Chapter 16 Interfaces
ZyWALL Series CLI Reference Guide
139
16.2.8.1 Connectivity Check Command Example
The following commands show you how to set the WAN1 interface to use a TCP handshake on port 8080
to check the connection to IP address 1.1.1.2
16.3 Ethernet Interface Specific Commands
This section covers commands that are specific to Ethernet interfaces.
The default IPv4 LAN subnet range starts from 192.168.1.0/24. The following list shows the examples of
what the IPv4 LAN subnet range will change to if it conflicts with the WAN IPv4 address.
• 192.168.1.0/24 will change to 192.168.10.0/24.
• 192.168.2.0/24 will change to 192.168.11.0/24.
• 192.168.3.0/24 will change to 192.168.12.0/24.
• 192.168.4.0/24 will change to 192.168.13.0/24.
If you upgrade the Zyxel Device firmware version from 4.29 to 5.31, and your settings in the Zyxel Device
firmware version 4.29 meets the conditions listed below, the default LAN subnet will change when the
IPv4 address the WAN interface gets from the DHCP server conflicts with any IPv4 address in the default
LAN subnet:
• The WAN is using a static IPv4 address.
• The WAN is using a dynamically assigned IPv4 address.
• The WAN is using an IPv4 address assigned by the PPPoE server.
If the Zyxel Device is using firmware version 5.31, when the WAN IPv4 address conflicts with any IPv4
address in the default LAN subnet, the Zyxel Device will only change the default LAN subnet if it is in
default settings.
When you configure the WAN or the LAN IPv4 networks, please note that they must not conflict with
each other. The Zyxel Device will not automatically change the LAN IPv4 subnet if the WAN IPv4 address
conflicts with the LAN IPv4 networks you configure.
Router# configure terminal
Router(config)# interface wan1
Router(config-if-wan1)# ping-check 1.1.1.2 method tcp port 8080
Router(config-if-wan1)# exit
Router(config)# show ping-check
Interface: wan1
Check Method: tcp
IP Address: 1.1.1.2
Period: 30
Timeout: 5
Fail Tolerance: 5
Activate: yes
Port: 8080
Router(config)#
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