HP 6125XLG R2306-HP 6125XLG Blade Switch Layer 3 - IP Routing Configuration Gu - Page 322

Enabling the logging of neighbor state changes Step 1. Enter system view. 2. Enter OSPFv3 view. 3. Enable the logging of neighbor state changes. Command system-view ospfv3 [ process-id | vpn-instance vpn-instance-name ] * Remarks N/A N/A log-peer-change By default, this feature is enabled. Configuring OSPFv3 GR GR ensures forwarding continuity when a routing protocol restarts or an active/standby switchover occurs. Two routers are required to complete a GR process. The following are router roles in a GR process. • GR Restarter-Graceful restarting router. It must be GR capable. • GR Helper-The neighbor of the GR Restarter. It helps the GR Restarter to complete the GR process. To prevent service interruption after a master/backup switchover, a GR Restarter running OSPFv3 must complete the following tasks: • Keep the GR Restarter forwarding entries stable during reboot. • Establish all adjacencies and obtain complete topology information after reboot. After the active/standby switchover, the GR Restarter sends a Grace-LSA to tell its neighbors that it performs a GR. Upon receiving the Grace-LSA, the neighbors with the GR Helper capability enter the helper mode (and are called "GR Helpers"). Then, the GR Restarter retrieves its adjacencies and LSDB with the help of the GR Helpers. Configuring GR Restarter You can configure the GR Restarter capability on a GR Restarter. To configure GR Restarter: Step 1. Enter system view. 2. Enter OSPFv3 view. 3. Enable the GR capability. 4. (Optional.) Configure the GR interval. Command Remarks system-view N/A ospfv3 [ process-id | vpn-instance vpn-instance-name ] * N/A graceful-restart enable By default, OSPFv3 GR Restarter capability is disabled. graceful-restart interval interval-value By default, the GR interval is 120 seconds. 311