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version 15 switch software microcode and NIC card

Since upgrading a 3750x switch stack to version 15, PC's on the network do not get a DHCP lease. The only way to get them to work is disable and re-enable the NIC card.

Downgrading the IOS does not downgrade the microcode on the switches.

Is there anyway to downgrade the microcode?

Sent from Cisco Technical Support iPad App

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3 REPLIES
VIP Super Bronze

version 15 switch software microcode and NIC card

What version of IOS did you downgrade to? most newer versions of IOS upgrade the microcode also.

Hall of Fame Super Gold

version 15 switch software microcode and NIC card

A version what on which switch exactly?

Seems very strange, such a serious issue should be know by Cisco, have you contacted the TAC?

Hall of Fame Super Gold

version 15 switch software microcode and NIC card

I don't agree.  I have upgrade my 3750X to 15.0(1)SE2 and I have not seen this behaviour before.

Microcode upgrades the switch's bootstrap. 

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