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Configuring the Network
Basic Setup
Cisco SPA232D Administration Guide 33
3
Optional Settings
MTU The Maximum Transmission Unit (MTU) setting specifies
the largest protocol data unit (in bytes) permitted for
network transmission. Generally, a larger MTU means
greater efficiency. However, a larger packet may cause
delays for other traffic and is more likely to become
corrupted. In most cases, you should keep the default
setting, Auto, to allow the ATA to choose the appropriate
MTU. To specify the MTU, select Manual, and then enter
the number of bytes.
Field Description
Feature Description
Host Name The name of the ATA. The default value is the model
number. Your ISP may specify a host name to use.
Domain Name The domain name, if specified by your ISP. Otherwise,
leave the field blank.
DNS Server Order Choose the preferred method for choosing a DNS server.
• DHCP-Manual—The DNS server settings from
the network server will take precedence, and your
entries in the DNS fields below will be used only
as a backup.
• Manual-DHCP—Your entries in the DNS fields
below will take precedence, and the DNS server
settings from the network server will be used as a
backup.
• Manual—Your entries in the DNS fields below will
be used to choose a DNS server.
Primary DNS Enter the IP address of the primary Domain Name
Service (DNS) server to use for domain name resolution.
Keep the default entry, 0.0.0.0, to use the primary DNS
server that is specified for the WAN connection.