Bridge-Group Virtual Interface; Supported Features On A Bvi; Bvi Interface And Line Protocol States - Cisco NCS 5500 Series Configuration Manual

Bridge-Group Virtual Interface

Bridge-Group Virtual Interface

The BVI is a virtual interface within the router that acts like a normal routed interface. The BVI does not
support bridging itself, but acts as a gateway for the corresponding bridge-domain to a routed interface within
the router.
BVI supports only Layer 3 attributes, and has the following characteristics:
• Uses a MAC address taken from the local chassis MAC address pool, unless overridden at the BVI
• Is configured as an interface type using the interface bvi command and uses an IPv4 address that is in
• The BVI identifier is independent of the bridge-domain identifier. These identifiers do not need to
• Is associated to a bridge group using the routed interface bvi command.
• BVI interfaces support a number range of 1 to 4294967295.

Supported Features on a BVI

• These interface commands are supported on a BVI:
• The BVI supports IP helper addressing and secondary IP addressing.

BVI Interface and Line Protocol States

Like typical interface states on the router, a BVI has both an Interface and Line Protocol state.
• The BVI interface state is Up when the following occurs:
Interface and Hardware Component Configuration Guide for Cisco NCS 5500 Series Routers, IOS XR Release
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interface.
the same subnet as the hosts on the segments of the bridged domain.
correlate like they do in Cisco IOS software.
◦ arp purge-delay
◦ arp timeout
◦ bandwidth (The default is 10 Gbps and is used as the cost metric for routing protocols for the
BVI)
◦ ipv4
◦ ipv6
◦ mac-address
◦ mtu (The default is 1500 bytes)
◦ shutdown
◦ The BVI interface is created.
◦ The bridge-domain that is configured with the routed interface bvi command has at least one
available active bridge port (Attachment circuit [AC] or pseudowire [PW]).
Integrated Routing and Bridging