2

I have a problem with Loop-Protect on a HP 2510G Switch.

I configured Loop-Protect with loop-protect all receiver-action send-disable and set transmit-interval 1 and disable-timer 30.

I tested my setup:
Client 1 at Port 1 ping Client 2 at Port 2.
Then I directly connected Ports 3 and 4 with a patch-cable.
The most times the Loop was detectet and Port 3 and 4 go down.
2 of 14 Loops are never detected and the Network will be flooded.

What could be the error?

Here is the output of show loop-protect:

ProCurve Switch 2510G-48# show loop-protect 

 Status and Counters - Loop Protection Information

 Transmit Interval (sec)  : 1           
 Port Disable Timer (sec) : 30          
 Loop Detected Trap       : Disabled    


       Loop        Loop      Loop       Time             Rx           Port   
  Port Protection  Detected  Count      Since Last Loop  Action       Status  
  ---- ----------- --------- ---------- ---------------- ------------ --------
  1    Yes         No        0                           send-disable Down    
  2    Yes         No        0                           send-disable Down    
  3    Yes         No        0                           send-disable Down    
  4    Yes         No        0                           send-disable Down    
  5    Yes         No        0                           send-disable Down    
  6    Yes         No        0                           send-disable Down    
  7    Yes         No        0                           send-disable Down    
  8    Yes         No        0                           send-disable Down    
  9    Yes         No        0                           send-disable Down    
  10   Yes         No        0                           send-disable Down    
  11   Yes         No        0                           send-disable Down    
  12   Yes         No        0                           send-disable Down    
  13   Yes         No        0                           send-disable Down    
  14   Yes         No        0                           send-disable Down    
  15   Yes         No        0                           send-disable Down    
  16   Yes         No        0                           send-disable Down    
  17   Yes         No        0                           send-disable Down    
  18   Yes         No        0                           send-disable Down    
  19   Yes         No        0                           send-disable Down    
  20   Yes         No        0                           send-disable Down    
  21   Yes         No        0                           send-disable Down    
  22   Yes         No        0                           send-disable Down    
  23   Yes         No        0                           send-disable Down    
  24   Yes         No        0                           send-disable Down    
  25   Yes         No        0                           send-disable Down    
  26   Yes         No        0                           send-disable Down    
  27   Yes         No        0                           send-disable Down    
  28   Yes         No        0                           send-disable Down    
  29   Yes         No        0                           send-disable Down    
  30   Yes         No        0                           send-disable Down    
  31   Yes         No        0                           send-disable Down    
  32   Yes         No        0                           send-disable Down    
  33   Yes         No        0                           send-disable Down    
  34   Yes         No        0                           send-disable Down    
  35   Yes         No        0                           send-disable Down    
  36   Yes         No        0                           send-disable Down    
  37   Yes         No        0                           send-disable Down    
  38   Yes         No        0                           send-disable Down    
  39   Yes         No        0                           send-disable Down    
  40   Yes         No        0                           send-disable Down    
  41   Yes         No        0                           send-disable Down    
  42   Yes         No        0                           send-disable Down    
  43   Yes         No        0                           send-disable Down    
  44   Yes         No        0                           send-disable Down    
  45   Yes         No        0                           send-disable Down    
  46   Yes         No        0                           send-disable Down    
  47   Yes         No        0                           send-disable Down    
  48   Yes         No        0                           send-disable Down    
ProCurve Switch 2510G-48# 
  • 4
    I would personally use loop-protect in addition to spanning tree, rather than instead of it; with that the forwarding delay will protect your network. With loop-protect you are reduced to damage limitation after the fact. If you set a broadcast limit that might stop the ports saturating with junk and let the loop-protect packets through - I've not tried that though. – richardb Aug 15 '14 at 9:47
  • Spanning Tree is not an option. The Network contains Switches from different Vendors and Spanning Tree is not compatible enough. I will test your Broadcast Limit Idea. – CookieCrash Aug 15 '14 at 10:20
  • @CookieCrash Amazing ... – Xavier Lucas Oct 18 '14 at 12:36
6

Spanning Tree is not an option. The Network contains Switches from different Vendors and Spanning Tree is not compatible enough.

what year is it?

If your switches don't at least support MST which has been around for almost 10 years now, replace that garbage. Disabling spanning tree is the most incorrect solution to the problem.

2

I had solved the Problem by follow the hint from richardb.
How i have done this:

  1. Set Broadcast Limit to 30%
  2. Setting up loop-protect for all Ports

All loops are detected from now.

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