HP 6125XLG R2306-HP 6125XLG Blade Switch Layer 3 - IP Routing Configuration Gu - Page 196
Limiting routes received from a peer or peer group
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Step 1. Enter system view. 2. Enter BGP view or BGP-VPN instance view. 3. Enter BGP IPv4 unicast instance view or BGP-VPN IPv4 unicast instance view. 4. Advertise a default route to a peer or peer group. 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 ipv4-family [ unicast ] peer { group-name | ip-address } default-route-advertise [ route-policy route-policy-name ] Remarks N/A N/A N/A By default, no default route is advertised. To advertise a default route to a peer or peer group (IPv6): Step 1. Enter system view. 2. Enter BGP view. 3. Enter BGP IPv6 unicast instance view. 4. Advertise a default route to a peer or peer group. Command system-view bgp as-number ipv6-family [ unicast ] peer { group-name | ipv6-address } default-route-advertise [ route-policy route-policy-name ] Remarks N/A N/A N/A By default, no default route is advertised. Limiting routes received from a peer or peer group This feature can prevent attacks that send a large number of BGP routes to the router. If the number of routes received from a peer or peer group exceeds the upper limit, the router takes one of the following actions based on your configuration: • Tear down the BGP session to the peer or peer group. • Display an alarm message. • Tear down the BGP session to the peer or peer group and, after a specified period of time, reestablishes a BGP session to the peer or peer group. You can specify a percentage threshold for the router to display an alarm message. When the ratio of the number of received routes to the maximum number reaches the percentage value, the router displays an alarm message. To limit routes that a router can receive from a peer or peer group (IPv4): Step 1. Enter system view. Command system-view Remarks N/A 185
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