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What is the feature used in a switch to prevent sending of BPDUs to unwanted receivers in a network?
The BPDU Guard feature is designed to keep the active topology predictable and to enhance switch network reliability by enforcing the STP domain borders. In a service-provider network environment, the BPUD Guard feature can be used to prevent an access port from participating in the spanning tree.
Should I turn off spanning-tree?
STP should never be disbaled unless you have an extremely good reason to do so. If you’re wanting to reduce the amount of time it takes for an access port to come up, you should configure it as an edge port instead of disabling STP.
What happens when you disable loop guard in BPDU?
When you disable loop guard, it is disabled for the specified ports. Disabling loop guard moves all loop-inconsistent ports to the listening state. If you enable loop guard on a channel and the first link becomes unidirectional, loop guard blocks the entire channel until the affected port is removed from the channel.
When to enable BPDU guard on spanning tree switch?
Note When you enable BPDU guard on the switch, spanning tree applies BPDU guard to all PortFast-configured interfaces. BPDU filtering allows you to avoid transmitting BPDUs on PortFast-enabled ports that are connected to an end system.
Can a portfast configured interface receive a BPDU?
In a valid configuration, PortFast-configured interfaces do not receive BPDUs. If a PortFast-configured interface receives a BPDU, an invalid configuration exists. BPDU guard provides a secure response to invalid configurations because the administrator must manually put the interface back in service.
When does BPDU switch transmit dummy multicast frames?
As soon as the switch transitions the alternate port to the forwarding state, the switch begins transmitting dummy multicast frames on that port, one for each entry in the local Enhanced Address Recognition Logic (EARL) table (except those entries that are associated with the failed root port).