Nortel Networks 5520, 5530, 5510 manual Actual Bucket Size, Policing Traffic, Parameter Description

Filters and QoS Configuration for ERS 5500
Technical Configuration Guide	v2.0	NN48500-559

5.1 Actual Bucket Size

When configuring a meter or shape rate, a fixed token bucket is also configured which is derived from the committed rate, burst rate, and burst duration configured. If a burst duration is not configured, the largest bucket size is automatically selected which would be 512K for a 10/100 Mbps or 1 GigE port. If you wish to use another bucket size, you must calculate the burst duration by using the actual size of the bucket - Sections 5.2 and 5.3 provide examples. The following table, Table 7, shown below displays the actual bucket size in bytes.

Table 7: Actual Bucket Size in Bytes

Bucket Size	Actual size in bytes	Interface
4K	4,096	10/100 Mbps and GigE
8K	8,192	10/100 Mbps and GigE
16K	16,384	10/100 Mbps and GigE
32K	32,768	10/100 Mbps and GigE
64K	65,536	10/100 Mbps and GigE
128K	131,072	10/100 Mbps and GigE
256K	262,144	10/100 Mbps and GigE
512K	524,288	10/100 Mbps and GigE
1024K	1,048,576	10 GigE (5530)
4096K	2,097,152	10 GigE (5530)
8192K	8,388,608	10 GigE (5530)

5.2 Policing Traffic

When configuring traffic policing, the committed rate, burst rate, and burst duration can be configured using the following command:

•5530-24TFD(config)#qos meter <1-55000> committed-rate <64-10230000 Kbits/sec> max-burst-rate <64-4294967295 Kbits/sec> max-burst-duration <1-4294967295 Milliseconds> in-profile-action <1-55000> out-profile-action [<1-1><9-55000>]

QoS parameters:

Parameter	Description
<1-55000>	Enter an integer to specify the QoS meter; range is 1 to 55000.
name <WORD>	Specify name for meter; maximum is 16 alphanumeric
	characters.
committed-rate	Specifies rate that traffic must not exceed for extended periods to
<64-10230000>	be considered in-profile. Enter the rate in Kb/s for in-profile traffic
	in increments of 1000 Kbits/sec; range is 64 to 10230000
	Kbits/sec.
max-burst-rate	Specifies the largest burst of traffic that can be received in a
<64-4294967295>	given time for the traffic to be considered in-profile. Used in
	calculating the committed burst size. Enter the burst size in Kb/s
	for in-profile traffic; range is 64 to 294967295 Kbits/sec
max-burst-duration	Specifies the amount of time that the largest burst of traffic can
<1-4294967295>	be received for the traffic to be considered in-profile. Used in
	calculating the committed burst size. Enter the burst duration in
	ms for in-profile traffic; range is 1 to 4294967295 ms.
in-profile-action <1-55000>	Specify the in-profile action ID; range is 1 to 55000.
in-profile-action-name	Specify the in-profile action name.
<WORD>

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