Brocade Communications Systems FastIron X Series User Manual

devices in the confederation. Thus, devices in other autonomous systems see trac as coming from AS 10 and are unaware that the
devices in AS 10 are subdivided into sub-autonomous systems within a confederation.
Conguring a BGP4 confederation
To congure a BGP4 conguration, perform these conguration tasks on each BGP4 device within the confederation:
• Congure the local AS number. The local AS number indicates membership in a sub-AS. All BGP4 devices with the same local
AS number are members of the same sub-AS. BGP4 devices use the local AS number when communicating with other BGP4
devices in the confederation.
• Congure the confederation ID. The confederation ID is the AS number by which BGP4 devices outside the confederation
recognize the confederation. A BGP4 device outside the confederation is not aware of, and does not care that BGP4 devices
are in multiple sub-autonomous systems. A BGP4 device uses the confederation ID to communicate with devices outside the
confederation. The confederation ID must dier from the sub-AS numbers.
• Congure the list of the sub-AS numbers that are members of the confederation. All devices within the same sub-AS use IBGP
to exchange device information. Devices in dierent sub-autonomous systems within the confederation use EBGP to exchange
device information.
To congure four devices to be members of confederation 10 (consisting of sub-autonomous systems 64512 and 64513), enter
commands such as the following.
Commands for device A
deviceA(config)# router bgp
deviceA(config-bgp-router)# local-as 64512
deviceA(config-bgp-router)# confederation identifier 10
deviceA(config-bgp-router)# confederation peers 64512 64513
deviceA(config-bgp-router)# write memory
Syntax: [no] local-as num
The num parameter with the local-as command indicates the AS number for the BGP4 devices within the sub-AS. You can specify a
number in the range 1 - 4294967295. I Brocade recommends that you use a number within the range of well-known private
autonomous systems, 64512 through 65535.
Syntax: [no] confederation
identier num
The num parameter with the confederation identier command indicates the confederation number. The confederation ID is the AS
number by which BGP4 devices outside the confederation recognize the confederation. A BGP4 device outside the confederation is not
aware of, and does not care that your BGP4 devices are in multiple sub-autonomous systems. BGP4 devices use the confederation ID
when communicating with devices outside the confederation. The confederation ID must be dierent from the sub-AS numbers. For the
num parameter, you can specify a number in the range 1 - 4294967295.
Syntax: [no] confederation peers num [num ...]
The num parameter with the confederation peers command indicates the sub-AS numbers for the sub-autonomous systems in the
confederation. You can list all sub-autonomous systems in the confederation. You must specify all the sub-autonomous systems with
which this device has peer sessions in the confederation. All the devices within the same sub-AS use IBGP to exchange device
information. Devices in dierent sub-autonomous systems within the confederation use EBGP to exchange device information. The num
is a number in the range 1 - 4294967295.
Commands for device B
deviceB(config)# router bgp
deviceB(config-bgp-router)# local-as 64512
Optional BGP4 conguration tasks
FastIron Ethernet Switch Layer 3 Routing
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Brocade Communications Systems FastIron X Series Specifications

General

Brand	Brocade Communications Systems
Model	FastIron X Series
Category	Switch
Language	English