Re: Catalyst 2950 CRC Errors [7:51419]
I haven't tried disabling pwrmngmt yet. I'll give it a shot and post the results. Thanks, Dain. ""Frank Jimenez"" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > Might want to review this: > > http://www.cisco.com/warp/public/473/46.html > > Power management was causing a bunch of issues at one of my customer's > sites. Might want to disable it and see if it helps any. > > Frank Jimenez, CCIE #5738 > [EMAIL PROTECTED] > > -Original Message- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of > Dain Deutschman > Sent: Wednesday, August 14, 2002 10:26 PM > To: [EMAIL PROTECTED] > Subject: Re: Catalyst 2950 CRC Errors [7:51419] > > > Also...I have tested the wiring(basic tester...no NEXT/FEXT or other > factors...but lengths of cable are under 50ft) and replaced patch > cables...still no luck. Dain. > > ""Dain Deutschman"" wrote in message > [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > > Hello Everyone, > > > > I have a Cat2950 in a small office throwing up thousands of CRCs, > > input errors and several runts on the port connected to the server. > > Clients are getting disconnected and database on server is constantly > > having to be repaired. The errors always follow the server no matter > > which port I move > it > > to. Have replaced NIC in server and a few key Wkst. Have also updated > > the NIC drivers. ( Win2000 w/3C905C-TX-M Nics ). I have forced speed > > and > duplex > > settings and disabled spanning-tree. I'm suspecting dirty power...but > > it > is > > connected to a UPS ( that only has limited EMI/RFI Filtering ). I > > connect > a > > 3Com unmanaged 8 port switch to the key clients and the server...no > > more problems. Any ideas?!? It's driving me nuts! Thanks in advance... > > -- > > Dain Deutschman > > CNA, MCP, CCNA > > Data Communications Manager > > New Star Sales and Service, Inc. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=51556&t=51419 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: Catalyst 2950 CRC Errors [7:51419]
Might want to review this: http://www.cisco.com/warp/public/473/46.html Power management was causing a bunch of issues at one of my customer's sites. Might want to disable it and see if it helps any. Frank Jimenez, CCIE #5738 [EMAIL PROTECTED] -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of Dain Deutschman Sent: Wednesday, August 14, 2002 10:26 PM To: [EMAIL PROTECTED] Subject: Re: Catalyst 2950 CRC Errors [7:51419] Also...I have tested the wiring(basic tester...no NEXT/FEXT or other factors...but lengths of cable are under 50ft) and replaced patch cables...still no luck. Dain. ""Dain Deutschman"" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > Hello Everyone, > > I have a Cat2950 in a small office throwing up thousands of CRCs, > input errors and several runts on the port connected to the server. > Clients are getting disconnected and database on server is constantly > having to be repaired. The errors always follow the server no matter > which port I move it > to. Have replaced NIC in server and a few key Wkst. Have also updated > the NIC drivers. ( Win2000 w/3C905C-TX-M Nics ). I have forced speed > and duplex > settings and disabled spanning-tree. I'm suspecting dirty power...but > it is > connected to a UPS ( that only has limited EMI/RFI Filtering ). I > connect a > 3Com unmanaged 8 port switch to the key clients and the server...no > more problems. Any ideas?!? It's driving me nuts! Thanks in advance... > -- > Dain Deutschman > CNA, MCP, CCNA > Data Communications Manager > New Star Sales and Service, Inc. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=51555&t=51419 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Catalyst 2950 CRC Errors [7:51419]
John Neiberger wrote: > > We've had nothing but bad luck with the 3C905C NICs. We've purchased a > *bunch* of low-end Dell PCs that have that NIC and they tend to get the > blue screen of death and then reboot if they're connected to Cisco > switches, especially when STP is turned on. Very odd behavior and we > haven't found a solution yet. We'd better come up with something fast > because we're getting more of those pieces of junk soon. > Here's an old Cat 5000 bug report that I saved: BugID: CSCdt68700 Title: Switch reports FCS, Alignment, Runts when 3C905C connected at FD Feature: counters Version: 5.5(6) Integrated: Severity: 5 State: C Release Notes: Under normal traffic conditions, a 100 Megabit, Full-duplex connection between any Cisco Catalyst Switch and a 3Com 3C905C will result in Layer 2 errors. The Catalyst Switch will report these Layer 2 errors as FCS, Alignment and Runt Packets. Troubleshoot this issue by reviewing the below guidelines and documentation. 1. Verify that both the 3Com 3C905C and Catalyst Switch are both set for auto-negotiate or both are manually set for 100 MB, Full-Duplex. A duplex mismatch will cause a higher rate of Layer 2 (physical) layer errored frames. 2. Load the lastest 3Com 3C905C driver available from www.3com.com 3. Load the diagnostic utility available with the lastest 3Com 3C905C driver. update.exe /diag) 4. Connect 2 test workstations with 3Com 3C905Cs back-to-back using a crossover cable. 