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High latency with 2 networks attached 1 computer


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#1
strikermed

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I'm having an issue with latency when utilizing my 1GbE network (internet) to access web pages when I have my 10GbE network attached. 

 

Here is my set up.

 

I have my workstation direct attached via 10GbE to my server computer on 192.168.2.#.  My Workstation and my server are attached via 1GbE to a router on 192.168.1.#.  The router is then attached to the modem. 

 

When I start up Firefox or other web browsers I get lag or high latency when I try to load a page.  It will take about 10-20 seconds before it kicks in and loads a page.  This only happens when I initially open a web browser after the workstation has been sitting for a while idle.  Once I start browsing I have snappy load times.  I don't have anything like torrents or anything running that would slow my internet connection.  Other than what ever windows uses in the background, there is no activity on either network. 

 

Does anyone know if there is any issue with having 2 networks simultaneously attached to a single computer?  Could this be an issue with my work station first trying to connect via 10GbE before it tries the 1GbE which has internet access?  If so, is there any way to set the 1GbE connection to be the default selection to prevent this behavior?

 

Thanks for the help!


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#2
RKinner

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Can you open an elevated Command prompt and do:

 

netstat -rn

 

 

That's space - R N

 

Copy the text and paste it into a reply.  If you don't know how to do the above then tell me what operating system you are using so I can give you detailed instructions.

 


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#3
strikermed

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I'll do that when I'm home this evening.  I have windows 10.  I'm assuming I just need to enter that into a command prompt or a powershell session...

 

I'll report back with my findings.


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#4
RKinner

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With Windows 10 you can hit the Windows key + x to bring up a menu.  There are two Command Prompts on the menu.  You want the one that says Command Prompt (Admin)

 

If you don't have the Windows key then you can search for cmd.exe and when it finds it right click and run as administrator.

 

In order to copy the text you need to right lick and hit Mark then start at the upper left of what you want to copy and hold down the left mouse button as you drag it to the bottom right of what you want to copy.  Once it's selected hit Enter to copy it then move to a Reply and Ctrl + v.  Alternatively you can do:

netstat  -rn  >  \junk.txt
notepad  \junk.txt

This will send the info to a file \junk.txt which will then be opened in notepad.

 

 

The main part I care about is the IPv4 Route Table which looks something like this:

 

 
IPv4 Route Table
===========================================================================
Active Routes:
Network Destination        Netmask          Gateway       Interface  Metric
          0.0.0.0          0.0.0.0    192.168.1.254     192.168.1.68     25
        127.0.0.0        255.0.0.0         On-link         127.0.0.1    306
        127.0.0.1  255.255.255.255         On-link         127.0.0.1    306
  127.255.255.255  255.255.255.255         On-link         127.0.0.1    306
      192.168.1.0    255.255.255.0         On-link      192.168.1.68    281
     192.168.1.68  255.255.255.255         On-link      192.168.1.68    281
    192.168.1.255  255.255.255.255         On-link      192.168.1.68    281
        224.0.0.0        240.0.0.0         On-link         127.0.0.1    306
        224.0.0.0        240.0.0.0         On-link      192.168.1.68    281
  255.255.255.255  255.255.255.255         On-link         127.0.0.1    306
  255.255.255.255  255.255.255.255         On-link      192.168.1.68    281
===========================================================================
Persistent Routes:
  None

 

 

Note the first line:
 
0.0.0.0          0.0.0.0    192.168.1.254     192.168.1.68     25
This is how it gets to the Internet.  What I expect has happened is that you have not one but two 0.0.0.0  0.0.0.0 lines.  One for each interface and Windows is confused about which to use.  This is a common error.  Tell me which one  really goes to the Internet.  Does the other one go to any other networks (other than the one it is on)?

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#5
strikermed

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Sorry about the long delay on response, but I ran this command prompt and these are my results.  It doesn't look like that is the issue.  That's the proper route to the internet on my end.

 

 

===========================================================================
Interface List
  7...a0 36 9f 75 44 82 ......Intel® Ethernet Converged Network Adapter X540-T1
  5...74 d0 2b 2b d0 6a ......Intel® 82579V Gigabit Network Connection
  1...........................Software Loopback Interface 1
  2...00 00 00 00 00 00 00 e0 Teredo Tunneling Pseudo-Interface
  6...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter
  3...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter #2
===========================================================================

IPv4 Route Table
===========================================================================
Active Routes:
Network Destination        Netmask          Gateway       Interface  Metric
          0.0.0.0          0.0.0.0      192.168.1.1    192.168.1.106     10
        127.0.0.0        255.0.0.0         On-link         127.0.0.1    306
        127.0.0.1  255.255.255.255         On-link         127.0.0.1    306
  127.255.255.255  255.255.255.255         On-link         127.0.0.1    306
      192.168.1.0    255.255.255.0         On-link     192.168.1.106    266
    192.168.1.106  255.255.255.255         On-link     192.168.1.106    266
    192.168.1.255  255.255.255.255         On-link     192.168.1.106    266
      192.168.2.0    255.255.255.0         On-link       192.168.2.2    261
      192.168.2.2  255.255.255.255         On-link       192.168.2.2    261
    192.168.2.255  255.255.255.255         On-link       192.168.2.2    261
        224.0.0.0        240.0.0.0         On-link         127.0.0.1    306
        224.0.0.0        240.0.0.0         On-link     192.168.1.106    266
        224.0.0.0        240.0.0.0         On-link       192.168.2.2    261
  255.255.255.255  255.255.255.255         On-link         127.0.0.1    306
  255.255.255.255  255.255.255.255         On-link     192.168.1.106    266
  255.255.255.255  255.255.255.255         On-link       192.168.2.2    261
===========================================================================
Persistent Routes:
  None

 


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#6
RKinner

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Doesn't look like the 10GB net is active.  Can you make sure both are connected and do it again.

 

(Going to bed now it's just past midnight here in Florida)


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