HP 6125XLG R2306-HP 6125XLG Blade Switch Layer 3 - IP Routing Configuration Gu - Page 233

Step 1. Enter system view. 2. Enable trap for BGP. Command system-view snmp-agent trap enable bgp Remarks N/A By default, trap for BGP is enabled. For more information about this command, see Network Management and Monitoring Configuration Guide. Enabling logging of session state changes Perform this task to enable BGP to log BGP session establishment and disconnection events. To view the log information, use the display bgp peer ipv4 log-info command. To enable the logging of session state changes: Step Command 1. Enter system view. system-view 2. Enter BGP view. bgp as-number 3. Enable the logging of session state changes globally. log-peer-change Remarks N/A N/A By default, logging of session state changes is enabled globally. Configuring BFD for BGP IMPORTANT: If you have enabled GR, use BFD with caution because BFD might detect a failure before the system performs GR, which will result in GR failure. If you have enabled both BFD and GR for BGP, do not disable BFD during a GR process to avoid GR failure. BGP maintains neighbor relationships based on the keepalive timer and hold timer in seconds. It requires that the hold time must be at least three times the keepalive interval. This mechanism makes link failure detection slow. Once a failure occurs on a high-speed link, a large quantity of packets will be dropped before routing convergence completes. BFD for BGP can solve this problem by fast detecting link failures to reduce convergence time. For more information about BFD, see High Availability Configuration Guide. Before you can enable BFD for the BGP peer, establish a BGP session between the local router and the peer. To enable BFD for a BGP peer (IPv4): Step 1. Enter system view. Command system-view Remarks N/A 222