5. Test Connectivity initiating a large file transfer between the workstations and noting the following counters with the 3Com Diag Utility. This test, the back-to-back between the PCs with 3C905C(s), will give a benchmark for performance and physical layer errors. According to the 3Com documentation, the details of the following counters are significant: Receive Overruns: Receive Overrun is the number of lost packets that cannot be stored in the receive buffer because the PC''s buffer is already full. Carrier Sense Lost: Carrier Sense Lost is the number of packets transmitted with a carrier sense loss. This normally occurs as a result of collisions. Transmit Underrun: Transmit underrun is the number of times a packets was transmitted without adequate data by the NIC. In respective the Catalyst Switch Counters, a packet transferred that results in the Carrier Sense Lost or Transmit Underrun incrementing on the 3Com NIC will cause at least one of the following counters to increase on the Switch: Alignment, FCS, CRC, Input Errors, Receive Errors, and/or Runts. Noting the errors and performance back-to-back between 2 PCs with the 3C905C NIC will give a minimum baseline for the number of errors reported by the switch and a generally baseline for performance. 6. Repeat step 5 with the PCs connected to the switch and baseline the number of errors to the errors recorded in Step 5. Expect a higher number of errors when the workstation is connected to the network as there will be higher load of traffic including multicast, unicast-flood, and broadcast traffic. Note: It has been noted that increasing CPU/BUS Speed on the workstation increases the number of Transmit Underrun packets recorded on the NIC and Runt Packets on the Catalyst Switches. In conclusion, this issue is not a Switch specific issue nor an issue with compatability. Please contact 3Com Tech Support for resolution. - Marty Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=51543&t=51419 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Catalyst 2950 CRC Errors [7:51419]
We've had nothing but bad luck with the 3C905C NICs. We've purchased a *bunch* of low-end Dell PCs that have that NIC and they tend to get the blue screen of death and then reboot if they're connected to Cisco switches, especially when STP is turned on. Very odd behavior and we haven't found a solution yet. We'd better come up with something fast because we're getting more of those pieces of junk soon. John >>> "Dain Deutschman" 8/14/02 9:26:02 PM >>> Also...I have tested the wiring(basic tester...no NEXT/FEXT or other factors...but lengths of cable are under 50ft) and replaced patch cables...still no luck. Dain. ""Dain Deutschman"" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > Hello Everyone, > > I have a Cat2950 in a small office throwing up thousands of CRCs, input > errors and several runts on the port connected to the server. Clients are > getting disconnected and database on server is constantly having to be > repaired. The errors always follow the server no matter which port I move it > to. Have replaced NIC in server and a few key Wkst. Have also updated the > NIC drivers. ( Win2000 w/3C905C-TX-M Nics ). I have forced speed and duplex > settings and disabled spanning-tree. I'm suspecting dirty power...but it is > connected to a UPS ( that only has limited EMI/RFI Filtering ). I connect a > 3Com unmanaged 8 port switch to the key clients and the server...no more > problems. Any ideas?!? It's driving me nuts! Thanks in advance... > -- > Dain Deutschman > CNA, MCP, CCNA > Data Communications Manager > New Star Sales and Service, Inc. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=51445&t=51419 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Catalyst 2950 CRC Errors [7:51419]
Also...I have tested the wiring(basic tester...no NEXT/FEXT or other factors...but lengths of cable are under 50ft) and replaced patch cables...still no luck. Dain. ""Dain Deutschman"" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > Hello Everyone, > > I have a Cat2950 in a small office throwing up thousands of CRCs, input > errors and several runts on the port connected to the server. Clients are > getting disconnected and database on server is constantly having to be > repaired. The errors always follow the server no matter which port I move it > to. Have replaced NIC in server and a few key Wkst. Have also updated the > NIC drivers. ( Win2000 w/3C905C-TX-M Nics ). I have forced speed and duplex > settings and disabled spanning-tree. I'm suspecting dirty power...but it is > connected to a UPS ( that only has limited EMI/RFI Filtering ). I connect a > 3Com unmanaged 8 port switch to the key clients and the server...no more > problems. Any ideas?!? It's driving me nuts! Thanks in advance... > -- > Dain Deutschman > CNA, MCP, CCNA > Data Communications Manager > New Star Sales and Service, Inc. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=51426&t=51419 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Catalyst 2950 CRC Errors [7:51419]
Hello Everyone, I have a Cat2950 in a small office throwing up thousands of CRCs, input errors and several runts on the port connected to the server. Clients are getting disconnected and database on server is constantly having to be repaired. The errors always follow the server no matter which port I move it to. Have replaced NIC in server and a few key Wkst. Have also updated the NIC drivers. ( Win2000 w/3C905C-TX-M Nics ). I have forced speed and duplex settings and disabled spanning-tree. I'm suspecting dirty power...but it is connected to a UPS ( that only has limited EMI/RFI Filtering ). I connect a 3Com unmanaged 8 port switch to the key clients and the server...no more problems. Any ideas?!? It's driving me nuts! Thanks in advance... -- Dain Deutschman CNA, MCP, CCNA Data Communications Manager New Star Sales and Service, Inc. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=51419&t=51419 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
