HP 6125XLG R2306-HP 6125XLG Blade Switch Layer 3 - IP Routing Configuration Gu - Page 228
Configuring a large-scale BGP network, Configuring BGP community
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Step 2. Enter BGP view or BGP-VPN instance view. 3. Configure BGP to protect EBGP peer or peer group when the memory usage reaches level 2 threshold. Command • Enter BGP view: bgp as-number • Enter BGP-VPN instance view: a. bgp as-number b. ip vpn-instance vpn-instance-name peer { group-name | ip-address } low-memory-exempt Remarks N/A By default, BGP tears down an EBGP session to release memory resources periodically when level 2 threshold is reached. To configure BGP to protect EBGP peer or peer group when the memory usage reaches level 2 threshold (IPv6): Step 1. Enter system view. 2. Enter BGP view or BGP-VPN instance view. 3. Configure BGP to protect EBGP peer or peer group when the memory usage reaches level 2 threshold. Command system-view • Enter BGP view: bgp as-number • Enter BGP-VPN instance view: a. bgp as-number b. ip vpn-instance vpn-instance-name peer { group-name | ipv6-address } low-memory-exempt Remarks N/A N/A By default, BGP tears down an EBGP session to release memory resources periodically when level 2 threshold is reached. Configuring a large-scale BGP network In a large network, the number of BGP connections is huge and BGP configuration and maintenance are complicated. To simply BGP configuration, you can use the peer group, community, route reflector, and confederation features as needed. For more information about configuring peer groups, see "Configuring a BGP peer group." Configuring BGP community By default, a router does not advertise the COMMUNITY or extended community attribute to its peers or peer groups. When the router receives a route carrying the COMMUNITY or extended community attribute, it removes the attribute before advertising the route to other peers or peer groups. Perform this task to enable a router to advertise the COMMUNITY or extended community attribute to its peers for route filtering and control. You can also reference a routing policy to add or modify the COMMUNITY or extended community attribute for specific routes. For more information about routing policy, see "Configuring routing policies." To configure BGP community (IPv4): 217