ABOUT NETWORKING

Etherchannel is the technology that binds multiple physical links in to the single logical link in the switch which fools the spanning tree to be visible as a single port id instead of multiple physical ports id's this causes all the ports to be in the forward state to pass the traffic without creating the loops in the network. We can configure the etherchannel either through static or dynamic. Static ether channel works by manually binding the physical ports into one logical port, this is not recommended because it is not aware the state of the other end physical ports whereas LACP (Link aggregation control protocol) and PAGP (Port aggregation group protocol) are the two dynamic protocols. LACP is the IEEE standard and the PAGP is the Cisco proprietary protocol, LACP is the most commonly used protocol in the networks it works by negotiating with the other end of the ports and would form the portchannel once the set of parameters match on both ends. We can bind max 16 ports to a si...

How Virtual Port Channel Avoid Duplicate Frames There is one critical rule with vPC.  If a member port receives a frame, it is forwarded across the peer-link. When the peer switch receives it, it will not forward the frame out a vPC member port . Why does this happen? Have a look at the diagram below. Frames received on a member port, then forwarded across the peer-link, will not be forwarded out another member port There are two servers connected by vPC member ports. Server-1 sends a frame to Server-2. The traffic flows like this: 1.        The frame travels up the link from Server-1 to Peer-1 2.        Peer-1 forwards the frame down the link to Server-2 3.        Peer-1 also forwards the frame across the peer-link to Peer-2 4.        Peer-2 sees that the frame came from a vPC member port, and refuses to forward it to Ser...