HP 6125G HP 6125G & 6125G/XG Blade Switches Layer 3 - IP Routing Confi - Page 288
Command, Remarks, domain-id
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Step Command Remarks 2. Enter BGP view. bgp as-number N/A 3. Enter BGP-VPN instance view. ipv4-family vpn-instance vpn-instance-name N/A 4. Configure an EBGP peer. peer { group-name | ip-address } as-number as-number N/A 5. Allow the local AS number to appear in the AS_PATH attribute of a received route, peer { group-name | ip-address } and set the maximum number allow-as-loop [ number ] of times that such case is allowed to appear. Optional. 6. Redistribute remote site routes advertised by the PE. import-route protocol [ process-id | all-processes ] [ med med-value | route-policy route-policy-name ] * By default, no route redistribution is configured. 7. Configure a filtering policy to filter the routes to be advertised. filter-policy { acl-number | ip-prefix ip-prefix-name } export [ direct | ospf process-id | rip process-id | static ] Optional. By default, BGP does not filter the routes to be advertised. 8. Configure a filtering policy to filter-policy { acl-number | filter the received routes. ip-prefix ip-prefix-name } import Optional. By default, BGP does not filter the received routes. BGP checks routing loops by examining AS numbers. When EBGP is used, the MCE advertises routing information carrying the local AS number to the site and then receives routing updates from the site. The routing updates carry the AS number of the MCE, so the MCE discards them to avoid routing loops. To enable the MCE to receive such routes, configure the MCE to allow routing loops. Routes redistributed from OSPF to BGP on the MCE have their OSPF attributes removed. To enable BGP to distinguish routes redistributed from different OSPF domains, you must enable the redistributed routes to carry the OSPF domain ID by configuring the domain-id command in OSPF view. The domain ID is added to BGP VPN routes as an extended community attribute. BGP runs in a BGP VPN instance in the same way as it runs in a normal network. For more information about BGP, see Layer 3-IP Routing Configuration Guide. 2. Configure a VPN site: Step 1. Enter system view. 2. Enter BGP view. 3. Configure the MCE as the EBGP peer. 4. Redistribute the IGP routes of the VPN. Command Remarks system-view N/A bgp as-number N/A peer { group-name | ip-address } as-number as-number N/A import-route protocol [ process-id ] [ med med-value | route-policy route-policy-name ] * Optional. A VPN site must advertise the VPN network addresses it can reach to the connected MCE. 278
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