ECS4660-28F_Management Guide-R03

C HAPTER 51 | IP Routing Commands
Border Gateway Protocol (BGPv4)
– 1850 –
COMMAND MODE
Router Configuration
DEFAULT SETTING
No redistribution is configured.
COMMAND USAGE
◆ Use this command to advertise routes that are learned by some other
means, such as from another routing protocol or static routing entries.
Since all internal routes are maintained by interior gateway protocols
such as RIP and OSPF, careful filtering should be used to ensure that
only routes that need to be advertised reach the Internet.
◆ A route metric must be used to resolve the problem of redistributing
external routes with incompatible metrics.
EXAMPLE
Console(config-router)#redistribute static metric 10
Console(config-router)#
timers bgp This command sets the Keep Alive time used for maintaining connectivity,
and the Hold time to wait for Keep Alive or Update messages before
declaring a neighbor down. Use the no form to restore the default settings.
SYNTAX
timers bgp keepalive-time hold-time
no timers bgp
keepalive-time – The frequency at which the local router sends
keep-alive messages to its neighbors. (Range: 0-65535 seconds)
hold-time – The maximum interval after which a neighbor is
declared dead if a keep-alive or update message has not been
received. (Range: 0-65535 seconds)
COMMAND MODE
Router Configuration
DEFAULT SETTING
Keep Alive time: 60 seconds
Hold time: 180 seconds
COMMAND USAGE
◆ Use this command to set global BGP timers used for monitoring
connectivity to neighboring routers. These timers will be applied to all
neighbors unless the neighbor timers command has been used to
explicitly configure other timer settings for a neighbor.
◆ When the minimum acceptable hold-time is configured with this
command, a remote peer session can be established only if the