ECS4660-28F_Management Guide-R03

C HAPTER 51 | IP Routing Commands
Border Gateway Protocol (BGPv4)
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COMMAND USAGE
◆ This command immediately resets the connection for directly adjacent
external peers if the interface goes down for any reason other than TCP
timeout.
◆ If fast external failover is disabled, the routing process waits until the
default hold timer expires to reset the session.
EXAMPLE
Console(config-router)#bgp fast-external-failover
Console(config-router)#
bgp log-neighbor-
changes
This command enables logging of neighbor resets (that is, up or down
status changes). Use the no form to disable this feature.
COMMAND MODE
Router Configuration
DEFAULT SETTING
Disabled
COMMAND USAGE
◆ This command helps detect network problems by indicating if a
neighbor connection is flapping. A high number of neighbor resets
might indicate unacceptable error rates or high packet loss in the
network.
◆ Log messages for neighbor resets are recorded as level 6 messages in
the system log file which can viewed using the show log ram command.
EXAMPLE
Console(config-router)#bgp log-neighbor-changes
Console(config-router)#
bgp network
import-check
This command checks for the existence of the next-hop and its accessibility
to an Interior Gateway Protocol. Use the no form to disable this feature.
SYNTAX
[no] bgp network import-check
COMMAND MODE
Router Configuration
DEFAULT SETTING
Disabled