Cisco ASR 5000 Series, Обзор продукта

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Packet Data Interworking Function Overview
▀ Features and Functionality - Base Software
▄ Cisco ASR 5000 Series Product Overview
OL-22938-02
IPv6 Static Routing
Native IPv6 routing allows the forwarding of IPv6 packets between IPv6 networks. The forwarding lookup is based on
destination IPv6 address longest prefix match.
PDIF supports configuration of static routes including a default route. If a default route is configured, all IPv6 traffic is
forwarded to the configured next-hop defined by the default route.
Port-Switch-On-L3-Fail for IPv6
IPv4 port failover redundancy if L3 connectivity is lost is extended to support IPv6 addresses.
For more information on configuring port-switch-on-l3-fail, see Ethernet Interface Configuration Commands in the
Command Line Interface Reference and Creating and Configuring Ethernet Interfaces and Ports in the System Element
Configuration Procedures section of the System Administration Guide.
IKEv2 Keep-Alive (Dead Peer Detection (DPD))
PDIF supports DPD protocol messages originating from both the MS and the PDIF/FA. DPD is configured on a per-
PDIF-service basis. The administrator can also disable DPD and the PDIF/FA does not initiate DPD exchanges with the
MS when disabled. However, the PDIF/FA always responds to DPD availability checks initiated by the MS regardless
of the PDIF/FA idle timer configuration.
Important:
For a number of failure scenarios involving Dead Peer Detection, refer to the Troubleshooting
chapter.
Congestion Control and Overload Disconnect
Congestion control is an operator-configurable facility. When the PDIF chassis reaches certain limits (based on CPU
utilization, port utilization, and other controls) the system enters a congested state. When in a congested state, existing
calls are not impacted but new calls are potentially restricted.There is a separate subscriber-level configuration to
enable/disable the feature on a per-subscriber basis. There is also a subscriber-level configurable for
and thresholds to remove some old and abandoned calls from the system.
The disconnection scenario is as follows:
If only is configured, sessions exceeding this threshold would be selected for
disconnection.
If only is configured, sessions exceeding this threshold would be selected for
disconnection.
If both and are configured, sessions with an idle-
time greater than the idle-time threshold and a connect-time greater than the connect-time-threshold would be
selected for disconnection.