10-8
Cisco SCE 2000 and SCE 1000 Software Configuration Guide
OL-7827-12
Chapter 10 Redundancy and Fail-Over
Recovery
Step 5 Make sure that the SCE platforms have synchronized and active SCE platform was selected. Use the
show interface linecard 0 connection-mode command.
Step 6 If you want to start with bypass/sniffing, change the link mode to your required mode in both SCE
platforms on both links. The bypass mode will be applied only to the active SCE platform. (See About
the Link Mode, page 7-6.)
Step 7 Make sure that the link mode is as you required. (See Monitoring a Cascaded System, page 10-11.) Use
the show interface linecard 0 link mode command.
Step 8 Connect the traffic port of SCE platform #1. This will cause a momentary down time until the network
elements from both sides of the SCE platform auto-negotiate with it and start working (when working
inline).
Step 9 Connect the traffic port of SCE platform #2, this will cause a momentary down time until the network
elements from both sides of the SCE platform auto-negotiate with it and start working (when working
inline).
Step 10 When full control is needed, change the link mode on both SCE platforms on both links to ‘forwarding’.
It is recommended to first configure the active SCE platform and then the standby. (See About the Link
Mode, page 7-6.)
Step 11 You can now start working with the Subscriber Manager.
Recovery
• Replacing the SCE platform (manual recovery), page 10-9
• Reboot only (fully automatic recovery), page 10-9
This section specifies the procedure for recovery after a failure. The purpose of the recovery procedure
is to restore the system to fully functional status. After the recovery procedure, the behavior of the
system is the same as after installation.
A failed SCE platform may either recover automatically or be replaced (manual recovery). Whether
recovery is automatic or manual depends on the original cause of the failure:
• Power failure — manual or automatic recovery can be implemented.
• Any failure resulting in a reboot — manual or automatic recovery can be implemented (this is
configurable).
• 3-consecutive reboots within half an hour — manual recovery only
• Cascade ports link-failure — automatic recovery when link revives.
• Traffic link failure — automatic recovery when link revives.
• Failure in the communications with the SM — automatic by SM decisions after connection is
re-established.
• Hardware malfunction — manual recovery, after replacing the malfunctioning SCE platform.
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