Preventing Automatic Reestablishment of BGP Peering Sessions After NSR Switchovers

It is useful to prevent a BGP peering session from automatically being reestablished after a nonstop active routing (NSR) switchover when you have applied routing policies configured in the dynamic database. When NSR is enabled, the dynamic database is not synchronized with the backup Routing Engine. Therefore, when a switchover occurs, import and export policies configured in the dynamic database might no longer be available. For more information about configuring dynamic routing policies, see the Junos Policy Framework Configuration Guide.

You can configure the routing device not to reestablish a BGP peering session after an NSR switchover either for a specified period or until you manually reestablish the session. Include the idle-after-switch-over statement at the [edit protocols bgp] hierarchy level:

For a list of hierarchy levels at which you can configure this statement, see the configuration statement summary for this statement.

For seconds, specify a value from 1 through 4294967295. The BGP peering session is not reestablished until after the specified period. If you specify the forever option, the BGP peering session is not reestablished until you issue the clear bgp neighbor command.