Before You Begin - ZyXEL Communications X6004 User Manual

Chapter 22 ZyStack
The following example shows an example where your IP phones are located in different
subnets on your network. The X6004s are still on the same subnet (Subnet 1). IP phones in
Subnet 2 and Subnet 3 are both SIP clients of X6004 A. In this example, Subnet 3 has been
configured as a local subnet. When X6004 A receives a call from a phone on Subnet 3 that is
directed to a SIP client of X6004 B, it is then able to redirect the call directly to X6004 B.
Subnet 2, however, has not been configured as a local subnet. Calls that originate from
Subnet 2 must go through X6004 A and B in order to reach SIP clients connected to B.
Figure 253 Internal Call Routing
Subnet 1
192.168.1.0/24
Subnet 2
172.10.10.0/24
172.10.10.1

22.1.3 Before You Begin

Before you start to configure a ZyStack, please do the following.
• All the X6004s should use the same interface, either LAN or WAN, to create a ZyStack.
The setting on the master X6004 determines which interface the X6004s should use.
• All the X6004s should be on the same subnet. This is necessary for the X6004s to be able
to backup each other. The failsafe mechanism utilizes IP alias. IP alias allows the X6004
to communicate via two IP addresses. The first is the IP address assigned to the X6004
itself and the second is the IP address of the X6004 that has failed. This feature is limited
to a single routing domain.
22.2 ZyStack Setting
Use this screen to view and manage your ZyStack settings. Click Configuration > ZyStack >
Settings in the navigation panel to view the screen as shown.
276
192.168.1.1
A
10.1.1.1
B
192.168.1.2
192.168.1.102
Subnet 3
10.1.1.0/24
X6004 User's Guide