Our T1 average monthly usage is 20%, I'm told. With a packet sniffer, it looks like we're using about 40% right now. We have about 30 users, email and VPN.
I just thought the jumps of 190ms seemed insane?
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Question
High jitter/latency over T1?
Does this seem like a high rate of jitter/latency over a T1?
I have been monitoring by pinging from a server on one end of the T1 to the router connected to the other end. 1 hop.
The line itself is a local loop, no more than 10 miles.
Graphs:
First graph is a 24 hour timeframe, 32byte ping, 5 minute average
Second graph is a 60 minute timeframe, 32byte ping, 15 sec intervals
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Answers
Those are pretty high spikes, but it could be one of those unusual instances where a large number of people sent out an email, hit a website, or were pulling some information from the server all at the same time. If you are running at 20-40% of a T1 with about 30 users, email and VPN, I wouldn't worry too much about it at this time. When you start hitting around 60-70% I would look at what my users are doing, and start considering ways to implement controls on what my users are able to access/use (which you might want to implement anyway depending on your company poilicies on internet usage).
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by: WcombeePosted on 2008-03-14 at 13:47:23ID: 21129396
My first question from looking at these 2 graphs. Your greatest latancy periods are taking place during normal business hours. Yes, it may be a bit extreme for a 1 hop ping, but....how much traffic do you have going on your network? How many clients, how much email traffic, is anyone doing file sharing..so many questions.
Your second graph seems to start at @ 14:10, once again pretty much middle of the business day, and while you have spikes of fairly high latancy, the majority of the time it seems to b e pretty well off, under 10ms.
You might want to check the network traffic that is going on, check your firewall and/or proxy to see where your clients are heading out to, and what is being directed your way.