Setup guide

5-5
Cisco 6400 Software Setup Guide
OL-1183-04
Chapter5 Redundancy and SONET APS Configuration
NSP Redundancy
Verifying Synchronized NSPs
To verify that NVRAM and sec-NVRAM contain identical startup configurations, compare the output
of the following command entries:
The displayed output should be identical.
Erasing Startup Configurations on Redundant NSPs
To erase the startup configuration on redundant NSPs, complete the following steps beginning in EXEC
mode:
Note If you only erase the startup configuration on the primary NSP, and the primary and secondary NSPs
reverse roles, the new primary NSP will use the old startup configuration.
Verifying Erased Startup Configurations
To verify that you erased the startup configuration on redundant NSPs, use the dir nvram: and
dirsec-nvram: EXEC commands and check that the startup-config size is zero:
NSP# dir nvram:
Directory of nvram:/
1 -rw- 0 <no date> startup-config
129016 bytes total (129016 bytes free)
You can also use the show startup EXEC command and make sure that a valid configuration file does
not appear:
NSP# show startup
%% Non-volatile configuration memory is being written, Try again later
PCMCIA Disk Mirroring
Introduced in Cisco IOS Release 12.1(5)DB, the PCMCIA disk mirroring enables automatic data
synchronization between the PCMCIA disks of two redundant NSPs. Disk synchronization is the act of
copying data from one disk to another.
Switch# cd nvram:
Switch# dir
Switch# more startup-config
Switch# cd sec-nvram:
Switch# dir
Switch# more startup-config
Command Purpose
Step1
Switch# erase nvram:
Erases the primary NSP’s startup configuration.
Step2
Switch# erase sec-nvram:
Erases the secondary NSP’s startup configuration.