10-24-2023 10:06 PM
Am i right when Cisco port accept BPDU port goes to err-disable ?
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10-24-2023 10:21 PM
Hello @Mlex1,
BPDU Guard is designed to protect the network from Layer 2 loops. If a switch port in a non-trunking mode (access mode) receives a BPDU, it is likely that a loop is being introduced into the network, and the port is shut down (err-disabled) to prevent the loop.
You can configure BPDU Guard on a per-port basis or globally for a group of ports, depending on your network requirements.
spanning-tree bpduguard enable
This command enables BPDU Guard on the specified interface. If a BPDU is received on this port, it will err-disable the port.
10-24-2023 10:21 PM
Hello @Mlex1,
BPDU Guard is designed to protect the network from Layer 2 loops. If a switch port in a non-trunking mode (access mode) receives a BPDU, it is likely that a loop is being introduced into the network, and the port is shut down (err-disabled) to prevent the loop.
You can configure BPDU Guard on a per-port basis or globally for a group of ports, depending on your network requirements.
spanning-tree bpduguard enable
This command enables BPDU Guard on the specified interface. If a BPDU is received on this port, it will err-disable the port.
10-24-2023 10:44 PM
Not unless BPDU Guard is enabled.
10-25-2023 12:53 AM - edited 10-25-2023 12:55 AM
BPDU Guard and Port Fast commands /port settings go together; Here is attach short summary from CLN; there were great posts regarding BPDU Guard and other switching enhancements few years back; not sure if we can find them (before major site conversion to mobile-friendly version)
also see https://www.cisco.com/c/en/us/support/docs/lan-switching/spanning-tree-protocol/10588-74.html
Regards, ML
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