What is BDI and BVI? why we used BDI and BVI

What is BDI and BVI?? why we used BDI and BVI.

BDI (Bridge Domain Interface) is a feature primarily designed for Cisco’s IOS-XE system. It enables the creation of multiple virtual networks over a single physical network. Think of it as a switchport trunk for routers. BDI acts as a Layer 2 interface that facilitates the flow of traffic between different Layer 2 networks. However, it does not support features like traffic shaping, queuing, or BFD (Bidirectional Forwarding Detection).

On the other hand, BVI (Bridge Virtual Interface) allows for Layer 3 routing within a bridge group. To establish Layer 3 routing, the BVI number needs to match the group number. BVI essentially enables the routing functionality for a bridge group, allowing it to forward traffic at the Layer 3 level

BDI Configuration Example:
interface BDI10
description Virtual network 10
encapsulation dot1Q 10
bridge domain 10
interface GigabitEthernet0/1
description Physical interface connected to BDI10
no ip address
negotiation auto
service instance 10 ethernet
encapsulation default
bridge-domain 10

BVI Configuration Example:
interface BVI10
description Bridge Virtual Interface for Bridge Group 10
ip address
bridge 10 protocol ieee
bridge 10 route ip
interface GigabitEthernet0/1
description Physical interface connected to BVI10
no ip address
bridge-group 10

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