Learn how to a build a cloud-first strategyRegister Now

x
  • Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 447
  • Last Modified:

Wireless Network issues

Hello,

I have a complex wireless network. Subnet 2 loses LAN connectivity and release new of the IP address to return online. I have b

192.168.1.1 Base router
192.168.1.x - 10 or so devices on the LAN
192.168.1.2 - Cisco BR350 Transmitter ROOT-BRIDGE

192.168.1.3 - Receiver for SUBNET 2
192.168.1.6 - Router WAN address
192.168.100.x - SUBNET B LAN 15 devicesHEAVY USERS

192.168.1.4 - Receiver for Subnet 3
192.168.1.5 - Router WAN address
192.168.101.x - Subnet C LAN 2-3 devices

192.168.1.246 - Receiver for Subnet 4
192.168.1.8 - Router WAN
192.168.10.x - SUBNET D LAN 2-3 devices

The internet goes down several times a day on subnet 2.
I have to do a release / renew on SUBNET 2 router in order to regain internet access. I am very frustrated. Any thoughts?
0
mrmafioso
Asked:
mrmafioso
  • 14
  • 9
  • 3
  • +1
1 Solution
 
WalkaboutTiggerCommented:
What type of equipment are you using for your routers/WAPs?

Who is the ISP?

I presume you're getting DHCP-assigned IPs from the ISP?
0
 
mrmafiosoAuthor Commented:
Yes.

I just put in Cisco 350 bridges

YES DHCP assigned from ISP
0
 
mrmafiosoAuthor Commented:
Im sorry that was vague,

I have Cisco E2500 router as the main router.

Subnet 2 has a Sonicwall TZ210

Subnet 3 has a cheap Netgear
Subnet 4 has a cheap Netgear.

0
Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 
WalkaboutTiggerCommented:
Are you using non-overlapping channels (1, 6, 11) between the root bridge and sites 2, 3 and 4?  Each of these sites should be on its own channel.

I presume you're using the BR350's to bridge multiple campus buildings.  Is this a valid assumption?  If so, what antennas are you using?

Has this ever worked without disconnects in the past?

When you have to do the release/renew at site 2, is the green wireless light solid or blinking on the BR350?
0
 
mrmafiosoAuthor Commented:
I have 1 SSID called Comcast-FEED. I don't have different channels for the different Bridges.

I have 2 antenna mounted on side of the source house Bridges work in Diversity mode and all other buildings are in line of sight. They all run on channel 11.
0
 
WalkaboutTiggerCommented:
The first thing I would do would be to change the heavy-use path to one of the non-overlapping channels (channel 1 would be my choice to get it as far away from 11 as possible).

I presume you are using the planar, directional antennas and not omni or yagi ones.
0
 
mrmafiosoAuthor Commented:
I feel it is a routing issue because I can't pass through the source router and hit LAN B  from the Internet. But I can connect to LAN B if I am on a computer on LAN A. And run the release renew on the IP address to regain connectivity. It has worked successfully in the past. I am not sure anything has changed internally. Sidenote, I chose "Use least congested channel" on BR350 and it chose 11.
0
 
WalkaboutTiggerCommented:
Can you post sanitized version of your configurations here?
0
 
mrmafiosoAuthor Commented:
I am not sure how export configs from the bridge. Is there a command to do this in the CLI ?
0
 
Darr247Commented:
Since the main difference for subnet 2 seems to be the sonicwall, have you tried temporarily substituting another 'cheap' router for it to see if the problem stops?

If you don't have a spectrum analyzer to check for near-band interference, I would at least setup a laptop with metageek's free inSSIDer and look around for competing WiFi networks. They could be sporadic (e.g. someone bringing their own MiFi unit in a pocket), so you need to have it running, near the subnet 2 bridge, when the internet goes down on subnet 2.

If you want to add a spectrum analyzer to your tool kit, rather than full blown models (which start around $4000 and go up from there), I suggest starting with something especially for WiFi... you can get units that examine only the specific 2.4GHz band and leverage the CPU/display of a laptop to lower the cost significantly. Of the products offered by metageek (http://metageek.net/products/wi-spy/ ), the Wi-Spy 2.4x would be the one I recommend in this instance. I do not work for metageek, but I do have one of their 2.4x units and in my opinion it's well-worth the $199. This problem could be as simple as a leaky microwave oven being used nearby, but you won't be able to 'see' it without a spectrum analyzer.
0
 
mrmafiosoAuthor Commented:
Yes I have. Each home has a seperate internal wireless network. Those networks run on channels 3-6.
Have you seen a case where interference would cause the network to appear normal, be able to ping every device on the parent 192.168.1.x Lan, EXCEPT default gateway?  I look over the logs I see no association errors on the bridge whatsoever.
0
 
WalkaboutTiggerCommented:
One network 2, is the default gateway the SonicWall?

