1/30/2024 0 Comments Dynamic mac address learning![]() ![]() BGP distributes both of these to all peers. VNI’s can now be considered layer-2 VNI’s (L2VNI) or layer-3 VNI’s (元VNI). Not all platforms support IRB, so choose wisely. There is no need to hairpin traffic through an external router. This means that each switch with a VTEP can also be a router. Good news! Integrated Routing and Bridging (IRB) is supported when using BGP. If the cache expires, the flooding process begins again. The host then begins normal unicast communication with the destination host. The original VTEP receives the response and passes it on to the host. It has already cached its address from before. The local VTEP encapsulates the response and sends it to the original VTEP. This is unicast traffic, as it has a single destination. One of the hosts will respond to the ARP, while the rest will discard the request. The VTEPs forward the ARP to all ports that belong to the VNI. When the VTEPs receive the ARP, they cache the IP to MAC information for possible use later. ![]() To do this, it sends the ARP to the appropriate multicast group. The switch needs to send it to all VTEPs with this VNI, as well as to all local ports with this VNI. It will send an ARP request (BUM traffic) to discover this information. The host knows the IP address of the destination, but not its MAC. Imagine a host needs to send traffic to a remote host in the same VNI. Let’s take a moment to think about how this process works.
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