What are the modes available with PAgP?

Port Aggregation Protocol (PAgP) has two Channel modes and they are “Desirable” and “Auto”. Link Aggregation Control Protocol (LACP) has two Channel modes and they are “Active” and “Passive”.

How many ports can PAgP bundle?

eight ports
For a PAgP EtherChannel, you can configure up to eight ports of the same type and speed for the same group. For a LACP EtherChannel, you can configure up to 16 Ethernet ports of the same type.

What are the modes of LACP?

There are few LACP modes: “active”, “passive” and “on”. Switch(config)#interface port-channel 5 Then you need to assign the physical ports and specify LACP mode.

Which mode does not enable PAgP EtherChannel?

the auto mode
A port in the auto mode cannot form an EtherChannel with another port that is also in the auto mode because neither port starts PAgP negotiation.

Should I use PAgP or LACP?

Both LACP and PAGP protocols are used for link aggregation. Besides, LACP can support cross-stack, while PAGP does not since it does not support participating interfaces on different physical switches. Thus if you need to form the Etherchannel on stack switch, it is better to choose LACP instead of PAGP.

What is difference between PAGP and LACP?

PAGP provides the same negotiation benefits as LACP. LACP is open standard and supported by most of vendors, while PAGP is Cisco proprietary only used between Cisco devices. Besides, LACP can support cross-stack, while PAGP does not since it does not support participating interfaces on different physical switches.

Which is mode of PAgP does Cisco use?

Port Aggregation Protocol (PAgP) is a Cisco proprietary protocol which is used for the automated, logical aggregation of Ethernet switch ports, known as an Ether Channel. There are two modes of PAgP: Auto mode: it passively negotiates PAgP aggregation.

When does a PAgP port form an EtherChannel?

PAgP is Cisco proprietary Etherchannel technology. It uses the multicast address of 01-00-0C-CC-CC-CC for communication. Switch/Router Ports can form an EtherChannel when they are in different PAgP modes as per below criteria –. A port in the desirable mode can form an EtherChannel with another port that is in the desirable or auto mode.

What is the multicast address in PAgP mode?

PAgP is Cisco proprietary Etherchannel technology. It uses the multicast address of 01-00-0C-CC-CC-CC for communication. A port in the desirable mode can form an EtherChannel with another port that is in the desirable or auto mode. A port in the auto mode can form an EtherChannel with another port in the desirable mode.

What are the modes available with PAgP?