Internet Conectivity

Hi Guys

We have a 30MPS Fibre Optic Connection, with a Managed Cisco Switch (BT)

The Ethernet Coming out of the Cisco then goes into a HP Procurve Switch, this is to Split the Fibre Optic off to our 3 Different Firewalls

The issue that we are having is maybe once or Twice a Day we loose Internet Conectivity, the Times Vary and this has only just started to Happen.

To solve the issue I simply Unplug the Ethernet in the Procurve Coming from the Cisco then plug it back in and Voila it starts working again (until the Next Time)

I do not know where to start The Procurve has no mirroring function on it and I am stumped as to what the issue might be?
pepps11976Asked:
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JohnBusiness Consultant (Owner)Commented:
Optic Connection, with a Managed Cisco Switch (BT)  <-- Is this a Router, or performing the function of a Router?

To solve the issue I simply Unplug the Ethernet in the Procurve Coming from the Cisco then plug it

Do you have enough appropriate ports to try different ports?
More importantly, can you try an alternate switch?
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rindiCommented:
Make sure all your devices have the current firmware installed, and if they don't upgrade them.
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pepps11976Author Commented:
The Cisco is a Router Managed Supplied by BT

I will try other Ports and post back
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JohnBusiness Consultant (Owner)Commented:
You can also ask BT to replace the Router as either device could possibly cause intermittent connectivity.
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pepps11976Author Commented:
Ok I Think I may Know what is causing this but do not know how to stop it

The Ethernet from the Cisco Goes into a HP Procurve 2524 from there I have the following

Port 1 Going to a Firewall
Port 2 going to Another HP Procurve 2524
Port3 going to another Switch

could this be causing the issue the fact that the 2 Procurves are linked
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JohnBusiness Consultant (Owner)Commented:
There is no reason why you cannot link switches this way.

Make sure switches are using autosense ports. HP Procurve has autosense ports, but check "switch"
Upgrade firmware as suggested earlier.
Substitute with alternate switch as suggested.
Check with only one switch in the loop.
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pepps11976Author Commented:
They Are Using Auto Sense but have just read best to select 100 FDP on CISCO connected ports so I will give that a try
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Dirk MareSystems Engineer (Acting IT Manager)Commented:
It could also be a routing issue. I had similar issue not to long ago and I never removed the default route of our old router. Had two default routes.

look for 0.0.0.0 on your firewall and make sure that all default routes are pointing to the new gateway IP.

DirkMare
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