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• Name: Enter a name for the IPv4 prefix list. Create a name that does not exceed 64 characters in length. Use numbers, any special characters, uppercase and lowercase letters, and even spaces. Start and end a name with any character but not a space. Leading and trailing spaces will be trimmed off automatically.
• Description: Enter the description for the IPv4 prefix list.
• Click Add and specify the following to add an IPv4 prefix to the list:
  • ACTION: Choose the action you want to apply to this IPv4 prefix list. Choose either DENY or PERMIT to disallow or allow or disallow traffic to the route that matches the prefix list.
  • PREFIX: Enter the IPv4 prefix. For example, to allow or disallow traffic to 10.0.0.0/8, enter 10.0.0.0/8.
  • IPV4 PREFIX LENGTH GE: Specifies the prefix length greater than or equal to the subnet value. This is the lowest value of the range of prefix length.
  • IPV4 PREFIX LENGTH LE: Specifies the prefix length less than or equal to the subnet value. This is the highest value of the range of prefix length.
  • SEQUENCE: To specify the entry point of this IPv4 prefix list among other BGP configurations, enter a number from 1 to 2147483646. 
    For example, if you configure ACTION = Permit, IPv4 PREFIX = 10.0.0.0/8, and IPv4 PREFIX LENGTH LESS OR EQUAL = 19, then all networks that fall within the 10.0.0.0/8 range AND have a subnet mask of /19 or less will be allowed through BGP.
• To delete a selected IPv4 prefix, click Remove. 

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• Expand the Peer Groups section, and do the following:
  • Click Add and enter the PEER GROUP NAME. 
    • In Description, enter the description of the BGP peer group.
    • In Graceful Restart, toggle this to True to enable and False to disable a graceful restart for a BGP neighbor.
    • In Password, enter the password used to reach the BGP neighbor.
    • In Remote As, specify the IP address of the remote AS.
    • In TTL Security, enter a minimum TTL (Time To Live) value for incoming IP packets received from peers in the remote AS. 
    • In Update Source, specify the IP address of the loopback interface so that BGP connections to the neighbor get sourced from the loopback IP.
    • Expand the Admin Shutdown section, and specify the following:
    • Expand the Neighbor IPv4 Unicast section, and specify the following:
    • Expand the Timers section, and specify the following:

    • Add a peer group by clicking Add in the bottom-right corner of the section.

  Add a peer group by clicking Add in the bottom-right corner of the section
  • Expand the Neighbor Param drop-down section, and do the following:
    • Enable: Toggle this to True to enable administrative shutdown. You can shut down the BGP peer groups administratively, without removing the configuration from BGP.
    • Message: Enter the message you want to use when shutting down the BGP peer groups.
    • Enabled: Toggle this to True to enable neighbor IPv4 unicast.
    • Next Hop Self: Enter the net hop network address you want to add to the routing table to ensure that the network is reachable.
    • Soft Reconfiguration: Toggle this to True to generate inbound updates from a BGP neighbor, change, and activate BGP policies without clearing the BGP session. 
    • Weight Attribute: Enter a number for the weight that BGP will use to choose a path. Note that the path with the highest weight is preferred.
    • Advertise Interval: Enter the number of seconds that must elapse between an advertisement or a withdrawal of routes to a BGP peer.
    • Connect Time: Enter the number of seconds that the BGP peer is to stay connected.
    • Hold Time: Specify the number of seconds that may elapse between successive KEEPALIVE or UPDATE messages received from a BGP peer before the peer connection ends.
    • Keep Alive: Specify the time interval, in seconds, during which routes from a BGP peer are suppressed according to the setting for the hold time.
  • In Description, enter the description of the BGP peer group.
  • In Graceful Restart, toggle this to True to enable and False to disable a graceful restart for a BGP neighbor.
  • In Password, enter the password used to reach the BGP neighbor.
  • In Remote As, specify the IP address of the remote AS.
  • In TTL Security, enter a minimum TTL (Time To Live) value for incoming IP packets received from peers in the remote AS. 
  • In Update Source, specify the IP address of the loopback interface so that BGP connections to the neighbor get sourced from the loopback IP.
  • Expand the Admin Shutdown section, and specify the following:
  • Expand the Neighbor IPv4 Unicast section, and specify the following:
  • Expand the Timers section, and specify the following:
  • • .

5. Click Save & Close.