12 Replies Latest reply on Jul 19, 2013 8:42 AM by Goliath

[Solved] Monitoring Multiple units in a Cisco 3750 stack of switches?

MFA Nov 18, 2009 5:06 AM

I've have a problem monitoring my Cisco Catalyst 3750 switch stacks.

The problem is that all switches in the stack share the same ip management address, so if one switch in the stack fails, the management address will still be alive.
If i monitor all ports in the stack, then i'll see that 12, 24 or 48 port are gone down, but if i only monitor my uplink ports then i'll see nothing at all, except if my uplink port are on the switch that fails.

I can log on the stack and use following command:

sw-37xx-stack#sh switch stack-ports

Switch #    Port 1       Port 2
--------    ------       ------
    2          Down          Ok
    3           Ok           Ok
    4           Ok           Ok
    5           Ok          Down

This shows me that there is something wrong with the stack-ring, otherwise it should be ok all over.

Does anybody know if it is possible to get this info with snmp?

Re: [Solved] Monitoring Multiple units in a Cisco 3750 stack of switches?

ecornwell Nov 18, 2009 8:36 AM (in response to MFA)

You should be able to monitor the Stack Ports in Orion and alert if they go down. That's what we're planning on doing.
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- Re: [Solved] Monitoring Multiple units in a Cisco 3750 stack of switches?
  
  Andy McBride Nov 18, 2009 9:15 AM (in response to ecornwell)
  
  Also see this thread Cisco 3750 Stackwise MIB/Poller
  
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  - Re: [Solved] Monitoring Multiple units in a Cisco 3750 stack of switches?
    
    MFA Nov 19, 2009 3:06 AM (in response to Andy McBride)
    
    Thanks for the replys.
    How do you monitor the stackports? If i make a "list resources" on my stacks it looks like the attached picture. I can't see the stackports.
    
    Stack.jpg 77.6 KB
    
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    - Re: [Solved] Monitoring Multiple units in a Cisco 3750 stack of switches?
      
      MFA Nov 19, 2009 6:52 AM (in response to MFA)
      
      Solved!
      An IOS upgrade made stack-port monitoring possible. Thanks!
      
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      - Re: [Solved] Monitoring Multiple units in a Cisco 3750 stack of switches?
        
        Andy McBride Nov 19, 2009 11:47 AM (in response to MFA)
        
        What level were you on and what did you upgrade to?
        
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        Re: [Solved] Monitoring Multiple units in a Cisco 3750 stack of switches?
        
        MFA Nov 20, 2009 7:15 AM (in response to Andy McBride)
        
        From IOS 12.2(25)SED1 to 12.2(52)SE (newest version).
        Beware i have only done my test in my LAP and testet the Solarwinds functions. I have not done a properly test of the IOS.
        
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        Re: [Solved] Monitoring Multiple units in a Cisco 3750 stack of switches?
        
        Andy McBride Nov 20, 2009 9:28 AM (in response to MFA)
        
        Please let us know when the final testing is done.
        Thanks!
        
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Re: [Solved] Monitoring Multiple units in a Cisco 3750 stack of switches?

ds2acrvet Mar 5, 2010 8:38 AM (in response to MFA)

I am having the opposite problem. I could monitor my stackports in version 12.2.25, but I upgrade to 12.2.52 and now the stackports are no longer showing.
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- Re: [Solved] Monitoring Multiple units in a Cisco 3750 stack of switches?
  
  abeeson Jul 19, 2013 12:29 AM (in response to ds2acrvet)
  
  We have this 12.2.25.SEB2 running on a lot of ours, this doesnt work, then we have 12.2.25.SEE3 and that does have it.
  
  Any version i have here later than 12.2.25 seems to have it as well, including 12.2.52.SE, if you dont have it working on 12.2.52 i'd be interested which train it is....
  
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Re: [Solved] Monitoring Multiple units in a Cisco 3750 stack of switches?

Goliath Jul 19, 2013 3:28 AM (in response to MFA)

Hi all,

I took a slightly different approach to this: I created a custom interface property (called StackPort funnily enough) and assigned this to all my stackport interfaces. Then I created an alert to fire an email whenever an interface with this custom property changes status to down. It's simple but works well.

Regards,

John
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- Re: [Solved] Monitoring Multiple units in a Cisco 3750 stack of switches?
  
  deverts Jul 19, 2013 7:22 AM (in response to Goliath)
  
  John,
  
  Excellent suggestion! And I think I'm going to change the way I'm doing it (as described above) to your method. It just seems a little cleaner to me.
  
  D
  
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  - Re: [Solved] Monitoring Multiple units in a Cisco 3750 stack of switches?
    
    Goliath Jul 19, 2013 8:42 AM (in response to deverts)
    
    Thanks D. To be honest i use a similar approach for Etherchannel links: create a custom interface property, apply to each member interface of an Etherchannel and you instantly know when one link of the channel has gone down (not always obvious if the other member links stay up no problem).
    
    Regards,
    John
    
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