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Configuring DRO-250i
constantly filled by some virtual pieces of information called tokens, at a
specific rate (token rate). The most important parameter of the bucket is its
size that is the number of tokens it can store.
Handle:
Queues are identified by a handle <major number, minor number>, where
the minor number is zero for queues. Major number uniquely identified
the queue.
Parent:
Parent does not apply for root qdisc.Major number represents the parent of
the sub-queue or child queue. This will be equal to the Handle major
number of parent queue. Parent minor number will be minor number of
the class to whom it (TBF) belongs.
Limit:
Limit is the number of bytes that can be queued waiting for tokens to
become available i.e. maximum amount of time a packet can sit in the
TBF.
Burst:
Burst is the size of the bucket, in bytes. This is the maximum amount of
bytes that tokens can be available instantaneously. In general, larger
shaping rates require a larger buffer. For 10Mbps on Intel, user needs at
least 10kbyte buffer if user wants to reach configured rate. If buffer is too
small, packets may be dropped because more tokens arrive per timer tick
than fit in bucket.
Rate:
Rate of the traffic a qdisc can handle
e.g. TBF can be a child of a PQ, and user can configure by entering values
like rate as 115 Kbps, burst as 5Kb and larency as 70 ms. These value are
given just for an example
DRO-250i User Manual
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