HP 6125XLG R2306-HP 6125XLG Blade Switch Layer 3 - IP Routing Configuration Gu - Page 183
Configuring basic BGP, Enabling BGP
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Tasks at a glance (Optional.) Enabling logging of session state changes (Optional.) Configuring BFD for BGP Remarks N/A N/A Configuring basic BGP This section describes the basic settings required for a BGP network to run. Enabling BGP A router ID is the unique identifier of a BGP router in an AS. • To ensure the uniqueness of a router ID and enhance availability, specify in BGP view the IP address of a local loopback interface as the router ID. • If no router ID is specified in BGP view, the global router ID is used. • To modify a router ID, use the router-id command in BGP view, rather than the router id command in system view. • If you specify a router ID in BGP view and then remove the interface that owns the router ID, the router does not select a new router ID. To select a new router ID, use the undo router-id command in BGP view. To enable BGP: Step 1. Enter system view. Command system-view 2. Configure a global router ID. router id router-id 3. Enable BGP and enter BGP view or BGP-VPN instance view. • Enable BGP and enter BGP view: bgp as-number • Enable BGP and enter BGP-VPN instance view: a. bgp as-number b. ip vpn-instance vpn-instance-name 4. Specify a router ID. router-id router-id Remarks N/A By default, no global router ID is configured, and BGP uses the highest loopback interface IP address-if any-as the router ID. If no loopback interface IP address is available, BGP uses the highest physical interface IP address as the route ID regardless of the interface status. By default, BGP is not enabled. A router can reside in only one AS, so the router can run only one BGP process. To enter BGP-VPN instance view, the specified VPN instance must already exist and have the route distinguisher (RD) configured. For more information about VPN, see MCE Configuration Guide. By default, the global router ID is used. 172
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