Want to win a PS4? Go Premium and enter to win our High-Tech Treats giveaway. Enter to Win

x
?
Solved

NetGear switch takes multiple locations down when power loss

Posted on 2014-03-25
5
Medium Priority
?
388 Views
Last Modified: 2014-03-27
I have a very small network using older NetGear FSM726 switches.  Very basic.  Whenever a specific location loses power, it causes other buildings to lose their network resources.  At a central location there are 2 NetGear switches with the gigabit fiber modules (2 each). Each of the fiber ports go to location 1 (Admin),2 (Streets),3 (Parks),4 (Golf). 1 & 2 are on the same switch. 3 and 4 are on the other switch and the two switches are uplinked with cable.  When #2 switch goes down, Locations 3, 4 and the central location cannot get to 1-Admin for mail, internet etc.  There is nothing programmed on the switch.  It is just one big switched environment connected by fiber.  What could possibly explain why one switch dropping can affect the rest?  Is there a setting on the switch?  It's like the chain is broken.  No vlans, no extra confg.
0
Comment
Question by:cobmo
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
  • 2
5 Comments
 
LVL 39

Expert Comment

by:Aaron Tomosky
ID: 39956707
A -> 1 (admin)
^  -> 2 (streets)
|
|
B -> 3 (parks)
   -> 4 (golf)

do I have this right? I assume A->B uses the gigabit port
so when 2 goes down:3, 4, and B can't get to A or 1 right?

sounds like the fiber port may be shared with the gigabit or something so if the fiber has a problem, it takes out the gigabit. I don't know much about fiber, but the manual mentions specs like crossover, do you know if those guidelines are followed?
0
 

Author Comment

by:cobmo
ID: 39956851
Yes
Switch A & B are in the same location using GBIC from the central location to the edge locations. 2 Netgear switches with 2 GBIS ports each for each location located at the central site where all the fiber converges.

When the Switch located at the Streets goes down, then Switch B cant get thru Switch A to get to resources from the central location.

Im investigating Spanning Tree settings.  The Streets switch had all ENABLED on the Spanning Tree menu and the central location switch where the gbic for Streets is plugged into did as well but no other switch on the network has Spanning Tree enabled.

Broadcast Storm?
0
 
LVL 39

Expert Comment

by:Aaron Tomosky
ID: 39959731
I don't think you need spanning tree at all for this setup. If you aren't using it, off is best.
0
 

Author Comment

by:cobmo
ID: 39959938
Switch A was rebooted and things calmed down.  I see the spanning tree information out there on the web says do this do that but I dont really have a definite clarification on what it should be.  Should this be something configured on all ports for user devices and not the gbic ports, vice versa, or definitely not at all?
0
 
LVL 39

Accepted Solution

by:
Aaron Tomosky earned 2000 total points
ID: 39960042
Spanning tree allows you to connect more than one cable to the same place. Without stp it's a loop and everything goes down. The alternative is a LAG. I have never personally needed stp so I always turn it off everywhere.
0

Featured Post

Ready for your healthcare security check-up?

In the past few years, healthcare organizations have become a prime target for advanced attacks. Does your organization have what it needs to defend itself? Schedule your healthcare security check-up today and download our free Healthcare Security Resource Kit today!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Creating an OSPF network that automatically (dynamically) reroutes network traffic over other connections to prevent network downtime.
Use of TCL script on Cisco devices:  - create file and merge it with running configuration to apply configuration changes
NetCrunch network monitor is a highly extensive platform for network monitoring and alert generation. In this video you'll see a live demo of NetCrunch with most notable features explained in a walk-through manner. You'll also get to know the philos…
Monitoring a network: why having a policy is the best policy? Michael Kulchisky, MCSE, MCSA, MCP, VTSP, VSP, CCSP outlines the enormous benefits of having a policy-based approach when monitoring medium and large networks. Software utilized in this v…
Suggested Courses

597 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question