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Etherchannel PAgP y LACP

EtherChannels can be negotiated between two switches, there are two protocols to carry out this negotiation: PAgP and LACP. PAgP (Port Aggregation Protocol) is a Cisco proprietary solution and LACP (Link Aggregation Control Protocol) is based on standards for operation with different manufacturers. All etherchannel member interfaces must be configured with the same protocol on …

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UDLD – UniDirectional Link Detection

UDLD is a Cisco proprietary Layer 2 protocol that monitors the state of a port to validate bidirectional communication. Recall that each port in a swtich is bidirectional, with a transmitter (Tx) and a receiver (Rx) to exchange bits. The switch sends a special frame to the destination mac address 01-00-0C-CC-CC-CC-CC that identifies the device …

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