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тАО12-22-2004 02:31 AM
тАО12-22-2004 02:31 AM
Problems with Monitoring Port Settings
So right now I am trying to monitor 4 servers and one other port.
2 of the 4 servers have multiple NICs on them.
If I only monitor one of the NICs on each server, so a total of 5 ports I do not have any dropped packets.
If I monitor more than one of the NICs attached to the same server I have two things happen.
First I have had a message pop up warning that monitoring multiple ports may cause the same broadcast messages appear on the monitoring port. Then when I am monitoring the port with a packet sniffer I get A LOT of dropped packets maybe about 38%.
Do you have any ideas as to why I am running into this problem? Is it something to do with Automatic Broadcast Control?
Any ideas on what I should try to solve this problem?
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тАО12-22-2004 03:40 AM
тАО12-22-2004 03:40 AM
Re: Problems with Monitoring Port Settings
Or do you get drops when you add trunk members to the other five you are monitoring?
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тАО12-22-2004 04:17 AM
тАО12-22-2004 04:17 AM
Re: Problems with Monitoring Port Settings
I get the drops when I add more than one interface per server. So all is fine with the 5 ports. But if I add another interface from one of the servers it gives me dropped packets (monitoring 6 ports).
I can add other ports and not have any problems, only when I start monitoring ones that are hooked up to the same machine do I get errors.
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тАО12-22-2004 06:08 AM
тАО12-22-2004 06:08 AM
Re: Problems with Monitoring Port Settings
I don't know if Automatic Broadcast Control is in effect on a Monitor port but it would be easy to turn it off and see if that made a difference.
Ron
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тАО12-22-2004 07:53 AM
тАО12-22-2004 07:53 AM
Re: Problems with Monitoring Port Settings
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тАО01-13-2005 10:25 PM
тАО01-13-2005 10:25 PM
Re: Problems with Monitoring Port Settings
Exactly *where* do you get drops?
Is it on the switch itself or on the device that is doing the monitoring?
Also, you say 20% load each. Is that the ports you are monitoring? 5x20%=100% so packetrate could be a problem.