Example Scenario - ZyXEL Communications ZyWall ATP series User Manual

Table 132 Configuration > Network > Routing Protocol > BGP (continued)
LABEL
Update Source
MDS authentication
key
Weight
Keepalive Time
Hold Time
Maximum Prefix
OK
Cancel

10.8.4 Example Scenario

This is an example scenario for using BGP on the Zyxel Device.
10.8.4.1 Scenario: CE - PE (MLPS)
In this scenario, you want to transmit BGP packets from a CE router (Zyxel Device) to a peer BGP PE
router in an MPLS network.
• CE: The Zyxel Device is the customer edge router located on the customer premises and connects to
a PE router in the service provider MPLS network.
• PE: The provider edge router is located at the edge of the service provider MPLS network.
• MPLS: MultiProtocol Label Switching (MPLS) forwards data from one network node to the next based
on path labels rather than network addresses.
Chapter 10 Routing
DESCRIPTION
Use this to allow BGP sessions use the selected interface for TCP connections.
• Choose Gateway and then enter the gateway IP address
• Choose Interface and then select a Zyxel Device interface.
• Choose None to use the closest interface.
Type the default password for MD5 authentication of communication between the Zyxel
Device and the peer BGP router. The password can consist of alphanumeric characters
and the underscore, and it can be up to 16 characters long.
Specify a weight value for all routes learned from this peer BGP router in the specified
network. The route with the highest weight gets preference.
Keepalive messages are sent by the Zyxel Device to a peer BGP router to inform it that
the BGP connection between the two is still active. The Keepalive Time is the interval
between each Keepalive message sent by the Zyxel Device. We recommend Keepalive
Time is 1/3 of the Hold Time time.
This is the maximum time the Zyxel Device waits to receive a Keepalive message from a
peer BGP router before it declares that the peer BGP router is dead. Hold Time must be
greater than the Keepalive Time.
A prefix is a network address (IP/subnet mask) that a BGP router can reach and that it
shares with its neighbors. Set the maximum number, from 1 to 4294967295, of prefixes that
can be received from a neighbor. This limits the number of prefixes that the Zyxel Device
is allowed to receive from a neighbor. If extra prefixes are received, the Zyxel Device
ends the connection with the peer BGP router. You need to edit the peer BGP router
configuration to bring the connection back.
Click OK to save your changes back to the Zyxel Device.
Click Cancel to exit this screen without saving.
ZyWALL ATP Series User's Guide
324