JamesonJendreas
asked on
HP Procurve - Large amount of FCS Rx Errors
I have a new setup where I have an HP 5406 linked to an IDF with can Procurve 2690al-G, that has a 10G SFP+ module. We are on MultiMode fiber, using an HP LRM 10G SFP+ module.
On my link I am seeing a really high volume of Error Rx frames (4505 total frames, 3398 Error Rx). What could cause this?????
On my link I am seeing a really high volume of Error Rx frames (4505 total frames, 3398 Error Rx). What could cause this?????
ASKER
Also, this is after a recent clear of stats and newly installed trancievers
I would make sure that eveything has been scoped, if you have one, and cleaned on all patch cables and optical jacks along the path.
And double check that the optics you are using at both ends are compatible with multimode and the peer switch.
And double check that the optics you are using at both ends are compatible with multimode and the peer switch.
And make sure everything is consistent in the type of fiber in use ie. not 62.5/125 µm at one point and 50/125 µm at another. And no mix of multimode and single mode fiber.
If it is longer than 33 meters it will have to be 50 µm multimode cable according to the LRM spec.
If it is longer than 33 meters it will have to be 50 µm multimode cable according to the LRM spec.
ASKER
Thanks - It is all 62.5μ, and we are using compatible LRM modules (HP branded LRM).
I'm replacing the patches on both ends. I fear that the run is over 33 meters, as we have to use LRM modules.
I'm surprised that the rep at HP specifically sold me these LRM modules based on the specs I gave them - Over 33m, MM fiber, 62.5 μ
I'm replacing the patches on both ends. I fear that the run is over 33 meters, as we have to use LRM modules.
I'm surprised that the rep at HP specifically sold me these LRM modules based on the specs I gave them - Over 33m, MM fiber, 62.5 μ
ASKER CERTIFIED SOLUTION
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
ASKER
Thanks - that was a bit scary! I was under the impression that SR would get me 33meters, and LRM would get me 220m. Thanks for clarifying!!!!
I'm changing out my patches right now!
Thanks
JJ
I'm changing out my patches right now!
Thanks
JJ
ASKER
Ugh
After patch switch out, I'm still getting FCS errors. After clearing the stats on that port:
Total Frames
12,872
FCS Errors:
4670
4670/12872*100= 36% packets <--- YIKES!!!!!!!!!!!!!!!!!!!!
I hope it is not the run....
After patch switch out, I'm still getting FCS errors. After clearing the stats on that port:
Total Frames
12,872
FCS Errors:
4670
4670/12872*100= 36% packets <--- YIKES!!!!!!!!!!!!!!!!!!!!
I hope it is not the run....
ASKER
OK - I was 100% wrong about this link (I'm managing remotely, and the documentation I have is wrong)
Anyway, this is NOT a fiber link back to my MDF. The fiber link is actually on a different switch. This is actually a 10G CX-4 stacking (well, interconnect) link between two switches in the same IDF.
Could the CX-4 cable be bad? That's copper...
Anyway, this is NOT a fiber link back to my MDF. The fiber link is actually on a different switch. This is actually a 10G CX-4 stacking (well, interconnect) link between two switches in the same IDF.
Could the CX-4 cable be bad? That's copper...
ASKER
Name :
MAC Address : a0b3cc-acf74f
Link Status : Up
Totals (Since boot or last clear) :
Bytes Rx : 25,863,940 Bytes Tx : 2,276,716
Unicast Rx : 64,763 Unicast Tx : 17,426
Bcast/Mcast Rx : 6317 Bcast/Mcast Tx : 316
Errors (Since boot or last clear) :
FCS Rx : 11,502 Drops Tx : 0
Alignment Rx : 0 Collisions Tx : 0
Runts Rx : 0 Late Colln Tx : 0
Giants Rx : 0 Excessive Colln : 0
Total Rx Errors : 11,502 Deferred Tx : 0
Others (Since boot or last clear) :
Discard Rx : 0 Out Queue Len : 0
Unknown Protos : 0
Rates (5 minute weighted average) :
Total Rx (Kbps) : 50,000 Total Tx (Kbps) : 50,000
Unicast Rx (Pkts/sec) : 91 Unicast Tx (Pkts/sec) : 24
B/Mcast Rx (Pkts/sec) : 7 B/Mcast Tx (Pkts/sec) : 0
Utilization Rx : 00.50 % Utilization Tx : 00.50 %