New Member
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2 Messages
Did you know gateways send BPDUs?
Be careful with the gateways used for Fiber, depending on what you are using as your core network, the gateways send BPDUs so it could take your network down. I had that happen to me Thursday. I fixed it by enabling BPDU filter on my core switch.
baseballisback
ACE - Professor
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6.9K Messages
2 months ago
@JefferMC @gr8sho
This might be of interest to you...or not.
It means absolutely zero to me, but I know you two are into this level of nerdery.
(edited)
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JefferMC
ACE - Expert
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31.4K Messages
2 months ago
BPDU is a part of the Spanning Tree Protocol for Ethernet route mapping, etc.
I am a little surprised that the Gateway would be sending it, because I didn't think it used any part of STH. I also wouldn't think it would cause an issue with a properly configured Ethernet network.
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highspeed2023
New Member
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2 Messages
2 months ago
The key phrase here is “properly configured.” Lol. I am running multiple instances of spanning tree because I have Cisco and non cusco switches in my network and I have multiple paths. I think the gateway was sending BPDUs with 0 priory so lower MAC wins right? I forgot I had mst running. The issue drove me crazy until I saw spanning tree errors in the log. I then configured BPDU filters enable both ways to the gateway and that fixed it.
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