Concept Guide

NOTE: If you enter a 4-Byte AS number, 4-Byte AS support is enabled automatically.
2 Add a BGP neighbor or peer and AS number.
CONFIG-ROUTER-BGP mode
neighbor {ip-address | ipv6-address| peer-group name} remote-as as-number
• ip-address: IPv4 address of the neighbor
• ipv6-address: IPv6 address of the neighbor
• peer-group name: Name of the peer group. It can contain 16 characters.
• as-number: from 0 to 65535 (2 Byte) or from 1 to 4294967295 (4 Byte) or 0.1 to 65535.65535 (Dotted format)
NOTE: Neighbors that are dened using the neighbor remote-as command in the CONFIGURATION-ROUTER-BGP
mode exchange IPv4 unicast address prexes only.
3
Enable the BGP neighbor.
CONFIG-ROUTER-BGP mode
neighbor {ip-address | ipv6–address | peer-group-name} no shutdown
Example conguration steps to enable BGP
NOTE: When you change the conguration of a BGP neighbor, always reset it by entering the clear ip bgp * command in
EXEC Privilege mode.
To view the BGP conguration, enter show config in CONFIGURATION ROUTER BGP mode. To view the BGP status, use the show
ip bgp summary
command in EXEC Privilege mode. The example shows that the summary with a 4-byte AS number using the show
ip bgp summary command (displays a 4–byte AS number in bold).
Following is the conguration steps:
DellEMC# configure terminal
DellEMC(conf)# router bgp 65550
DellEMC(conf-router_bgp)# neighbor 20.20.20.1 remote-as 20
DellEMC(conf-router_bgp)# neighbor 20.20.20.1 no shutdown
DellEMC(conf-router_bgp)#exit
DellEMC(conf)#
The following example shows verifying the BGP conguration using the show running-config bgp command..
DellEMC#show running-config bgp
!
router bgp 65550
neighbor 20.20.20.1 remote-as 20
neighbor 20.20.20.1 no shutdown
DellEMC#
Examples of the show ip bgp Commands
The following example shows the show ip bgp summary command output (4–byte AS number displays).
R2#show ip bgp summary
BGP router identifier 1.1.1.1, local 65550
BGP local RIB : Routes to be Added 0, Replaced 0, Withdrawn 0
1 neighbor(s) using 40960 bytes of memory
Neighbor AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/Pfx
20.20.20.1 200 0 0 0 0 0 00:00:00 0
For the router’s identier, Dell EMC Networking OS uses the highest IP address of the Loopback interfaces congured. Because Loopback
interfaces are virtual, they cannot go down, thus preventing changes in the router ID. If you do not congure Loopback interfaces, the
highest IP address of any interface is used as the router ID.
Border Gateway Protocol (BGP)
201