Users Guide

Border Gateway Protocol
BGP is an external gateway protocol that transmits interdomain routing information within and between autonomous systems
(AS). BGP version 4 (BGPv4) supports classless inter-domain routing (CIDR) and the aggregation of routes and AS paths.
Basically, two routers (called neighbors or peers) exchange information including full routing tables and periodically sent
messages to update those routing tables.
NOTE: For more information about configuring the border gateway protocol (BGP), see the BGP section in the Dell
Networking OS Configuration Guide.
Topics:
• BGP IPv4 Commands
• MBGP Commands
BGP IPv4 Commands
Border Gateway Protocol (BGP) is an external gateway protocol that transmits interdomain routing information within and
between Autonomous Systems (AS). BGP supports classless interdomain routing (CIDR) and the aggregation of routes and AS
paths. Basically, two routers (called neighbors or peers) exchange information including full routing tables and periodically send
messages to update those routing tables.
NOTE:
Dell Networking OS supports 2-byte (16-bit) and 4-byte (32-bit) format for autonomous system numbers (ASNs),
where the 2-byte format is 1 to 65535 and the 4-byte format is 1 to 4294967295.
NOTE: Dell Networking OS supports dotted format as well as the traditional plain format for AS numbers. The dot format is
displayed when using the show ip bgp commands. To determine the comparable dot format for an ASN from a traditional
format, use ASN/65536. ASN%65536. For more information about using the 2– or 4-byte format, refer to the Dell
Networking OS Configuration Guide.
address-family
Enable the IPv4 multicast or the IPv6 address family.
Syntax
address-family [ipv4 {multicast | | ipv6 unicast]
Parameters
ipv4 multicast Enter the keyword ipv4 followed by the keyword multicast to enable BGPv4
multicast mode.
ipv6 unicast Enter the keyword ipv6 followed by the keyword unicast to enable BGPv6
mode.
Defaults Not configured.
Command Modes ROUTER BGP
Command
History
This guide is platform-specific. For command information about other platforms, see the relevant Dell
Networking OS Command Line Reference Guide.
Version Description
9.8(0.0P5) Introduced on the S4048-ON.
9.8(0.0P2) Introduced on the S3048-ON.
8
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