( 元 reachability information from ARP/ND caches, MAC mobility and The protocol also covers other aspects of virtual Ethernet segments On our scenario where hypervisors act as VTEPs. Implementations of MC-LAG allowing several VTEPs to act as anĮndpoint for a single link aggregation group. for each VNI, the local MAC addresses (type 2 routes).the VNIs they have interest in (type 3 routes), and.There are two kinds of reachability information a VTEP sends through EVPN is a special family toĪdvertise MAC addresses and the remote equipments they are attached This extension canĬarry reachability information ( NLRI) for multiple protocols (IPv4, It is alsoĮxtensible and one of its extension is MP- BGP. Without relying on multicast nor source-address learning.īGP EVPN relies on BGP ( RFC 4271) and its MP- BGP extensions Is a standard control protocol to efficiently solves these two aspects Introduction to BGP EVPN #īGP EVPN ( RFC 7432 and RFC 8365 for its application to VXLAN) Second point, this is source-address learning. Multicast) as they have to be forwarded to all VTEPs.Ī typical solution for the first point is using multicast. avoidance of BUM frames (broadcast, unknown unicast and.

discovery of other endpoints ( VTEPs) sharing the same VXLAN segments, and.In a large VXLAN deployment, two aspects need attention:

Getting VXLAN information from the kernel.

Each entry has a corresponding aging timer attached to it, so that the forwarding entries get refreshed after some time, making the MAC learning table up-to-date. This command will show a list of all learned MAC addresses along with their associated port number. You can check the current forwarding table or MAC learning table of a Linux bridge using the following command. Building a FDB is often called ' MAC learning' or just ' learning' process. That way, later when a bridge needs to forward a packet destined to address X, it knows where to forward the packet from FDB lookup. When a bridge receives a packet (with source MAC address X) at port N, it records in FDB that MAC address X is reachable via port N. Similar to hardware bridge, Linux bridge maintains a layer-2 forwarding table (also known as MAC learning table, forwarding database, or just FDB), which keeps track of what MAC addresses are associated with which ports.

How can I view the MAC learning table (or forwarding table) of a Linux bridge?Ī Linux bridge is software implementation of a network bridge, which is part of Linux kernel. Question: I would like to check MAC address learning status of a Linux bridge that I created with brctl tool.

Cumulus linux show mac address table