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Standard User Oldseadog29
(newbie) Thu 26-Apr-12 10:59:54
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Network Monitoring


[link to this post]
 
I run a home network and would like to be able to monitor all internet usage traffic which runs through the 3Com hub.
Is this possible?
Any advice would be gratefully recieved.
Administrator MrSaffron
(staff) Thu 26-Apr-12 11:05:30
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Re: Network Monitoring


[re: Oldseadog29] [link to this post]
 
If the 3Com device has an ethernet switch then you are left with using just SNMP to monitor the traffic levels.

Ethernet switches don't rebroadcast data from other machines to the other sockets, unless the traffic is aimed at that machine. We did toy with a beta bit of software that could sniff, but this only worked with Ethernet hubs, which do rebroadcast and are almost impossible to buy now.

Andrew Ferguson, andrew@thinkbroadband.com
www.thinkbroadband.com - formerly known as ADSLguide.org.uk
The author of the above post is a thinkbroadband staff member. It may not constitute an official statement on behalf of thinkbroadband.
Standard User greenglide
(member) Thu 26-Apr-12 12:34:36
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Re: Network Monitoring


[re: MrSaffron] [link to this post]
 
The OP was asking about Internet Traffic all of which is available to the router.

It still wouldnt be simple to monitor the traffic as the router would have to analyse it because, as you say, the traffic wouldnt come out of the LAN ports because of the switching.

Could always use an old PC to do the routing using one of the Linux packages and use the current router in bridge route?

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Standard User RobertoS
(sensei) Thu 26-Apr-12 13:49:50
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Re: Network Monitoring


[re: greenglide] [link to this post]
 
In reply to a post by greenglide:
The OP was asking about Internet Traffic all of which is available to the router.
Are you sure about that? Or more specifically, are you sure it can be retrieved from all routers?

What about routers that report packet counts?

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Standard User machanch
(newbie) Fri 27-Apr-12 13:38:04
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Re: Network Monitoring


[re: RobertoS] [link to this post]
 
It should be possible on most modern ADSL routers. I have a Netgear DGN2200 ADSL router and it has a build-in traffic meter, which logs the traffic thus


Internet Traffic Statistics
Start Date/Time: Saturday, 31 Mar 2012 23:00
Current Date/Time: Friday, 27 Apr 2012 13:19
Traffic Volume Left: 0 B

Period Connection Time Traffic Volume (Mbytes)
(hh:mm) Upload/Avg Download/Avg Total/Avg

Today 13:15 13.30 479.77 493.07
Yesterday 24:00 5.72 267.37 273.09
This week 157:15 267.91 /38.27 6569 /938.54 6837 /976.81
This month 634:12 7392 /246.41 81809 /2726 89201 /2973
Last month 693:59 16394 /546.49 104946 /3498 121341 /4044

My only issue is that I do not know how to access this data automatically, with a network tool. So I login to the router get the info and enter it into a spread sheet.
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