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 Cisco 2950 - Very Low through put - WHY?
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Our config is like so: - Cisco 3550 - does interVlan Routing Cisco 2950T-24 - has Vlans assigned to particular ports Now we have two racks (servers inside) that are both on Vlan 2. The two uplink ports have been assigned to VLAN2. Now when we do backups (rack 1 to rack 2), the through put according to our MRTG graphs is like only 30Mbps. We used to be getting about 90Mbps when we were using a Netgear switch which was very simple layer 2 device. Now our backups are taking so long. Can anybody help please? Anything would be much appreciated. Cheers TechTryer
<-- (:All we can do is do our Best:) --> |
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ADB100 (TechnicalUser) |
6 Oct 03 6:27 |
Check speed & duplex settings first; make sure you are either forcing both on the switch ports and on the servers or both are set to auto-negotiate. After that check what IOS version you are running (latest is 12.1(14)EA1a), check on CCO whether there are any caveats to the version you are running.
Andy |
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Thanks mate for your reply, We have set all the ports to 100MB at full duplex. The IOS we arre running is 12.1(13)EA1a which was the version that the switch was shipped with. Will check on the CCO for any caveats. Cheers TechTryer
<-- (:All we can do is do our Best:) --> |
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ADB100 (TechnicalUser) |
6 Oct 03 16:26 |
You say you have configured all the ports for 100Mb & Full Duplex - are your servers/pcs all hard-coded as well? If they are Intel NICs (or Compaq & IBM derivatives) you usually get a control panel applet for setup statistics. Otherwise this could be where your problem is.
Andy |
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When we changed the switches over, we didn't touch the servers, so i am not sure why this would be the problem. It worked fine with the old settings when we were using the old netgear ones. Cheers TechTryer
<-- (:All we can do is do our Best:) --> |
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As ADB100 said, you need to verify that the NIC settings and the switchport settings match.
The Netgear switch was probably set to autonegotiate, and so where your server. Then you set your Cisco switch to 100-Full, the Server's NIC will try to autonegotiate and fail because it's turned off on the Cisco. Then the NIC will put itself into half-duplex mode, and get send/receive errors with the switch that is set for full-duplex. |
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