Tag: network performance - NetCraftsmen, a BlueAlly Company

Detecting Network Packet Loss

I’ve been writing blogs for nojitter.com for the past several months. I thought that links from here would be useful so that anyone following my blog posts can find them [...]

Understanding Interface Errors and TCP Performance

Not all network engineers understand the impact of interface errors on TCP performance. Interface errors can cause a BIG impact, although it may not be intuitive at first glance. We recently pointed out some interfaces with extremely high errors to a customer. We mentioned that the links with the highest…

Terry Slattery

Application Analysis Using TCP Retransmissions, Part 2

In my last post, Wikipedia on Transmission Control Protocol). A packet is assumed to be lost when an ACK has not been received within 2 * RTT. So network buffering [...]

Terry Slattery

Application Analysis Using TCP Retransmissions, Part 1

I’ve been doing a number of network assessments recently and one of the factors that I use to determine network health is the number of TCP retransmissions that occur. I [...]

A Network Management Architecture, Part 2

In A Network Management Architecture, Part 1, I discussed a Network Management Architecture, composed of seven elements, shown in the figure below. I described the Event and NCCM elements in [...]