ZyXEL ZyWALL ATP700 User Guide - Page 360
Example Scenario
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Chapter 10 Routing Table 141 Configuration > Network > Routing Protocol > BGP (continued) LABEL DESCRIPTION Update Source Use this to allow BGP sessions use the selected interface for TCP connections. MD5 authentication key Weight Keepalive Time Hold Time Maximum Prefix OK Cancel • 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 63 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. 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. ZyWALL ATP Series User's Guide 360