Product specifications
Upgrading the IOS on Cisco Switches
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Upgrading the IOS on Cisco Switches
This procedure differs slightly from the one documented by Cisco. Cisco Catalyst 4948-10GE switches supplied
by Avid are configured with a Configuration Register value of 0x2101, which means the switch boots from the
first IOS that appears in bootflash. Cisco instructs you to set the Configuration Register to 0x2102, which means
the switch will look for a boot string that points to the IOS from which to boot. The following procedure is based
on Avid’s current shipping product.
To update the IOS:
1. Use the
dir bootflash
: command to ensure that there is sufficient space in Flash memory to store the
PROM upgrade image. In most cases there will only be one file in bootflash, which leaves plenty of space for
the new file. If there is insufficient space, delete one or more images, and then issue the
squeeze
bootflash
: command to reclaim the space. For example:
- SwitchHostName#
delete bootflash:<filename.bin>
- SwitchHostName#
squeeze bootflash:
2. Download the <filename> program into Flash memory using the
copy tftp
command. For Example:
- SwitchHostName#
copy tftp bootflash:
- Address or name of remote host [172.20.58.78]?
- Source filename [<filename>]?
- Destination filename [<filename>]?
3. Use the
config-register
command to set the configuration register to 0x2101. For Example:
- SwitchHostName#
configure terminal
- SwitchHostName(config)#
config-register 0x2101
- SwitchHostName(config)#
exit
- SwitchHostName#
write
- Building configuration...
- Compressed configuration from 3723 to 1312 bytes [OK]
4. Archive the previous IOS image in case you need to re-apply at a later time. For example:
- SwitchHostName#
copy bootflash: tftp:
- Source filename []? <filename.bin>
- Address or name of remote host []? 172.20.98.3
- Destination filename [<filename.bin>]?
5. Delete the old IOS images, and then issue the
squeeze bootflash
: command to reclaim the space. For
example:
- SwitchHostName#
delete bootflash:<filename.bin>
- SwitchHostName#
squeeze bootflash:
6. Once the squeeze is complete (it will take a few minutes), enter the
reload
command to reset the switch and
load the software. For example:
- SwitchHostName#
reload
Use the
show version
command to verify that the new Cisco IOS release is operating on the switch.