You configure the profiles of the BGP neighbors of the device under Neighbor profiles.
- Name
- Contains the name of the profile.
Note: This name is used in the following tables, among other things:
- Neighbor profile under
- Neighbor profile under
- Neighbor profile under
- Route update delay
- This is the minimum delay in seconds between BGP advertisements sent by the device to neighbors using this profile.
- Send TTL
- Specifies the TTL (time to live) that the device adds to TCP packets sent to the BGP neighbors that use this profile.
For directly connected neighbors, this value is set to "1". For eBGP environments, you can increase this value by 1 per hop.
Note: For iBGP sessions, the device ignores this value and defaults to the maximum TTL value.Important: This value must be "0" if Recv TTL is set to a value other than "0". The device automatically uses the value "1" if both Send TTL and Recv TTL are set to "0".
- Recv TTL
- Specifies the minimum TTL (time to live) required of inbound TCP packets from BGP neighbors that use this profile. Inbound TCP packets must have a TTL greater than or equal to this value in order to be accepted.
Note: The device ignores this value in iBGP sessions.Note: If this value is not equal to "0", the device sets the internal value for Send TTL to "255".Important: This value must be "0" if Send TTL is set to a value other than "0".
- Keepalive
- Specifies the time in seconds for the keepalive timer. After this time has elapsed, the device sends a keepalive message to the neighbors using this profile in order to keep the BGP connection intact.
Note: The device must send at least three keepalive messages per unit of holdtime. For this reason the value should be max. one third of the holdtime. If the value is set higher than this or equal to "0", the LCOS automatically sets an internal value that is one-third of the holdtime.
- Short hold time
-
If the router does not receive regular BGP keepalive, update or notification messages within the configured BGP short-hold time, the router will terminate the BGP session and send a notification with the error code "Hold Timer Expired".
The device negotiates this value with the BGP neighbors during connection establishment. The lower of the two values is considered to be valid.
Note: If negotiation results in a value of "0", the device considers the connection to be valid until it receives a connection error or the connection breaks. No keepalive messages are sent to the BGP neighbors during this period, even if the keepalive timer is set with a value.Important: In accordance with the RFC, the values "1" and "2" are not permitted.
- Filter private AS
- Controls the removal/replacement of private AS entries (64512 – 65535, 4200000000 – 4294967294) from the AS_PATH list of outbound Network Layer Reachability Information (NLRI) messages of BGP neighbors that use this profile.
Note: This option has no function for iBGP connections.
- AS override
- Enables or disables the overriding of AS numbers in the AS_PATH outbound Network Layer Reachability Information (NLRI). With this option enabled, the device replaces all of the AS numbers of the BGP neighbors with its own AS number.
- Send default route
- This switch determines the behavior of the propagation of default routes. Possible values:
- Yes
- In BGP phase 3 (determining routes for redistribution), default routes are treated as normal routes.
- No
- Default routes are ignored if they are not sourced from the static BGP routes table (IPv4 networks or IPv6 networks).
- Connect retry timer
- Specifies the time in seconds that the router waits until the next connection attempt following a failed BGP connection attempt. Generally speaking, this option is only necessary to speed things up when the remote site is in the "passive" connection mode. Default: 120 seconds
- Comment
- Comment on this entry.
