Disabling Bgp4; Bgp4 Parameters - Brocade Communications Systems FastIron SX 800 Configuration Manual

4. Save the BGP4 configuration information to the system configuration file.
For example, enter commands such as the following.
device> enable
device# configure terminal
device(config)# router bgp
BGP4: Please configure 'local-as' parameter in order to enable BGP4.
device(config-bgp)# local-as 10
device(config-bgp-router)#neighbor 10.157.23.99 remote-as 100
device(config-bgp)# write memory
Syntax: router bgp
The router bgp command enables the BGP4 protocol.
NOTE
By default, the Brocade device ID is the IP address configured on the lowest numbered loopback interface. If the
device does not have a loopback interface, the default device ID is the lowest numbered IP interface address
configured on the device. If you change the device ID, all current BGP4 sessions, OSPF adjacencies, and OSPFv3
adjacencies are cleared.
NOTE
When BGP4 is enabled on a Brocade device, you do not need to reset the system. The protocol is activated as soon
as you enable it. The device begins a BGP4 session with a BGP4 neighbor when you add the neighbor.

Disabling BGP4

If you disable BGP4, the device removes all the running configuration information for the disabled protocol from the running
configuration. To restore the BGP4 configuration, you must reload the software to load the BGP4 configuration from the startup
configuration. When you save the startup configuration file after disabling the protocol, all of the BGP4 configuration information for the
disabled protocol is removed from the startup configuration file.
The CLI displays a warning message such as the following.
device(config-bgp-router)# no router bgp
router bgp mode now disabled and runtime configuration is erased. All bgp config data will be lost when
writing to flash!
The Web Management Interface does not display a warning message.
If you are testing a BGP4 configuration and need to disable and re-enable the protocol, you should make a backup copy of the startup
configuration file containing the BGP4 configuration information. If you remove the configuration information by saving the configuration
after disabling the protocol, you can restore the BGP4 configuration by copying the backup copy of the startup configuration file onto the
flash memory.
NOTE
To disable BGP4 without losing the BGP4 configuration information, remove the local AS (for example, by entering the no
local-as command). When you remove the local AS, BGP4 retains the other configuration information but will not become
operational until you reset the local AS.

BGP4 parameters

You can modify or set the following BGP4 parameters:
• Optional - Define the router ID. (The same router ID also is used by OSPF.)
FastIron Ethernet Switch Layer 3 Routing
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BGP4 parameters

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