An ISP plans to create a policer to ensure that Tc = 0.125 sec Bc ( CBS)
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Question:
- An ISP plans to create a policer to ensure that
- Tc = 0.125 sec
- Bc (CBS) = 1Mbytes (maximum size)
- CIR = Bc/Tc = 8MB/s = 64Mbps
- Single rate, two color mode policer is utilized on the ingress ISP router
- Assume token bucket algorithm is used, the CBS bucket (Bc) initially starts FULL
In the table below, specify what action (forward or drop) the router takes on the ingress data based on the policer action. (NOTE: some or all of the ingress data may be forwarded or dropped).
Time | B (ingress data) | CBS bucket size | Action |
0 | 1MB | 1MB (initial) |
|
.125 | 0.75MB |
|
|
.250 | 1.25MB |
|
|
.375 | 1.5MB |
|
|
.500 | 0.5MB |
|
|
.625 | 0.5MB |
|
|
.750 | 2.25MB |
|
|
.825 | 1.5MB |
|
|
1.00 | 1.0MB |
|
|
Related Book For
Income Tax Fundamentals 2013
ISBN: 9781285586618
31st Edition
Authors: Gerald E. Whittenburg, Martha Altus Buller, Steven L Gill
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