Maintenance switch

Purpose

The maintenance switch provides you with an easy way to drain every BGP session on your router by rejecting all routes in- and outbound. This can apply to the entire router or groups of sessions, like e. g. every peering at an IXP. This way you can ensure traffic reroutes gracefully before shutting off an interface or the router during a maintenance.

Configuration

Juniper JunOS

# Normal configuration
set policy-options policy-statement MAINTENANCE-MODE term ACTIVATE-MAINTENANCE then reject
deactivate policy-options policy-statement MAINTENANCE-MODE term ACTIVATE-MAINTENANCE
set policy-options policy-statement MAINTENANCE-MODE then next policy

set protocols bgp group MY_NEIGHBOR_GROUP 198.51.100.1 import MAINTENANCE-MODE
set protocols bgp group MY_NEIGHBOR_GROUP 198.51.100.1 import <regular filtering policies go after the switch>
set protocols bgp group MY_NEIGHBOR_GROUP 198.51.100.1 export MAINTENANCE-MODE
set protocols bgp group MY_NEIGHBOR_GROUP 198.51.100.1 export <Regular filtering policies go after the switch>

# Add this to activate the switch
activate policy-options policy-statement MAINTENANCE-MODE term ACTIVATE-MAINTENANCE