Comtech EF Data FX series 1005 Administrator's Manual page 85

Comtech EF Data / Stampede
Drain algorithm:
This field specifies the drain method for scheduling outbound packets for all Queue definitions.
Strict Priority:
In the Strict Priority Drain algorithm, higher priority queues are depleted before lower priority queues
pass traffic. Traffic is capped at the link rate.
Min-Max:
The Min-Max drain algorithm is priority based. If there is enough data rate available, each queue will
receive their respective CIR. If there is not sufficient data rate to satisfy all requested CIRs, then
traffic will be dropped starting with the lowest priority queue and progressing through the queues in
ascending priority until the requested CIR is met.
When traffic is dropped from queues with the same priority, then each of the equal queues will have
traffic dropped proportionally. Once all requested CIRs are met, if there is additional data rate that
can be filled, it will be allocated to the queues in order of priority starting with the highest. Each
queue is given additional data rate up to the requested rate, or MIR, whichever is lowest. If there are
queues at the same priority, they are granted additional data rate proportionally.
Poll satellite modem:
Enable or Disable polling of the satellite modem over the FX management interface. The default value is
'Disabled'. For 1:1 redundancy, both a primary and secondary modem may be specified, in which case the
transmit data rate capacity of the modem which identifies itself as the "active" will be used for bandwidth
allocation calculations. The FX assumes that both the primary and secondary modems are configured
with the same SNMP community and are the same modem type.
Primary 1 IP address:
This is the IP address of the primary satellite modem. (This field must be entered if polling is
enabled).
Secondary 2 IP address:
For 1:1 redundancy, this is the IP address of the secondary modem. If the secondary modem
responds, then its rate will be used. If a second modem is specified, then the FX assumes that both
are configured with the same SNMP community.
SNMP community:
This is the read-only community of the satellite modems.
Poll frequency (msecs):
This is the number of milliseconds that the FX waits between polls to ascertain the data rate from the
modem. (Default: 250)
Reserve bandwidth (kbps):
The data rate that the FX delivers data is the Ethernet frame rate. This parameter sets the amount of
bandwidth that will be held in reserve. The FX will deliver data at the rate read from the modem
minus this rate. This will allow for any mismatch between the Ethernet frame rate, and the rate that
the modem reports.
Modem type:
This allows you to set the CEFD satellite modem type. (Default: CDM-750). If 'Other' is chosen then
the following fields become accessible to ascertain the transmit data rate and redundancy mode:
FX Series Administration Guide - Version 6.2.2
Chapter: FX Series Configuration
Section: Quality of Service
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MN-FXSERIESADM6 Rev 6