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User's Manual Part 2

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Release8InstallationandConfigurationGuide
Issue2,November2007 Draft5forRegulatoryReview 274
DHCP Client Enable/Disable
Select either
• Enabled to allow the network DHCP server to assign IP addresses, subnet
masks, and gateway IP addresses to devices that are attached to the SM.
• Disabled to
• disable DHCP server assignment of this address.
• enable the operator to assign this address.
The implementation of NAT with DHCP client is illustrated in Figure 42 on Page 159.
The implementation of NAT with DHCP client and DHCP server is illustrated in Figure 41
on Page 158. The implementation of NAT without DHCP is illustrated in Figure 44 on
Page 161.
DHCP Server Enable/Disable
Select either
• Enabled to
• allow this SM to assign IP addresses, subnet masks, and gateway IP
addresses to attached devices.
• assign a start address for DHCP.
• designate how many IP addresses may be temporarily used (leased).
• Disabled to disallow the SM to assign addresses to attached devices.
The implementation of NAT with DHCP server is illustrated in Figure 43 on Page 50.
The implementation of NAT with DHCP client and DHCP server is illustrated in Figure 41
on Page 158. The implementation of NAT without DHCP is illustrated in Figure 44
on
Page 161.
DHCP Server Lease Timeout
Based on network performance, enter the number of days between when the DHCP
server assigns an IP address and when that address expires. The range of values for this
parameter is 1 to 30 days. The default value is 30 days.
DNS IP Address
Select either
• Obtain Automatically to allow the system to set the IP address of the DNS
server.
• Set Manually to enable yourself to set both a preferred and an alternate DNS IP
address.
Preferred DNS IP Address
Enter the preferred DNS IP address to use when the DNS IP Address parameter is set
to Set Manually.
Alternate DNS IP Address
Enter the DNS IP address to use when the DNS IP Address parameter is set to Set
Manually and no response is received from the preferred DNS IP address.
The NAT tab also contains the following buttons.