Let’s calculate the round trip time (RTT) between client and server. Assuming that the initial TTL is 255 we can infer that 8 routers sit between the client and the server. So we have to assume the trace was recorded locally or through a SPAN port on the same LAN segment. Every router will decrement this number by one when forwarding the packet. IP stacks often (but not always) use the initial TTL of 255, 128 or 64 when transmitting a packet. Noteworthy detailsįrames 47 through 49 reveal a few noteworthy details. Your personal preferences might be different. For this article the client connection is colored with option 1 and the server side is highlighted with option 6. I also like the colors to stand out when using the Wireshark default color set. I tend to use colors with a strong contrast between background and foreground. Right-click on frame 47 and select from the pop-up window “Colorize conversation -> TCP” and click your favorite color. Instead, I use a feature that seems to be somewhat underrated: Colorize conversation. The filter will hide STP topology changes, routing updates, ARP storms and other interesting events. I don’t want to focus too much on this single TCP session – at least not yet.Follow TCP stream is most useful when dealing with application layer problems in plain text protocols (or when Wireshark can decrypt the traffic).
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