01-26-2007 09:21 AM - edited 03-05-2019 02:01 PM
Hi , i've recently got a 2900XL which is running very slow. The network traffic passing through is at very low speeds (2 mbps). I've tried to use a CNET switch instead of the 2900XL and the traffic is about 5 mbps. So , does anyone know how to configure this switch so that the network traffic will get a couple of mbps faster ?
Solved! Go to Solution.
01-26-2007 01:08 PM
sounds like you should leave the switchports as auto for both speed and duplex .
01-26-2007 09:49 AM
You may want to check for duplex mis-matches between the 2900XL and the devices attached to it ... just an idea.
Dave
01-26-2007 09:55 AM
Dave is correct check for that on all your ports . Any ports running full duplex should not be seeing any errors . Clear the counters and see if any ports are rapidly increasing errors .
01-26-2007 10:28 AM
Okay , cleared the counters and transfered a 244 mb file. No errors. I checked the duplex and all ports has full duplex. The CPU usage is:
CPU utilization for five seconds: 27%/5%; one minute: 27%; five minutes: 27%
Also good to know is that the console shows this everytime i boot up that switch:
C2900XL POST FAILURE: front-end post: FastEthernet0/1:
C2900XL POST FAILURE: looped-back packet not received
C2900XL POST FAILURE: front-end post: FastEthernet0/13:
C2900XL POST FAILURE: looped-back packet not received
C2900XL POST FAILURE: front-end post: FastEthernet0/14:
C2900XL POST FAILURE: looped-back packet not received
C2900XL POST FAILURE: front-end post: FastEthernet0/15:
C2900XL POST FAILURE: looped-back packet not received
C2900XL POST FAILURE: front-end post: FastEthernet0/16:
C2900XL POST FAILURE: looped-back packet not received
FOUND an unknown transceiver on port 13
00:00:14: %LINK-4-ERROR: is experiencing errors
FOUND an unknown transceiver on port 14
FOUND an unknown transceiver on port 15
FOUND an unknown transceiver on port 16
The ports 13,14,15,16 are not working , got no link when using them. But the others are working. I can post the config if anyone wants.
01-26-2007 11:05 AM
Its failing POST you need a new switch .
01-26-2007 11:20 AM
Yeah , i know but the switch is still working.
I can get a link on other ports but 1,13,14,15,16.
The ports 2,3,4,5,6,7,8,9,10,11,12,17,18,19,20,21,22 is working perfectly. The problem is that the switch is running slower than my other switches , which has nothing to do with this switch.
01-26-2007 11:40 AM
You say the ports are set as full duplex you must verify the attached devices are also hardcoded to full duplex if they are set as auto there is a speed duplex mismatch , if your cnet switch was set as auto that would indicate that the pc client nics are auto and your switchports are hardcoded which is incorrect , try setting your ports as auto . Set interfaces
as speed auto , duplex auto .
01-26-2007 12:02 PM
Okay , tested to hardcode the switchports and auto-code them and everything goes faster when i auto-code them. I have tested Everything with this config:
1.Auto-Duplex - Auto-Speed
2.100-Coded duplex - Auto-Speed
01-26-2007 01:08 PM
sounds like you should leave the switchports as auto for both speed and duplex .
01-26-2007 02:06 PM
Maybe...i will soon test a bit more with the bandwidth....I will do that tomorrow.
01-27-2007 05:00 AM
I have tested the bandwidth with this configuration:
1.Disabled Spanning Tree on all VLANs.
2.Disabled CGMP
3.Duplex Auto on all ports
4.Highest bandwidth set on VLAN 10
5.Disabled CDP
6.VTP mode Transparent
7.Management VLAN: 1
8.Assigned IP Address 192.168.1.83 to VLAN 1
9.Assigned IP Address 192.168.2.83 to VLAN 10
Note: VLAN1 is the management VLAN and VLAN 10 is the "network" VLAN. All Ports are assigned to VLAN10
With this configuration , no bandwidth is lost. I even got 13.4 MB/S as the top speed!
The speed were even better when i tried to shutdown vlan 1
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide