[c-nsp] Ucode Upgrade 3750x

Harry Hambi - Atos harry.hambi at bbc.co.uk
Tue Jun 26 12:20:04 EDT 2018

Hi all,
Trying in the lab to minimise the down time when upgrading the switch IOS on a 3750x stack which has a microcode upgrade.
The commands I ‘me using are:

archive download-sw / force-ucode-reload tftp:/x.x.x.x/yyyyy.tar.

all seems to start off well ,I get the following:
A UCODE upgrade with forced reload results in a shorter reload time and downtime
for the switch or stack if the switch requires new UCODE with the new software.
If no UCODE upgrade is required after the software download, then the reload
proceeds as normal.

After a successful software download and upgrade, and if the UCODE upgrade is
necessary, the reload may be delayed by up to 20 minutes (though typically
less) in order to complete the UCODE upgrade. During this time, on the
supported switches, no new powered devices will be granted power, no new
power supplies will be recognized, and stack-power topology changes will not
be indicated on the console. All other switch functionality is unaffected.

Do you wish to continue? (yes/[no]): yes

Loading c3750e-universalk9-tar.152-4.E6.tar from (via Vlan11): !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!.!!!!!!!!!!!!!!!!!!!!!!!!!.!!!.!!!!!!!!!!!.!!.!!!!!!!.!!!!!!!!!!!!!!!!!
[OK - 31068160 bytes]

Loading c3750e-universalk9-tar.152-4.E6.tar from (via Vlan11): !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!.!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!.!!!!!!!.!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!.!!!!
examining image...
extracting info (108 bytes)
extracting c3750e-universalk9-mz.152-4.E6/info (537 bytes)
extracting info (108 bytes)

Stacking Version Number: 1.59

System Type:             0x00000002
  Ios Image File Size:   0x018B7A00
  Total Image File Size: 0x01DA1200
  Minimum Dram required: 0x08000000
  Image Suffix:          universalk9-152-4.E6
  Image Directory:       c3750e-universalk9-mz.152-4.E6
  Image Name:            c3750e-universalk9-mz.152-4.E6.bin
  Image Feature:         IP|LAYER_3|PLUS|SSH|3DES|MIN_DRAM_MEG=128
  FRU Module Version:    03.08.06.WAL

Then all stops with the following errors:

Error: The requested upgrade will cause an incompatibility since the
Error: FRU Module version numbers in the tar files are not compatible.
Error: If only one tar file was specified, the version number is not
Error: compatible with the existing image.
Error: If this is really what you want to do, you have to specify the
Error: `/no-version-check' option to override this compatibility
Error: check.

Could not find UCODE image on switch 80145688. UCODE upgrade may occur after reload.
No UCODE upgrade.

Ucode does occur when I reload but I get 15min outage. Maybe I’me looking at the wrong documents….not much online of any help that I  can see.

Any advice appreciated.


Harry Hambi BEng(Hons)  MIET  Rsgb


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