Executive Overview

A total of six new POP nodes are added in Lahore, Karachi and Islamabad, two each. This helped in better POP to POP intraregional analysis and gave more reliability to measurements. Some POP nodes have unreachability issues for example ISL QAU, LHR GCU and KHI CPSP. Peshawar Region has highest RTT when accessed from any of the other regions.  Also, Peshawar to Islamabad RTT is higher than Peshawar to Karachi RTT. A clear difference of RTT in forward and reverse direction is seen for Intraregional POP in ISL and Lahore. Multan and Faisalabad POP have RTT from Islamabad. Islamabad to Karachi RTT is better than Islamabad to Lahore and Peshawar. Islamabad to Jamshoro POP has high RTT and IPDV each month. NEDUET and GIKI were unreachable all the time.

POP to POP Analysis

We study the performance evaluation in terms of link stability through the data collected by various monitoring sites running through the remote nodes that are deployed at PERN-POPs. The link stability is examined for by means of different performance evaluation metrics that include the throughput, the average and minimum Round Trip Time (RTT), the nodes unreachability and the corresponding packet loss observed. This study includes the performance evaluation between POP to POP nodes and between POP to Non-POP nodes, for the months June-November 2011. Some of the unpredictable situation in the network is supported by use of outliers presented at the end.

The POP to POP node pairs increased from September to October as we added 2 new POP nodes in each of Islamabad, Karachi and Lahore region. Figure 1 shows the increase in POP to POP node pairs. Throughput of POP to POP also increased over six months. Figure 2 shows the increase in POP to POP throughput from June to November. The black line shows the exponential increase trend line. It is observed that new POP nodes were added in three regions which already had one POP node each; resulting in high POP to POP throughput when the Node pairs are within the same region. As a result POP to POP throughput increased as shown in Figure 2.