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07-19-2017 12:34 AM
07-19-2017 12:34 AM
trying to trace network down (collisions or packet drops)
hi experts
Here's my topology: an HP core Switch 8206zl and an HP ProCurve switch 2920... We have about 30 Procurve ,aruba each switch connected direct to core switch by fiber
3 Vlans ) Data,Voice , MGM
Only tow switches connected together cascaded
we don't have any load balancer in the network
I found some departments has small switch 8port TP Link ,PCs department connected to this switch and the switch connected to main switch in the floor
All thing is ok
Yesterday we found all the network down for 3 minutes then retuned well as before
When I check all switch log I found in 5 switch : A large number of collisions or packet drops have occurred on port.
And when check core witch there no log for this issue
Please any one help how to trace this issue to avoid occurs again and what is the reasons for this issue
thanks
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12-11-2017 08:21 PM
12-11-2017 08:21 PM
Re: trying to trace network down (collisions or packet drops)
HI Dear , When your Network was down , that time did you check client were getting proper IP Address? Secondly I suspect there was loop created in your network. check the following things.
Check SPanning Tree In your swithces. As you know Spanning tree is disable by default in HP Switches.
And I have also suspect your switch 8port TP Link Maybe loop was created form there.