Configuring all OSPF interfaces as passive
OSPF sends LSAs to all other routers in the same AS. To limit the flooding of LSAs throughout the AS, you can configure OSPF to be passive.
Prerequisites
You must be in the router configuration context, as indicated by the
switch(config-router)#
prompt.
Procedure
Configure all OSPF interfaces as passive using the following command. For command details, see
passive-interface default.
passive-interface default
switch(config-router)# passive-interface default