Media5 Mediatrix 4104, Справочное руководство

Страница: 182 / 466

Chapter 8 - IP Address and Network Configuration Error Handling
160 Mediatrix 4104
Error Handling
In the event of a network or server failure, this section describes the application behaviour and/or replacement
values to use.
DHCP Server Failures
If the Mediatrix 4104 cannot contact the DHCP server, it performs one of the following actions:
1. Retries contacting the DHCP server until it answers. The Mediatrix 4104 does not restart.
2. Uses the replacement value from Table 98 for all variables that depend on the DHCP.
This assumes that the Mediatrix 4104 is set to get its IP information via a DHCP server.
If the Mediatrix 4104 is configured to request some DHCP options but does not require an IP address from the
server, the amount of time it will wait for an answer before proceeding further is configurable as defined in
“Appendix - DHCP Options Waiting Time” on page 152 .
Vendor/Site Specific Option Missing
If a vendor specific or site specific option is missing from the DHCP server answer, the Mediatrix 4104 uses
the replacement value from
Table 98 for each variable that depends on missing vendor/site specific options.
DNS Failures
If the DNS cannot be contacted, the Mediatrix 4104 performs the following steps:
1. The Mediatrix 4104 sends a first request to the primary DNS server.
2. If the DNS server cannot be contacted within two seconds, the Mediatrix 4104 sends a request to
the secondary DNS server.
3. If the secondary DNS server cannot be contacted, the Mediatrix 4104 uses the replacement value
from
Table 98 for all variables that depend on the DNS.
Table 98: Replacement Values for Error Recovery
Type Variable Replacement value
IP address (All variables of that type) 0.0.0.0
String (All variables of that type) “”