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We see that the min of min RTT for PoP was 35.827ms , avg of min RTT was 36.02, max of min RTT was 36.203, IQR of min RTT was 0.294 (see table for pingerjms.pern.edu.pk column 1 and 2).
pingerjms.pern.edu.pk | Min RTT (ms) | Avg RTT (ms) | Max RTT (ms) |
|---|---|---|---|
Min | 35.827 | 35.879 | 35.91 |
Avg | 36.02 | 36.07 | 36.16 |
Max | 36.203 | 36.293 | 36.711 |
Median | 36.131 | 36.174 | 36.224 |
IQR | 0.294 | 0.295 | 0.293 |
Similarly, we have the min, avg, max, median and IQR for Min RTT, Average RTT and Max RTT for the usindh node in the table shown below.
pinger.usindh.edu.pk | Min RTT (ms) | Avg RTT (ms) | Max RTT (ms) |
|---|---|---|---|
Min | 36.388 | 36.973 | 37.057 |
Avg | 37.04 | 37.23 | 37.511 |
Max | 37.352 | 39.032 | 44.613 |
Median | 37.023 | 37.252 | 37.381 |
IQR | 0.271 | 0.27 | 0.332 |
...
These tables can also be viewed in the spreadsheet attached above attached.
On average there is a difference of 1.02ms in Min RTT, 1.16ms in Average RTT and 1.35ms in Max RTT for the two nodes. Usindh PoP is performing better than Usindh non-PoP node.
Another interesting information is that for PoP node, difference in min of min RTT for 1000 bytes and 100 bytes of data is 0.287ms. This means that 900 bytes of data take a min RTT of 0.287ms to reach PoP usindh. This makes the bottleneck capacity to be 25.087Mbps. On the other hand for usindh non-PoP node, difference in min of min RTT for 1000 bytes and 100 bytes of data is 0.638ms. This means that 900 bytes of data take a min RTT of 0.638ms to reach PoP usindh. This makes the bottleneck capacity to be 11.285 Mbps.
Traceroute Results from pinger.pern.edu.pk
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Extra hops can be seen in Usindh traceroute (hop 6 and 7). For both of the nodes, it takes 36.105 ~ 36.4 ms to reach the hop khi77.pie.net.pk, however, as the hops are increased for accessing usindh , an increased RTT of 0.9 ms is observed. This is a small difference in RTT for the two nodes which is added due to two extra hops and it supports the results shown above in graphs.
It is observed that a bimodal pattern is seen in min RTT, that is for Pern POP min RTT was 35.87 ms till 6th of june and then it increased to 36.16 ms. Similar is the case for non PoP usindh node. However when we compared the traceroutes on 5th June and 8th June, it was found that there weren't any additional hops. The increase in min RTT was due to the hops of rwp44.pie.net.pk and khi77.pie.net.pk showing increased RTT. See below the traceroute results for 5th June from Pern PoP Islamabad to Pern PoP Jamshoro
| Code Block |
|---|
Executing exec(traceroute, -m 30 -q 3 -f 3, 121.52.155.62, 140)
traceroute to 121.52.155.62 (121.52.155.62), 30 hops max, 140 byte packets
4 rwp44.pie.net.pk (221.120.251.58) 35.475 ms 35.443 ms 35.426 ms
5 khi77.pie.net.pk (221.120.205.70) 36.104 ms 36.332 ms 36.394 ms
6 172.31.253.66 (172.31.253.66) 36.084 ms 36.184 ms 36.238 ms
7 usindh.edu.pk (121.52.156.130) 36.701 ms 36.821 ms 36.757 ms
8 (121.52.155.62) 37.273 ms !X 37.258 ms !X 37.244 ms !X
|
And the traceroute results on 8th June were as below:
| Code Block |
|---|
Executing exec(traceroute, -m 30 -q 3 -f 3, 121.52.155.62, 140)
traceroute to 121.52.155.62 (121.52.155.62), 30 hops max, 140 byte packets
4 rwp44.pie.net.pk (221.120.251.58) 35.770 ms 35.710 ms 35.721 ms
5 khi77.pie.net.pk (221.120.205.70) 41.929 ms 41.979 ms 42.033 ms
6 172.31.253.66 (172.31.253.66) 36.404 ms 36.572 ms 36.593 ms
7 usindh.edu.pk (121.52.156.130) 36.901 ms 37.043 ms 36.959 ms
8 (121.52.155.62) 37.442 ms !X 37.427 ms !X 37.411 ms !X
|
A slight increase in RTT is seen for the two above mentioned hops. So far we are unable to find out the reason for this increase in RTT for these two hops. A similar increase in RTT is seen for the same two hops for the non PoP node (pinger.usindh.edu.pk) as well.
Comparison of Khi-PoP and
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NEDUET
As the results of jamshoro and university of sindh do not go with the theoretical analysis, we tried to find out the performance of other PoPs as compared to one other pern node in the same city.
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Now we want to confirm it by checking some other POP and non POP pair.
Comparison of Islamabad-PoP and NCP
We now tried to compare the average RTT from Pakistan to PERN POP Islamabad and to NCP (National College of Physics, Islamabad).
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The results are not enough to reach a conclusion so we decided to make yet another comparison on a POP - Non PoP pair.
Comparison of Quetta-PoP and UOB
We here compared quetta POP and Non PoP.
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