Forcing Failover In A Redundant Pair; Managing System Boot Parameters - Cisco 10008 Installation And Configuration Manual

Forcing Failover in a Redundant Pair

Example 4
router# sh network-clocks ssm
SSM Codes:
S/SS
-/-
1/0
7/0
7/1
Example 5
Router(config)# network-clock select 6 slot pre-a t1 ?
esf
sf
Router(config)# network-clock select 6 slot pre-a t1 esf ?
ami
b8zs
Example 6
Router(config)# network-clock select 6 slot pre-a e1 ?
crc4
no-crc4
Router(config)# network-clock select 6 slot pre-a e1 crc4 ?
ami
hdb3
Forcing Failover in a Redundant Pair
To manually force the active and standby devices in a redundant pair to failover, use the redundancy
force-switchover main-cpu command. Manually force the active and standby PRE4 to reverse roles if
you need to replace the active one. You can then replace the PRE4 while causing only minimal disruption
of traffic.
The following example shows how to set the standby PRE4 to be active:
Router# redundancy force-switchover main-cpu
This command does not generate an alarm.

Managing System Boot Parameters

During the boot process, the system reads a software configuration register that defines certain system
parameters. The software configuration register is a 16-bit register in NVRAM used to define such
characteristics as:
•
•
Cisco 10008 Router PRE4 Installation and Configuration Guide
24
Show SSM Codes Received
Clock Source Source Card
Slot pre-a loc PRE
none 4jacket-1
T3 7/0/0 4cht3-hh-1
Serial7/1/0/1:0 4cht3-hh-1
PRE4 T1 BITS Input Configuration
ESF Framing
SF Framing
AMI Line Coding
B8ZS Line Coding
PRE4 E1 BITS Input Configuration
CRC4 Framing
No CRC4 Framing
AMI Line Coding
HDB3 Line Coding
The source of the Cisco IOS software image required to run the router
Whether the system software should ignore the contents of NVRAM
Rcv SSM (code)
n/a (0xFF)
n/a (0xFF)
n/a (0xFF)
n/a (0xFF)
OL-13840-01