Cisco ASR 5000 Series, Обзор продукта

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PDN Gateway Overview
Features and Functionality - Optional Enhanced Feature Software ▀
Cisco ASR 5000 Series Product Overview ▄
OL-22938-02
Chassis configured to support Interchassis Session Recovery communicate using periodic Hello messages.
These messages are sent by each chassis to notify the peer of its current state. The Hello message contains
information about the chassis such as its configuration and priority. A dead interval is used to set a time limit
for a Hello message to be received from the chassis' peer. If the standby chassis does not receive a Hello
message from the active chassis within the dead interval, the standby chassis transitions to the active state. In
situations where the redundancy link goes out of service, a priority scheme is used to determine which chassis
processes the session. The following priority scheme is used:
router identifier
chassis priority
SPIO MAC address
Checkpoint Messages
Checkpoint messages are sent from the active chassis to the inactive chassis. Checkpoint messages are sent at
specific intervals and contain all the information needed to recreate the sessions on the standby chassis, if that
chassis were to become active. Once a session exceeds the checkpoint duration, checkpoint data is collected on
the session. The checkpoint parameter determines the amount of time a session must be active before it is
included in the checkpoint message.
License Keys: The part number and cost will be determined two months before First Customer Shipment.
Important:
For more information on inter-chassis session recovery support, refer to the Interchassis Session
Recovery chapter in the System Enhanced Feature Configuration Guide .
IP Security (IPSec) Encryption
Enables network domain security for all IP packet switched LTE-EPC networks in order to provide confidentiality,
integrity, authentication, and anti-replay protection. These capabilities are insured through use of cryptographic
techniques.
The Cisco P-GW supports IKEv1 and IPSec encryption using IPv4 addressing. IPSec enables the following two use
cases:
Encryption of S8 sessions and EPS bearers in roaming applications where the P-GW is located in a separate
administrative domain from the S-GW
IPSec ESP security in accordance with 3GPP TS 33.210 is provided for S1 control plane, S1 bearer plane and S1
management plane traffic. Encryption of traffic over the S1 reference interface is desirable in cases where the
EPC core operator leases radio capacity from a roaming partner's network.
Important:
For more information on IPSec support, refer to the IP Security chapter in the System Enhanced
Feature Configuration Guide .