Just ignore it if you want, the reason you can manually set the priority is that if all switches have the same one, it'll use the device with the lowest MAC address, which in some cases can be a really old switch which can cause performance issues.
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- Thread starter RoyMi6
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I prefer not to ignore, and to educate myself
Your reply gets me thinking - are MAC addresses an indicator of the age of a device? I always thought they were random
They can be especially if you use the same vendor across your fabric. In a DC environment you would ensure to set the root to the device you want, so that some random switch that's been in the DC for 15 years on 10/100 Mbps links doesn't become the root.
There will always only be one root switch, depends if you want to control it or let it sort itself out.
Looking at your install you only have two switches that support STP and they are both connected direct to UDM, you could drop them both to 4096 or have loft on 4096 and living room at 8192.
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Can I see from the topology which is the root switch in my case? (I get that it will have sorted itself out behind the scenes)
Surely if I drop them both to the same priority, the info message will remain the same, i.e. Multiple switches have the same STP Priority?
I always remember a story by Jeremy Cioara where a bunch of CCIEs got flown out to a hospital or similar because of massive outages/performance issues. They ended up tracing the issue to some really old switch being the root as the network didn't have STP priorities set up. Kinda stuck with me.Joys are large networks with old and new kit
I admit, I don't like how UniFi are baking it into their network overview. It creates confusion when in the vast majority of deployments it won't be an issue, and where it would be, the person/team deploying it really ought to know. It should be hidden or under an advanced view IMO.
There is only one root switch, just cause they connected that way doesn't matter, with the same priority as already explained they would fall-back to working it out themselves.
Set the loft switch to 4096 and living to anything else higher, doesn't matter as there is nothing else downline and no loop.
Set the loft switch to 4096 and living to anything else higher, doesn't matter as there is nothing else downline and no loop.
Soldato
Anyone use non-UniFi branded POE+ Injectors with the their kit? Want to chuck an AP upstairs but it's not wired, and the POE+ one is out of stock, and am being tight and not wanting to pay the extra for the ++.
Yes, I bought and used an unbranded Chinese Amazon job and it worked just fine.