will allow prefixes to be delegated to the UE
independent of bearer establishment and thus without requiring any changes to the mobility signaling protocols.
Refer to the GGSN Command Changes section for the new CLI.
GTP Throttling
Previous Behavior: Prior to 15.0, the GGSN was not supporting GTP throttling.
New Behavior: From 15.0 onward, the GGSN supports PDP throttling to help control the rate of incoming/outgoing
messages on GGSN. This functionality is used in ensuring GGSN doesn’t get overwhelmed by the GTP control plane
messages. Also it will help in ensuring the GGSN will not overwhelm the peer GTP-C node with GTP Control plane
messages.
messages on GGSN. This functionality is used in ensuring GGSN doesn’t get overwhelmed by the GTP control plane
messages. Also it will help in ensuring the GGSN will not overwhelm the peer GTP-C node with GTP Control plane
messages.
This feature covers over-load protection of GGSN nodes and other external nodes with which it communicates.
External node overload can happen in a scenario where GGSN generates signaling requests at a higher rate than other
nodes can handle. Also if the incoming rate is high at GGSN node, we might flood any of the external nodes. Hence
throttling of both incoming and outgoing control messages is required.
nodes can handle. Also if the incoming rate is high at GGSN node, we might flood any of the external nodes. Hence
throttling of both incoming and outgoing control messages is required.
Important:
GTP throttling will be done only for session level control messages. Path management messages will
not be rate limited.
Refer to the GGSN Command Changes section for the new and modified CLIs.
Important:
This feature is license dependent. Please contact your local sales representative for more
information.
Network Mobility (NEMO) Support
Previous Behavior: NEMO (NEtwork MObility) provides wireless connectivity between enterprise core network and
remote sites over 3G/4G network. The wireless connection can be used as either primary link or backup link. All the
hosts in the remote site can directly communicate with hosts in the core network without using NAT.
remote sites over 3G/4G network. The wireless connection can be used as either primary link or backup link. All the
hosts in the remote site can directly communicate with hosts in the core network without using NAT.
Enterprise VPN service is one of the main use case for this feature. Fast deployment, flexible bandwidth arrangement
for customers are some of the advantages of this service. Customers include banks, financial institutions, multi-sited
for customers are some of the advantages of this service. Customers include banks, financial institutions, multi-sited