Chapter 7 Interfaces
Table 53 Configuration > Network > Interface > VLAN > Create Virtual Interface (continued)
LABEL | DESCRIPTION |
MTU | Maximum Transmission Unit. Type the maximum size of each data packet, in bytes, |
| that can move through this interface. If a larger packet arrives, the ZyWALL divides it |
| into smaller fragments. Allowed values are 576 - 1500. Usually, this value is 1500. |
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Connectivity Check | The ZyWALL can regularly check the connection to the gateway you specified to make |
| sure it is still available. You specify how often to check the connection, how long to wait |
| for a response before the attempt is a failure, and how many consecutive failures are |
| required before the ZyWALL stops routing to the gateway. The ZyWALL resumes routing |
| to the gateway the first time the gateway passes the connectivity check. |
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Enable | Select this to turn on the connection check. |
Connectivity |
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Check |
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Check Method | Select the method that the gateway allows. |
| Select icmp to have the ZyWALL regularly ping the gateway you specify to make sure it |
| is still available. |
| Select tcp to have the ZyWALL regularly perform a TCP handshake with the gateway |
| you specify to make sure it is still available. |
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Check Period | Enter the number of seconds between connection check attempts. |
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Check Timeout | Enter the number of seconds to wait for a response before the attempt is a failure. |
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Check Fail | Enter the number of consecutive failures before the ZyWALL stops routing through the |
Tolerance | gateway. |
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Check Default | Select this to use the default gateway for the connectivity check. |
Gateway |
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Check this | Select this to specify a domain name or IP address for the connectivity check. Enter |
address | that domain name or IP address in the field next to it. |
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Check Port | This field only displays when you set the Check Method to tcp. Specify the port |
| number to use for a TCP connectivity check. |
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DHCP Setting | The DHCP settings are available for the OPT, LAN and DMZ interfaces. |
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|
DHCP | Select what type of DHCP service the ZyWALL provides to the network. Choices are: |
| None - the ZyWALL does not provide any DHCP services. There is already a DHCP |
| server on the network. |
| DHCP Relay - the ZyWALL routes DHCP requests to one or more DHCP servers you |
| specify. The DHCP server(s) may be on another network. |
| DHCP Server - the ZyWALL assigns IP addresses and provides subnet mask, gateway, |
| and DNS server information to the network. The ZyWALL is the DHCP server for the |
| network. |
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| These fields appear if the ZyWALL is a DHCP Relay. |
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Relay Server 1 | Enter the IP address of a DHCP server for the network. |
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Relay Server 2 | This field is optional. Enter the IP address of another DHCP server for the network. |
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| These fields appear if the ZyWALL is a DHCP Server. |
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IP Pool Start | Enter the IP address from which the ZyWALL begins allocating IP addresses. If you |
Address | want to assign a static IP address to a specific computer, click Add Static DHCP. |
| If this field is blank, the Pool Size must also be blank. In this case, the ZyWALL can |
| assign every IP address allowed by the interface’s IP address and subnet mask, except |
| for the first address (network address), last address (broadcast address) and the |
| interface’s IP address. |
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ZyWALL 110/310/1100 Series User’s Guide | |
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