It is very difficult to optimize the dead time due to the great diversity of load on a system. However, it is possible to study each type of load separately and thereby be able to define a typical dead time.
Path: Configuration > Network > Port Speed
The Port Speed setting defines the communication speed of the TCP/IP port.
• For Auto-negotiation (the default), Ethernet devices negotiate to transmit at the highest possible
speed, but if the supported speeds of two devices are unmatched, the slower speed is used.
• Alternatively, you can choose 10 Mbps or 100 Mbps, each with the option of half-duplex
(communication in only one direction at a time) or full-duplex (communication in both directions
on the same channel simultaneously).
Configure DNS
Path: Configuration > Network > DNS > Configuration
Use the options under Configuration to configure and test the Domain Name System (DNS):
• Override Manual DNS Settings: When enabled, configuration data from other sources (typically
DHCP) takes precedence over the manual configurations set here.
• Primary DNS Server or Secondary DNS Server: Select one of these to specify the IPv4 or IPv6
addresses of the primary and optional secondary DNS server. For the Rack ATS to send e-mail,
you must at least define the IP address of the primary DNS server.
– The Rack ATS waits up to 15 seconds for a response from the primary DNS server or
secondary DNS server (if specified). If the Rack ATS does not receive a response within that
time, e-mail cannot be sent. Use DNS servers on the same segment as the Rack ATS or on a
nearby segment (but not across a wide-area network [WAN]).
– Define the IP addresses of the DNS servers, then enter the DNS name of a computer on your
network to look up the IP address for that computer to verify correct operation.
• System Name Synchronization: Allow the system name to be synchronized with the host name
so both fields automatically contain the same value.
NOTE: When enabling this feature, the system name identifier can no longer contain a space
character (since it will be synchronized to the host name field).
• Host Name: Configure a host name here and a domain name in the Domain Name field. Users
can then enter a host name in any field in the NMC interface (except e-mail addresses) that
accepts a domain name.
• Domain Name (IPv4/IPv6): Configure the domain name here only. In all other fields in the NMC
interface (except e-mail addresses) that accept domain names, the Rack ATS adds this domain
name when only a host name is entered.
DHCPv6 Mode
(continued) • M, or M and O are set: In this situation, full DHCPv6 address configuration occurs. DHCPv6 is
used to obtain addresses AND other configuration settings. This is known as DHCPv6
stateful. Once the M flag has been received, the DHCPv6 address configuration stays in
effect until the interface in question has been closed. This is true even if subsequent router
advertisement packets are received in which the M flag is not set.
If an O flag is received first, then an M flag is received subsequently, the ATS performs full
address configuration upon receipt of the M flag
• Only O is set: In this situation, the NMC sends a DHCPv6 Info-Request packet. DHCPv6 will be
used to configure “other” settings (such as location of DNS servers), but NOT to provide
addresses. This is known as DHCPv6 stateless.
Address and Other Information: With this radio box selected, DHCPv6 is used to obtain
addresses AND other configuration settings. This is known as DHCPv6 stateful.
Non-Address Information Only: With this radio box selected, DHCPv6 will be used to
configure "other" settings (such as location of DNS servers), but NOT to provide addresses. This
is known as DHCPv6 stateless.
Never: Select this to disable DHCPv6.
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