Skip to main content
Sign Out

Welcome to Dell

My Account
  • Place orders quickly and easily
  • View orders and track your shipping status
  • Enjoy members-only rewards and discounts
  • Create and access a list of your products
  • Manage your Dell EMC sites, products, and product-level contacts using Company Administration.
Sign In Create an Account Dell Financial Services Premier Sign In Partner Program Sign In
Contact Us

Your Dell.com Carts

Dell Configuration Guide for the S4048–ON System 9.14.2.6

PDF

Enabling four-byte autonomous system numbers

You can enable 4-byte support for configuring autonomous system numbers (ASN).

To enable 4-byte support for the BGP process, use the following command.
NOTE When creating BGP confederations, all the routers in the Confederation must be a 4-byte or 2-byte identified routers. You cannot mix them.
Enable 4-byte support for the BGP process.
CONFIG-ROUTER-BGP mode
bgp four-octect-as-support
NOTE If you enter a 4-byte AS number, 4-byte AS support is enabled automatically. This command is optional. Use it only if you support 4-Byte AS numbers or if you support AS4 number representation.
Disable 4-Byte support and return to the default 2-Byte format by using the no bgp four-octet-as-support command. You cannot disable 4-Byte support if you currently have a 4-Byte ASN configured.

Example configuration for enabling four-byte autonomous system numbers

DellEMC# configure terminal
DellEMC(conf)# router bgp 80000
DellEMC(conf-router_bgp)# bgp four-octet-as-support
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)#exit
To view BGP configuration, use the show running-config bgp command in EXEC Privilege mode.

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 80000
BGP local RIB : Routes to be Added 0, Replaced 0, Withdrawn 0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

Rate this content

Accurate
Useful
Easy to understand
Was this article helpful?
0/3000 characters
  Please provide ratings (1-5 stars).
  Please provide ratings (1-5 stars).
  Please provide ratings (1-5 stars).
  Please select whether the article was helpful or not.
  Comments cannot contain these special characters: <>()\