BGP-EVPN Flashcards
What is BGP?
Border gateway protocol
What is EVPN?
Ethernet VPN (EVPN) is a standards-based BGP control plane to advertise MAC addresses, MAC and IP bindings and IP Prefixes.
What are the three main functions of EVPN?
1) Advertise MAC addresses
2) MAC and IP bindings
3) IP prefixes
What is the main reason to use EVPN?
Controls/minimizes mac/ip address flooding which scales best in a network with multiple leaf routers.
In BGP, what is an RD (route distinguisher)?
It identifies routes belong to a VRF.
In BGP, what is a RT (route target)?
It defines which prefixes are imported and exported between bgp peers.
What is VXLAN?
It is a layer 2 in a layer 3 overlay tunnel. It’s an ethernet/IP and UDP tunnel using udp port 4789.
What are two ways VXLAN utilizes mac/ip learning?
1) flood and learn
2) bgp evpn
In BGP, what is an address family?
Allows multi-protcol (MP-BGP) behavior to be defined over a single BGP peering. It carries this information to its’ peers.
What are examples of address families?
1) IPv4 unicast and multicast
2) IPv6 unicast and multicast
3) VPNv4
4) CLNP (connection-less network protocol)
What information is carried in the EVPN address family?
1) Host MAC
2) Host IP
3) Network
4) VRF
5) VTEP
What is the purpose of the underlay network?
It provides reachability information to reach the VTEP (routing).
What is the purpose of the overlay network?
It distributes end host information (mac/ip) - which vtep is the end host behind.
What is the advantage of using EVPN BGP over data plane/control plane learning?
It supports integrated routing and bridging.
True or false: VNIs can be used as layer 3 and layer 2.
True