neighbor graceful-shutdown
Syntax
neighbor {<IPV4-ADDR>|<IPV6-ADDR>|<PEER-GROUP-NAME>} graceful-shutdown local-preference <LOCAL-PREFERENCE>
neighbor {<IPV4-ADDR>|<IPV6-ADDR>|<PEER-GROUP-NAME>} graceful-shutdown <CONFIG-DELAY>
neighbor {<IPV4-ADDR>|<IPV6-ADDR>|<PEER-GROUP-NAME>} graceful-shutdown <CONFIG-DELAY> local-preference <LOCAL-PREFERENCE>
neighbor {<IPV4-ADDR>|<IPV6-ADDR>|<PEER-GROUP-NAME>} graceful-shutdown
no neighbor {<IPV4-ADDR>|<IPV6-ADDR>|<PEER-GROUP-NAME>} graceful-shutdown [local-preference <LOCAL-PREFERENCE>|<CONFIG-DELAY>|<CONFIG-DELAY> local-preference <LOCAL-PREFERENCE>]
Description
This command configures the wait time in seconds before the BGP neighbor session is shut down. It can also configure the local-preference value to be advertised before graceful shutdown.
The
no
form of this command resets the wait time to the default value of 180 seconds and the local-preference value to the default of 0.
Command context
config-router
Parameters
<IPV4-ADDR>|<IPV6-ADDR>
Specifies an IPv4 address or IPv6 address.
<PEER-GROUP-NAME>
Specifies a peer group.
local-preference
Specifies the local-preference value to be advertised before the graceful shutdown.
<CONFIG-DELAY>
Specifies the time to wait before shutting down the neighbor. Default: 180 seconds. Range: 10 seconds to 1,200 seconds.
<LOCAL-PREFERENCE>
Specifies the local-preference value for exporting the iBGP routes during a graceful shutdown. The lower the value, the lower the local preference. A value of 0 indicates that the route is the least preferred. Default: 0. Range: 0-4294967295.
Authority
Administrators
Usage
If the graceful shutdown timer has already started and the administrator configures a command that triggers a session restart, traffic loss can occur if the graceful shutdown delay is not sufficient for the BGP peers to converge to a new route.
On each Autonomous System Boundary Router (ASBR) supporting the graceful shutdown receiver procedure, an inbound BGP route policy must be applied on all EBGP sessions of the ASBR.
The policy must match the GSHUT community and lower the precedence of the route by changing the route attributes.
Examples
switch(config-router)# neighbor 1.1.1.1 graceful-shutdown 10
switch(config-router)# neighbor 1.1.1.1 graceful-shutdown local-preference 100
switch(config-router)# neighbor 1.1.1.1 graceful-shutdown 10 local-preference 100
switch(config-router)# no neighbor 1.1.1.1 graceful-shutdown 10
switch(config-router)# no neighbor 1.1.1.1 graceful-shutdown local-preference 100
switch(config-router)# no neighbor 1.1.1.1 graceful-shutdown 10 local-preference 100
switch(config-router)# no neighbor 1.1.1.1 graceful-shutdown