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Network issue on subnet

Posted on 2014-01-13
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Last Modified: 2014-01-18
I have a device that has 2 ports. 1 port I have on VLAN 41 with ip address of 10.41.105.15 255.255.0.0 and port #2 is on VLAN 42 10.42.105.15 255.255.0.0 gateways are 10.41.0.254 and 10.42.0.254 respectively. They are plugged into a CISCO 2950 VLANs configured on ports and upstream is trunked to another switch and trunked upstream to another switch. that is routing. I can ping both IP address and can access http://10.42.105.15 on its web interface I can not access the other one http://10.41.10.15.
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Question by:rayburnelectric
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Expert Comment

by:Akinsd
ID: 39776699
Let's do a quick elimination troubleshooting.

Try swapping the connections if possible,
Unplug the device 10.42.105.15
take the 10.41.10.15 device, change its ip to 10.42.105.15 and plug it to the working port.
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Expert Comment

by:Ken Boone
ID: 39776700
The problem you have is that a single device should not have 2 default gateways.  A default gateway is a default gateway - singular.  So since you have two configured one of them is taking priority.  Apparently the 10.42.105.15 is taking priority.

You need to remove one of the default gateways.  If you remove the default gateway from port #1 then you will need to add static routes on that device for any of the networks port #1 should be talking to.  Otherwise all traffic directed to port 1 will exit the box on port 2.

What is the purpose for having 2 ports in 2 different vlans?
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Author Comment

by:rayburnelectric
ID: 39776713
They are separate devices and network connections. Its not like a computer where you set static routes. Its 2 sides of a device. Neither one of them know the other exists. Not like a computer.
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Author Comment

by:rayburnelectric
ID: 39776717
The device has a Billing side and a meter side. a server polls one and another polls the other side.
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Expert Comment

by:Akinsd
ID: 39776728
You may need to check with the manufacturer of the device
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Expert Comment

by:Ken Boone
ID: 39776731
Okay.. that makes sense.  Decide which one needs to be the default gateway.   If either interface needs to access the internet make that the default gateway and remove the other default gateway.  If neither needs access to the internet, then which ever interface is talking to the most networks should have the default gateway configured.  Then add static routes going out the other interface to reach whatever networks the other interface needs to reach.
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Expert Comment

by:Ken Boone
ID: 39776761
Okay just saw this post:

They are separate devices and network connections. Its not like a computer where you set static routes. Its 2 sides of a device. Neither one of them know the other exists. Not like a computer.

Didn't see that - your initial post made it sound like a single device with 2 ports.
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Accepted Solution

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rayburnelectric earned 0 total points
ID: 39776765
I figured it out.. I hooked into a dumb switch and programmed ip into my laptop. I got to the issue device and the subnet and gateway both had missing digits. The software that changes the IP apparently didn't send the entire command. Thank you. All fixed.
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Expert Comment

by:Ken Boone
ID: 39776768
If they are truly separate entities then there is most likely a configuration problem or maybe the web interface on the other one uses a unique port or something like that.
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Author Closing Comment

by:rayburnelectric
ID: 39790456
See above. I was able to fix myself.
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