Configuring BGP
To enable BGP, the stack master must be running the IP services image.
Note
Beginning in privileged EXEC mode, follow these steps to enable BGP routing, establish a BGP routing
process, and specify a neighbor:
Command
Step 1
configure terminal
Step 2
ip routing
Step 3
router bgp autonomous-system
Step 4
network network-number [mask network-mask]
[route-map route-map-name]
Step 5
neighbor {ip-address | peer-group-name}
remote-as number
Step 6
neighbor {ip-address | peer-group-name}
remove-private-as
Step 7
no synchronization
Step 8
no auto-summary
Step 9
bgp fast-external-fallover
Step 10
bgp graceful-restart
Step 11
end
Catalyst 3750 Switch Software Configuration Guide
35-48
Chapter 35
Purpose
Enter global configuration mode.
Enable IP routing (required only if IP routing is disabled).
Enable a BGP routing process, assign it an AS number, and
enter router configuration mode. The AS number can be from
1 to 65535, with 64512 to 65535 designated as private
autonomous numbers.
Configure a network as local to this AS, and enter it in the BGP
table.
Add an entry to the BGP neighbor table specifying that the
neighbor identified by the IP address belongs to the specified
AS.
For EBGP, neighbors are usually directly connected, and the IP
address is the address of the interface at the other end of the
connection.
For IBGP, the IP address can be the address of any of the router
interfaces.
(Optional) Remove private AS numbers from the AS-path in
outbound routing updates.
(Optional) Disable synchronization between BGP and an IGP.
(Optional) Disable automatic network summarization. By
default, when a subnet is redistributed from an IGP into BGP,
only the network route is inserted into the BGP table.
(Optional) Automatically reset a BGP session when a link
between external neighbors goes down. By default, the session
is not immediately reset.
(Optional) Enable NSF awareness on switch. By default, NSF
awareness is disabled.
Return to privileged EXEC mode.
Configuring IP Unicast Routing
OL-8550-02
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