Chapter 50
| IP Routing Commands
Border Gateway Protocol (BGPv4)
– 1123 –
neighbor
maximum-prefix
This command sets the maximum number or route prefixes that can be received
from a neighbor. Use the no form to restore the default setting.
Syntax
neighbor {ip-address | group-name} maximum-prefix max-count [threshold
[restart interval | warning]]
no neighbor {ip-address | group-name} maximum-prefix
ip-address – IP address of a neighbor.
group-name – A BGP peer group containing a list of neighboring routers
configured with the neighbor peer-group command.
max-count – The maximum number of route prefixes that will be accepted
from a neighbor. (Range: 1-4294967295)
threshold – The percentage of the maximum number of allowed prefixes at
which the router will initiate the specified response.
restart – Restarts BGP connection after the threshold is exceeded.
interval – Time to wait after a BGP connection has been terminated, before
reestablishing the session. (Range: 1-65535 minutes)
warning – Sends a log message if the threshold is exceeded.
Command Mode
Router Configuration
Default Setting
No limit is set
Command Usage
â—† This command is used to control the maximum number of route prefixes that
can be sent by a neighbor. It provides a method to reserve resources for other
processes, or to prevent malicious attacks.
â—† If the threshold is specified, but neither the restart nor warning keywords are
used), the connection will be closed until the records are cleared with the clear
ip bgp command.
Example
In this example, the router warns when the number of route prefixes reaches 6, and
the connection will be closed when the prefixes hit 13.
Console(config-router)#neighbor 10.1.1.64 maximum-prefix 12 50
Console(config-router)#
To Next Page
Loading...
Need help?
General