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Internet very slow, Over utilization ???

Goraps
Goraps asked
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I have a T1 1.5meg with about 35 internal users going out for internet and about 4 to 8 coming in on it via VPN to access interal resources. ISP is telling me that the circuit is over utilized... but looking at the reports they are sending me it doesn't look over utilized at all... It it was over utilized I was thinking of going with a Bonded T1 3meg... or going with a seperate ADSL circuit for internal staff's internet access.  Not sure what the best path would be pricing / solution.
Util-Report.JPG
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Commented:
The measures are in Bytes (8 bits)
You are using all of your 1.5 Mbps bandwidth.

Commented:
Actually you have 1.5 Mbps = 1500/8 MBps = 187.5 MBps

Commented:
Using one 3 Meg is more efficient if correctly configured, but it needs more skills in configuring your router for assigning queues and priorities.
Using 2 separate 1.5 Megs is less efficient but guaranties each group of your users (internal/external) have at least the 1.5 Meg bandwidth. It also provides some sort of redundancies in case one link or device fails.
GorapsI.T. Manager

Author

Commented:
I am thinking of going with a bonded T1 3meg..  but it would be cheaper to go with a seperate ADSL 7Meg down 640K up for internal staff to use for internet and email access.

Commented:
From your internet usage graph, 640K for uplink may not be enough. What are your other options with a higher upload rate?
GorapsI.T. Manager

Author

Commented:
Only other option is a bonded T1 3meg.   3megs up 3 megs down.
 
GorapsI.T. Manager

Author

Commented:
Here is a screen shot of the types of usage:
 
 

PIE.png

Commented:
From the bandwidth graph, you already use 100 KB = 800 Kb up. This is internal users upload + VPN users download.
Consider that this is not probably your worst case and that the numbers in the graph are not real usage but average usage during a period of probably 30 minutes for a weekly graph like this.
If you ask them for a day by day graph, your will see a better view of the usage and probably your upload usage will increase to something around 1.2 Meg.

You should decide what percentage of this is related to internal users. If you believe more that 600 Kb of this is used by internal users, then the 640K up will not be enough for you.
GorapsI.T. Manager

Author

Commented:
BTW: these pie charts are from our internal Firewall.. not the ISP.   Here is the last 24hrs.

Last-24hr-Util.JPG
Commented:
This chart gives you total bytes went through firewall. What you need to know is realtime bytes (or bits) per second graph like the one your ISP provided.

If you are interested, you can generate your own graphs using an SNMP grapher if your router supports SNMP (which most probably does)
To name some of these software, go check these: Cacti, MRTG, PRTG or SolarWinds toolset
All of the named software can store historical information of your usage, in addition you can generate a historical graph of your servers disk usage, CPU usage and so on.
I prefer cacti and MRTG among those.

Commented:
I find it interesting that a majority of your usage is https (secured) web browsing rather than "surfing".  imap only accounts for a small fraction.  So is the vpn service over https?  If so, you might split off your browsing only to find that your VPN users remain nearly saturated.
You've got to determine two things.  
1. How much BW are your VPN users actually using. File transfers? Data sharing?  these can really skew your numbers.
2. Any other "consumer" level options.  Does the local cable company offer "Business" internet via a cable modem?  That will give you quite a bit more BW for little price (with the downside that it's not covered by a service level agreement like a T1), and likely has a much higher upload BW compared to the ADSL.
GorapsI.T. Manager

Author

Commented:
The HTTPS is email traffic.. we are using a hosted offsite solution.  Basically I put a DSL connection I was using for just wireless traffic back onto the local network for internal staff to use for internet access.  T1 connection has not stabilized which I am now currently using for VPN traffic only.  

T1-with-VPN-only.JPG
GorapsI.T. Manager

Author

Commented:
"T1 connection has not stabilized which I am now currently using for VPN  traffic only. " 
  I meant to say T1 connection has NOW stabilized.
GorapsI.T. Manager

Author

Commented:
T1 util report... Major drop once DSL was put into place.



T1-Util-Report-after-DSL-insert.JPG

Commented:
Get a report of DSL utilization too.
GorapsI.T. Manager

Author

Commented:
The ISP is a joke.. waiting for it.

Commented:
They should probably provide real-time reporting for you. Ask them about it.
GorapsI.T. Manager

Author

Commented:
This is all I got from the ISP..
DSL-UTIL.JPG