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Author Topic: ERS Firmware and Software upgrade?  (Read 4961 times)

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Offline Gipper

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ERS Firmware and Software upgrade?
« on: August 26, 2014, 03:51:11 PM »
Received a new ERS4850GTS-PWR+ to add to an existing switch to form a stack.  I've stacked ERS before so no issue there.  However, I remember one of Michael's posts stating to make sure the switches are at the same SW level, but what about FW?   And what really got me scratching my head was that this switch is HW 12, whereas my older switch is HW 10.  So this got me looking at the downloads, which confused me even more.  Is there any way to upgrade all components of an ERS switch at the same time?  If not, what is essential to upgrade so that the switches will perform optimally in a stack?  In the past I've only upgraded the diag (which I believe is FW) and the SW.  Should I be doing more? 


Offline Telair

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Re: ERS Firmware and Software upgrade?
« Reply #1 on: August 27, 2014, 01:26:16 AM »
When upgrading code on a switch, you need to upgrade the diagnostic file (firmware) and the image file (software) only.  The hardware level of a switch is purely an indication to the manufacturer about what "revision" of device this is.  The difference in the hardware revision might be as minor as the newer revision had to use a different make of capacitor or as major as it has more flash memory in it to take newer code that lower revisions didn't have.  But basically there is nothing you can do about it.  It's rare, but some software (thinking the VSP 4000 code) requires a certain hardware revision of the switch in order to load the newer code as it has more storage space for the much bigger VSP software vs. the ERS code.

As for what to use when you upgrade your switches.  That's what the "combodiag" firmware load is for.  It will support all the models of 4000's in one firmware file.  Then just load the image file as per normal.

« Last Edit: August 27, 2014, 01:28:10 AM by Telair »

Offline Johan Witters

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Re: ERS Firmware and Software upgrade?
« Reply #2 on: August 27, 2014, 05:49:00 AM »
You should always check the release notes for the software you are willing to load: it clearly states the supported models and which file is needed for which model of switch.

Eg: for a pure ERS4500 stack you can use the 4500xxxx.diag, for mixed stacks of 4500 and 4800 you need the 4000comboxxxx.diag.
It also states if a certain minimum release is needed for a switch to operate: if you add a new model to a stack that has been running for years, it might not be possible to downgrade the new switch. In that case you need to upgrade the existing stack to a release supported by the new switch. Same for some existing models with newer HW ID.

In most cases you only need to upgrade the firmware (diag file) and runtime agent (img file). Some release will also provide new boot loader of PoE firmware. If this is the case, proper procedure is mentioned in the release notes or separate manual.

Diagnostics and agent need to be the same release if you want to stack them together, but boot and PoE versions can differ.

Hope this helps,

Kind regards,

Johan Witters

Network Engineer

Offline Gipper

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Re: ERS Firmware and Software upgrade?
« Reply #3 on: August 27, 2014, 07:26:56 AM »
Very helpful guys, thanks!! 

btw Telair, lol at your avatar, that's a blast from the past!   8)

Offline telecom116

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Re: ERS Firmware and Software upgrade?
« Reply #4 on: August 27, 2014, 09:18:05 AM »
Actually, you only need the larger Combo diag image when you have older 4500-series switches (but not all 45xx switches - read the release notes for the current software version AND the the .0 (dot zero) version of the software - the latter is usually much more detailed on upgrades.  With you having a 4800-version switch you can use the smaller version and save 1.5 meg of download time. (helpful if you're doing a remote switch across a WAN link).

So for your pure 4800 stack you can use the regular diag code.