D-Link DGS-3620-52T CLI Guide - Page 184

xStack® DGS-3620 Series Layer 3 Managed Stackable Gigabit Switch CLI Reference Guide 12-32 config bgp confederation identifier Description This command is used to configure the BGP confederation. A confederation, which is represented by an AS, is a group of the sub AS. A confederation can be used to reduce the internal BGP (iBGP) mesh by dividing a large single AS into multihop sub AS. External peers interact with the confederation as if it is a single AS. Each sub AS is fully meshed within itself and it has connections to other sub AS within the confederation. The next hop, Multi Exit Discriminator (MED), and local preference information is preserved throughout the confederation, allowing you to retain a single Interior Gateway Protocol (IGP) for all the autonomous systems. Format config bgp confederation identifier Parameters - Autonomous System numbers which we use to specify a BGP confederation. If it is set to zero, the BGP confederation number is deleted. By default, this setting is zero. This value must be between 0 and 65535. Restrictions Only Administrator, Operator and Power-User level users can issue this command. (EI Mode Only Command) Example To create a confederation, AS number is 20: DGS-3620-28SC:admin# config bgp confederation identifier 20 Command: config bgp confederation identifier 20 Success. DGS-3620-28SC:admin# 12-33 config bgp confederation peers Description The command is used to configure multiple adjacent Autonomous Systems in a confederation. The Autonomous Systems specified in this command are visible internally to the confederation. Each Autonomous System is fully meshed within itself or configures route reflector. Format config bgp confederation peers [add | delete] 179