Nokia 7210 SAS-M User Manual

7210 SAS-M, T, R6, R12, Mxp, Sx, S Basic System
Configuration Guide
System Management
Edition: 01 3HE 16132 AAAB TQZZA 261
6.2.1.1.6 Accounting Configuration Redundancy on 7210 SAS-R6 and
7210 SAS-R12
When there is a switchover and the standby CFM/CPM becomes active, the
accounting servers are checked and if they are administratively up and capable of
coming online (media present, and others), the standby is brought online; new
accounting files are created at this point. Users must manually copy the accounting
records from the failed CFM/CPM.
6.2.1.2 Nonstop Forwarding and Routing on 7210 SAS-R6 and
7210 SAS-R12
In a control plane failure or a forced switchover event, the router continues to forward
packets using the existing stale forwarding information. Nonstop forwarding requires
clean control plane and data plane separation. Usually the forwarding information is
distributed to the IMMs.
6.2.1.2.1 Nonstop Forwarding on 7210 SAS-R6 and 7210 SAS-R12
In a control plane failure or a forced switchover event, the router continues to forward
packets using the existing stale forwarding information.
Nonstop forwarding is used to notify peer routers to continue forwarding and
receiving packets, even if the route processor (control plane) is not working or is in a
switch-over state. Nonstop forwarding requires clean control plane and data plane
separation and usually the forwarding information is distributed to the line cards.
This method of availability has both advantages and disadvantages. Nonstop
forwarding continues to forward packets using the existing stale forwarding
information during a failure. This may cause routing loops and black holes;
surrounding routers must adhere to separate extension standards for each protocol.
Each vendor must support protocol extensions for router interoperability.

Nokia 7210 SAS-M Specifications

General

Brand	Nokia
Model	7210 SAS-M
Category	Cell Phone
Language	English