--> Virtual Port Channel is a special type of EtherChannel between two switches instead of one.
--> VPC is a part of the multi-chassis EtherChannel family similar to VSS.
--> VPC is cisco technology found in nexus platform.
--> VPC provides redundancy and dual active paths in the network.
--> As there are two or more paths to two switches, there is no single point of failure. Even one switch fails, traffic still flows.
--> VPC is layer 2 technology.
--> VPC is made of two Nexus switches which form a vpc domain. Each domain uniquely identified by using Domain ID.
--> Each Switch can only be in a single domain. one of the switches will be the primary and other will be the secondary.
--> Both switches forward traffic. The primary switch handles the majority of control plane traffic.
--> VPC switches are connected using two special links.
i) Peer-link ( It is used as backplane between two switches for sending/receiving the control plane as well as sometimes data traffic)
ii) Keep-alive link ( To know another peer is active or not by sending/receiving the heartbeats)
--> Peer-link forwards unicast/multicast/ broadcast traffic between two Nexus switches in vpc domain.
--> Peer-link is used for sharing the MAC table information between two Nexus switches in vpc domain.
--> With VPC, there are two types of ports used in nexus switches.
i) Member Port -- A member port is any port that is configured with VPC, such as ports connected to a server.
--> Any VLANs allowed on the member ports must be allowed on the peer link
ii) Orphan Port
--> An orphan port is any port that has no VPC configuration, such as ports connected to routers.
--> Any VLANs allowed on the orphan ports need not to be allowed on the peer link.
--> VPC uses duplicate frame prevention rule to avoid duplicate frames in the network.
--> Nexus switch in the VPC will drop the frame if it receives on the peer-link and needs to deliver on the member port.
--> If Nexus switch forwards any frame on peer-link and needs to deliver on the orphan port.
--> VPC Pair of switches will appear as one logical switch to other physical switches.
--> By default only the primary switch will send and process BPDU's.
--> VPC is a part of the multi-chassis EtherChannel family similar to VSS.
--> VPC is cisco technology found in nexus platform.
--> VPC provides redundancy and dual active paths in the network.
--> As there are two or more paths to two switches, there is no single point of failure. Even one switch fails, traffic still flows.
--> VPC is layer 2 technology.
--> VPC is made of two Nexus switches which form a vpc domain. Each domain uniquely identified by using Domain ID.
--> Each Switch can only be in a single domain. one of the switches will be the primary and other will be the secondary.
--> Both switches forward traffic. The primary switch handles the majority of control plane traffic.
--> VPC switches are connected using two special links.
i) Peer-link ( It is used as backplane between two switches for sending/receiving the control plane as well as sometimes data traffic)
ii) Keep-alive link ( To know another peer is active or not by sending/receiving the heartbeats)
--> Peer-link forwards unicast/multicast/ broadcast traffic between two Nexus switches in vpc domain.
--> Peer-link is used for sharing the MAC table information between two Nexus switches in vpc domain.
--> With VPC, there are two types of ports used in nexus switches.
i) Member Port -- A member port is any port that is configured with VPC, such as ports connected to a server.
--> Any VLANs allowed on the member ports must be allowed on the peer link
ii) Orphan Port
--> An orphan port is any port that has no VPC configuration, such as ports connected to routers.
--> Any VLANs allowed on the orphan ports need not to be allowed on the peer link.
--> VPC uses duplicate frame prevention rule to avoid duplicate frames in the network.
--> Nexus switch in the VPC will drop the frame if it receives on the peer-link and needs to deliver on the member port.
--> If Nexus switch forwards any frame on peer-link and needs to deliver on the orphan port.
--> VPC Pair of switches will appear as one logical switch to other physical switches.
--> By default only the primary switch will send and process BPDU's.
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