MS Warm Spare issue

[Luffy]

Hi,

I built meraki device as below topology.

It is a warm spare setting not stacking.

After that I saw many looping issue, so all of L2 MS were down.

Should I set port-channel on the each L2 MS ?

Thank you,

[PhilipDAth]

If they are not stacked then you can not port-channel across the switches.

[Luffy]

Thank you,

Not stacked, just warm spare setting only.

I don't know why looping occurs although warm spare setting was working well.

[PhilipDAth]

Because you have dual connected everything so there are several loops. Spanning tree will block the redundant links, so it should still work fine.

[Luffy]

In this case, not only redundant links but also primary links also are blocked by spanning tree.

All of L2 Switch are not working well.

[PhilipDAth]

Have you configured the spanning tree priority to make your two main switches the root and backup root?

[Luffy]

yes, main root priority is 4096 and backup root priority is 8192.

[MilesMeraki]

What version of MS firmware version are you running?

I'd attempt to re-build this first, getting both MS HA switches online and checking into dashboard correctly.

Firstly, factory reset. Power up the 1st switch, make sure you set it to be root bridge. Power up the Second switch, getting it to be the backup. Then attempt to plug in primary up-links. Then plug in secondary up-links.

[Luffy]

Thank you for your answer.

I'll check firmware version.

You mean physical connections are not a problem, right ?

[Zilla]

Check to make sure you are not running BPDU guard on the links between your switches.