Comtech EF Data / Stampede
FX Series Administration Guide - Version 6.2.2
86
Chapter: FX Series Configuration
Section: Quality of Service
MN-FXSERIESADM6 Rev 6
Redundancy OID:
The OID of the SNMNP query string used to ascertain whether the modem is in ‘active’ or ‘standby’
mode.
Redundancy match value:
Specifies a string to compare against to indicate the matching response to the ‘Redundancy
mode OID’ to determine if the satellite is in active mode.
Transmit rate OID:
The OID of the query string used to ascertain the current transmit data rate capacity. The
response to this query must be a numeric value.
Rate multiplier value:
The response to the ‘Transmit rate OID’ query is multiplied by this value to determine the data
rate in bits per second. The default multiplier value is 1.
Redundancy
States (
As shown in the QoS Real-Time Monitor)
:
ONLINE
:
Active modem, link speed will be determined by this modem
OFFLINE:
This modem is considered a backup; this state is only entered when the value polled from
redundancy OID does not match the “Redundancy match value”
NOT RESPONDING:
Modem does not respond to SNMP polls
The FX will continually poll all modems specified, transmit link speed will be determined by the
“ONLINE” modem. The online modem is determined as follows:
CASE 1: Only one modem is specified, this modem reports one of two states “ONLINE” or
“NOT RESPONDING”
CASE 2: Two modems are specified, polling the “Redundancy OID” matches the
“Redundancy match value”.
The FX assumes that a modem is unresponsive (NOT RESPONDING) if either of the following
cases is satisfied:
CASE 1: The modem has not yet been polled.
CASE 2: After 20 consecutive poll failures the modem status will change to “NOT
RESPONDING” in the QoS Real-Time Monitor and report a data rate of zero Kbps. If
the modem fails to respond in one second, it is considered an unsuccessful poll.
Unsuccessful polls will have an aggregate poll time of one polling cycle plus two
seconds for the ONLINE modem and one second for the OFFLINE modem.
The FX will attempt to determine data rate and redundancy state (if requested) over the
management interface. Modems polling will continue regardless of state, state will change when
a modem changes state or begins responding to SNMP polls.
NOTE: If both modems report “offline” or “not responding” the output QoS rate will
become the clear sky data of the LINK.
