Example Scenario - ZyXEL Communications ZyWall 110 User Manual

Table 149 Configuration > Network > Routing Protocol > BGP (continued)
LABEL
Keepalive Time
Hold Time
Maximum Prefix
OK
Cancel

11.8.4 Example Scenario

This is an example scenario for using BGP on the Zyxel Device. See also
information on configuring an IPSec tunnel to an Amazon VPC (Virtual Private Cloud).
11.8.4.1 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: Multi Protocol Label Switching (MPLS) forwards data from one network node to the next based
on path labels rather than network addresses.
Figure 300 Scenario 1: CE Router - to - MPLS
Chapter 11 Routing
DESCRIPTION
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 USG Series User's Guide
431
Section 29.2 on page 603 for