CRC Issues From Cat 6509-E series between C2960 switches

[SEOK KANG]

Hi all

I have a Questions from CRC issues.

I heard CRC issue is a layer 1 trouble, so I changed optical cord, SFP and moved another port.

so i grab a CRC issues in this time, I don't know what can i do troubleshooting for CRC issues.

finally, I will upgrade IOS version, i choose IOS version yet, is this correct IOS version use upgrade?

Chassis : Cat 6509-E

Supervisor Module : WS-SUP720-3B

Linecards : WS-6724-SFP and WS-6724-TX

Origin IOS version : sup-bootdisk:s72033-ipservices_wan-mz.122-18.SXF10a.bin

Upgrade IOS version : s72033-ipservices_wan-mz.122-18.SXF17a.bin

Connected Devices : C2960 Series Switch also grab a CRC issues.

If you grab a incorrect informations and suggestion IOS versions, please reply to me.

thank you

Best Regards.

From. Sean Kang

[Suresh Vinayagam Subramanian]

Hi Sean,

I dont think, you need to upgrade the IOS for CRC error . CRC is most likely Layer 1 issue .

Layer 1 issue means -- it involve below things .

Switch --GBIC--Cable ---patch panel -- cable-- GBIC --switch .

IS the devices connected directly or thr' patch panel . 

Did you replace the GBIC and cable both side.

I would do below thing to narrow down the issue.

1. Change GBIC , cable, patch panel port both side.

2. Move the one side switch port.

3. If the issue not resolved then other side also .

Hope above things will help to narrow down the issue. 

HTH

Regards,

VS.Suresh.

*Plz rate the usefull posts *

[SEOK KANG]

Hi .Suresh

Thanks for your help.

Cat 6509-E connected Between Cat 2960 switch directly.

I move another port, (origin port : gi 1/8 -> new port : gi 1/17) it's same result.

Tried : change optical cord and SFP, and coldboot 2960 switch

Cat 6509==SFP======direct connect====SFP==2960 Switch
 

what can i try to another actions clear CRC issue?

TQ

Best Regards.

From Sean Kang

[Suresh Vinayagam Subramanian]

Hi Sean,

Can you please give below output

show run inter gi x/x  (both side switch interface)

show inter gix/x | in up|load|rate|err      (both side in 3 times in 2 mins internal)

Thx