Have you updated the SonicWall to the latest version of the firmware/os?
0
 
mrmafiosoAuthor Commented:
Yes the default gateway for each of the 3 subnetworks is node 254 on their respective subnet. I have updates the firmware to the latest and it still persists. Do you think it could be because the home network is 192.18.1.x where the network that is having all the trouble is 192.168.100.x?
0
 
WalkaboutTiggerCommented:
No, because this would be an issue for the other houses if it was an IP numbering issue.

Unless the SonicWall is needed for some specific functionality at location 2, I would try Darr247's suggestion and try another "cheap" netgear router to see if the problem persists.

Is the bridge the unit you have to do the ip release/renew on or is it the Sonicwall or is it yet another piece of equipment?
0
 
mrmafiosoAuthor Commented:
I had a cheap router in place at first. I replaced a E2000 firewall with this Sonicwall TZ-210 firewall. The unit I have to do the release renew on is the WAN interface of the Sonicwall on LAN B.
0
 
WalkaboutTiggerCommented:
Did the E2000 exhibit the same issue?

What kind of throughput are you seeing through the SonicWall?
0
 
WalkaboutTiggerCommented:
On the SonicWall, if you select the WAN port, what is the DHCP lease duration/expiry date/time?  Does this coincide with the problem being experienced?
0
 
mrmafiosoAuthor Commented:
Yes, it needed to be reset as well. The lower end devices dont have detailed logging, so i was not able to isolate the issue, but the end user  (LAN B) would reset the BR350 receiver and the router at the same time because their receptacle is controlled by a lightswitch.
0
 
mrmafiosoAuthor Commented:
The Lease time assigned by the E2500 is one day. It doesn't make a difference. The behavior is sporadic.
I have tried setting the IP statically to 192.168.1.6  / with the IP address of the recieving bridge being 192.168.1.4. Even set statically, I have to change the IP address at regular intervals.

0
 
rochey2009Commented:
Hi,

Can you ping both of the following addresses when the problem occurs?

192.168.1.3 - Receiver for SUBNET 2
192.168.1.6 - Router WAN address
0
 
Darr247Commented:
> Those networks run on channels 3-6.
Please use only channels 1, 6 and 11. Channel 3 overlaps both channel 1 and channel 6.


Next troubleshooting step should be swapping locations of the Cisco 350 at subnet 2 with one of the other Aironets and see if the problem moves with the bridge.
0
 
mrmafiosoAuthor Commented:
When the issue occurs from LAN B, I can ping the gateway, local bridge, remote bridge and PC's on the subnet, just no remote gateway (LAN A 192.168.1.1) . From LAN A I can see every device and internet access is working. I will change the channels of the bridges to 11 and all the internal wireless devices to channel 1.
0
 
rochey2009Commented:
So you can see every device on LAN B when the problem occurs?
0
 
mrmafiosoAuthor Commented:
From LAN A I can log into the web management port of the firewall for LAN B. I don't have any open ports otherwise.
0
 
mrmafiosoAuthor Commented:
If there were a device on LAN B that happen to have its default address of 192.168.1.x somehow. Would it bring the router down and cause problems like this?
0
 
rochey2009Commented:
Can a device on LAN B ping 192.168.1.3 and 192.168.1.6 when the problem occurs?
0
 
WalkaboutTiggerCommented:
mrmafioso, if a device on LAN B had an address in the 192.168.1.0/24 network, it shouldn't be possible for it to talk to anything, including the bridge or any other workstations on the LAN B.  If it is able to, something else is seriously wrong with the environment.

I think I have a BR350 in my stack of Cisco gear.  I will see what is needed to pull the config off it.
0
 
mrmafiosoAuthor Commented:
After changing the wireless around to local WAP's @ Ch 1.  INfrastructure WAP's @ CH 11. Problems dropped significantly.
0

Featured Post

Concerto's Cloud Advisory Services

Want to avoid the missteps to gaining all the benefits of the cloud? Learn more about the different assessment options from our Cloud Advisory team.

  • 14
  • 9
  • 3
  • +1
Tackle projects and never again get stuck behind a technical roadblock.
Join Now