Reference Guide

Border Gateway Protocol IPv4 (BGPv4) | 315

Border Gateway Protocol IPv4 (BGPv4)

Overview

BGPv4 is supported as shown in the following table.

For detailed information on configuring BGP, refer to the BGP chapter in the FTOS Configuration

Guide.

This chapter contains the following sections:

• BGPv4 Commands

• MBGP Commands

• BGP Extended Communities (RFC 4360)

BGPv4 Commands

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 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.

FTOS version Platform support

8.1.1.0 E-Series ExaScale

7.8.1.0 S-Series

7.7.1.0. C-Series

pre-7.7.1.0 E-Series TeraScale

Note: FTOS Version 7.7.1 supports 2-Byte (16-bit) and 4-Byte (32-bit) format for Autonomous System Numbers

(ASNs), where the 2-Byte format is 1-65535, the 4-Byte format is 1-4294967295.

Note: FTOS Version 8.3.1.0 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 FTOS Configuration Guide.