set protocols bgp neighbor maximum-prefix
The set protocols bgp neighbor maximum-prefix command sets a maximum number of prefixes we can receive from a given neighbor. If this number is exceeded, the BGP session will be destroyed.
The delete protocols bgp neighbor maximum-prefix command disables the maximum number of prefixes limit.
Command Syntax
set protocols bgp [vrf <vrf-name>] neighbor <ip> ipv4-unicast maximum-prefix <max-prefix-number>
delete protocols bgp [vrf <vrf-name>] neighbor <ip> ipv4-unicast maximum-prefix <max-prefix-number>
Parameter
Parameter | Description |
vrf <vrf-name> | Optional. Specifies a VRF name. The value is a string. It’s a user-defined VRF set by the command set ip vrf <vrf-name> [description <string>]. |
neighbor <ip> | Specifies the IPv4 address of a peer. |
peer-group <peer-group> | Specifies a peer group. |
interface <interface> | Specifies an L3 interface for BGP connection. The value could be a VLAN interface name, loopback interface name, routed interface or sub-interface name. |
maximum-prefix <max-prefix-number> | Specifies the maximum number of prefixes allowed from the specified neighbor. The value is an integer from 1 to 4294967295. |
Usage Guidelines
In practice, it is generally preferable to use a prefix-list to limit what prefixes are received from the peer instead of using this knob. Tearing down the BGP session when a limit is exceeded is far more destructive than merely rejecting undesired prefixes. The prefix-list method is also much more granular and offers much smarter matching criterion than number of received prefixes, making it more suited to implementing policy.
Example
• This example sets the prefix limit to 1000 prefixes.
admin@XorPlus# set protocols bgp neighbor 2.2.2.2 ipv4-unicast maximum-prefix 1000
admin@XorPlus# commit