SMC Networks SMC8612XL3 F 1.0.1.3 manual 3-301

IP R OUTING
3-301
- Normally, only one key is used per interface to generate
authentication information for outbound packets and to
authenticate incoming packets. Neighbor routers must use the
same key identifier and key value.
- When changing to a new key, the router will send multiple copies
of all protocol messages, one with the old key and another with
the new key. Once all the neighboring routers start sending
protocol messages back to this router with the ne w key, the router
will stop using the old key. This rollover process gives the network
administrator time to update all the routers on the network
without affecting the network connectivity. Once all the network
routers have been updated with the new key, the old key should
be removed for security reasons.
Web - Click Routing Protocol, OSPF, Interface Configuration. Select the
required interface from the scroll-down box, and click Detailed Settings.