Install Guide

Table Of Contents
the unicast and multicast BGP database to form a routing table for unicast and multicast. You can configure BGP peers that
exchange both unicast and multicast Network Layer Reachability Information (NLRI) in which MBGP routes is redistributed into
BGP. The default is IPv4 unicast.
IPv4 and IPv6 address family
The IPv4 address family configuration in Dell EMC Networking OS is used for identifying routing sessions for protocols that
use IPv4 address. You can specify multicast within the IPv4 address family. The default of address family configuration is IPv4
unicast. You can configure the VRF instances for IPv4 address family configuration.
The IPv6 address family configuration is used for identifying routing sessions for protocols that use IPv6 address. You can
specify unicast within the IPv6 address family. You can configure the VRF instances for IPv6 address family configuration.
BGP address family model
Dell EMC Networking OS supports BGP address family identifier (AFI) with MBGP to provide scalability for multiple AFI and
subsequent address family identifier (SAFI) configurations. MBGP carries routing information for address families (IPv4 and
IPv6) of multiple network-layer protocols. Each address family has a separated BGP database, so that you can configure BGP
policy based on address family.
BGP global and address family configuration
Implementing BGP is divided into global and address family configuration.
BGP configuration command levels are grouped as high level and address family configuration. All independent commands are
grouped at the beginning of the configuration and followed by separate sub commands specific to each address family.
Following is the order of BGP configuration:
Global configuration General configuration that is applied to BGP. For example, configuring BGP timer, Adding additional
BGP paths, etc.
Address family configuration Configurations that are applied to a specific address family.
The BGP address family model consists of three address families such as IPv4 unicast, IPv4 multicast, and IPv6 unicast. The
default address family is IPv4 unicast. The neighbors configured under CONFIGURATION-ROUTER-BGP mode is considered
to be IPv4 unicast neighbor. The IPv4 routes are advertised or received irrespective of the address family configuration. To
configure a neighbor for IPv4 multicast or IPv6 unicast, you have to create an appropriate address family and activate the
neighbor in the respective address family configuration, as shown the following example configuration.
Example of BGP configuration command levels
Following is an example configuration, which explains the neighbor configuration for all the address families. Also, the
configuration shows how to create address families (IPv4 and IPv6) and activate the neighbors in the address family.
DellEMC(conf)#router bgp 10
DellEMC(conf-router_bgp)#neighbor 20.20.20.1 remote-as 200
DellEMC(conf-router_bgp)#neighbor 20.20.20.1 no shutdown
DellEMC(conf-router_bgp)#neighbor 2001::1 remote-as 200
DellEMC(conf-router_bgp)#neighbor 2001::1 no shutdown
DellEMC(conf-router_bgp)#address-family ipv4 multicast
DellEMC(conf-router_bgp_af)#neighbor 20.20.20.1 activate
DellEMC(conf-router_bgp_af)#exit
DellEMC(conf-router_bgp)#address-family ipv6 unicast
DellEMC(conf-router_bgpv6_af)#neighbor 2001::1 activate
DellEMC(conf-router_bgpv6_af)#exit
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Border Gateway Protocol (BGP)