topic ERS4950GTS-PWR+ - Base unit replacement in ExtremeSwitching (ERS)

ERS4950GTS-PWR+ - Base unit replacement

sangparekh — Fri, 11 Jun 2021 18:06:26 GMT

I wanted to get some guidance on replacing a base unit in a stack please.

I have read through: https://extremeportal.force.com/ExtrArticleDetail?an=000086890 but am a little unsure.

Can I set a working switch within the stack to the base (flick switch and reboot), removing the base switch on the faulty unit as well.

Then install the new replacement unit, reboot.

Set new unit to base, and change other unit back to stack member (flick base switch) and reboot.

I have already set the new replacement unit to the same firmware and software version as the existing stack, and backed up the binary and ascii config.

Thanks.

Re: ERS4950GTS-PWR+ - Base unit replacement

Dilraj_Singh_Kh — Fri, 11 Jun 2021 23:11:59 GMT

Hi @sangparekh,

From the above scenario, I am thinking you are trying to replace the base unit of the stack. Am I correct?

DILRAJ

Re: ERS4950GTS-PWR+ - Base unit replacement

sangparekh — Fri, 11 Jun 2021 23:42:08 GMT

Correct, i need to replace a base unit.

Re: ERS4950GTS-PWR+ - Base unit replacement

Dilraj_Singh_Kh — Sat, 12 Jun 2021 09:19:35 GMT

The process that you mentioned above will work but its a little lengthy. You can just shutdown the complete stack by pulling the power cables » swap the replacement unit(with base switch on) » power the units up.

DILRAJ

Re: ERS4950GTS-PWR+ - Base unit replacement

sangparekh — Sun, 13 Jun 2021 00:55:12 GMT

With the base being replaced, will the config be lost?

Re: ERS4950GTS-PWR+ - Base unit replacement

Dilraj_Singh_Kh — Sun, 13 Jun 2021 07:12:55 GMT

Check this screenshot from the doc:

Re: ERS4950GTS-PWR+ - Base unit replacement

sangparekh — Mon, 16 Aug 2021 20:07:20 GMT

The procedure we used to complete this was:

Save config
Back up config (binary) to USB
- copy config usb filename mybackup
Pull power cables on all switches in the stack
Remove the faulty unit, install new unit with switch in Base position
Power on all switch in the stack
Restore binary config from USB
- copy usb config filename mybackup
Verify config and confirm network connectivity.