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New Member

Cisco 3550 switches

Wanna know, what effect will i have if i downgrade the IOS image from 12.1 (13) to 12.1 (9)

Pls comment

  • Other Network Infrastructure Subjects
New Member

Re: Cisco 3550 switches

Mybe your config file should be re-writed.( and some feature

12.1 (13) support but 12.1 (13) don't support must be deleted.)

Better backup your run config and vlan.dat file first.

New Member

Re: Cisco 3550 switches

do u mean 12.1(9) on the second part?

is it backup the Running-config? Where could the vlan.dat file could be found

New Member

Re: Cisco 3550 switches

Hi vlan.dat should be in nvram.

dir nvram:

dir flash:

Is there a certain reason for the down grade? I would only recommend such a thing, only if it was necessary. Read through the Caveats, open and resolved issues for both IOS's. This will let you know if you will really be affected by the downgrade. If a lot of remarks are being made to what you could be running i.e. SNMP, VLAN, Trunk, etc. then I wouldn't do it.