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EOBC0/0 Transmit Error

sajism220
Level 1
Level 1

‎07-31-2011 10:40 PM

Hi Guys,

These days some our PE  routers showing the EOBC0/0 Transmit errors, attached the graph reference, any one have idea why this is happening.

a-d1#show eobc
  Statistics for eobc from SP/RP to linecards
        Hardware is RSP720 EOBC

Interface information:
        Interface EOBC0/0(idb 0x17365024)
        1417886456 packets input, 1700074979054 bytes
        40 broadcasts received
        1377266729 packets output, 118738349939 bytes
        7 broadcasts sent

Dev_Instance=0x17993830 395917360
Receive/Transmit Buffer Descriptors
        RingSz  Shadow   StartBD  LastBD   Head  Tail Pend
  Rx0    512   17993EB0  3D51CAC0 3D51DAB8   99    0    0 
  Tx0    512   0         3D51DB00 3D51EAF8   41    41   0 

  Rx Drop On Busy Disabled

ETSEC counters in Hardware

64b         = 192        64b-127b    = 570        128b-255b   = 615      
256b-511b   = 817        512b-1023b  = 115        1024b-1518b = 531      
1519b-1522b = 0          RxBytes     = 0          RxPkt       = 755      
RxFCSErr    = 0          RxMCast     = 438        RxBCast     = 40       
RxCntrlFr   = 0          RxPauseFR   = 0          RxUnkop     = 0        
RxAlignErr  = 0          RxLenErr    = 0          RxCodeErr   = 0        
RxSenseErr  = 0          RxUnder     = 21424      RxOver      = 0        
RxFrag      = 55379      RxJab       = 0          RxDrop      = 0        
RxFilerRej  = 0          Txbytes     = 0          TxPkt       = 41       
TxMCast     = 5          TxBCast     = 0          TxPause     = 0        
TxDef       = 2136       TxCol       = 3088       TxMCol      = 1537     
TxLateCol   = 0          TxExCol     = 1          TxTotCol    = 561      
TxDrop      = 0          TxJab       = 0          TxFCS       = 0        
TxOver      = 0          TxUnder     = 0          TxFrg       = 0        


  Statistics for eobc fifo between RP and SP
        Hardware is RSP720 FIFO EOBC

Interface information:
        Interface EOBC0/2(idb 0x17999FF0)
        321087162 packets input, 138692204000 bytes
        0 broadcasts received
        315793362 packets output, 39400141202 bytes
        0 broadcasts sent

Dev_Instance=0x17FC87FC 402425852
Receive/Transmit Buffer Descriptors
        RingSz  Shadow   StartBD  LastBD   Head  Tail Pend
  Rx0    256   17FC8E7C  3E05EB40 3E05F338   186   0    0 
  Tx0    256   0         3E05F380 3E05FB78   210   210  0 

  Rx Drop On Busy Disabled

ETSEC counters in Hardware

64b         = 173        64b-127b    = 96         128b-255b   = 283      
256b-511b   = 185        512b-1023b  = 56         1024b-1518b = 883      
1519b-1522b = 0          RxBytes     = 0          RxPkt       = 698      
RxFCSErr    = 0          RxMCast     = 0          RxBCast     = 0        
RxCntrlFr   = 0          RxPauseFR   = 0          RxUnkop     = 0        
RxAlignErr  = 0          RxLenErr    = 0          RxCodeErr   = 0        
RxSenseErr  = 0          RxUnder     = 0          RxOver      = 0        
RxFrag      = 0          RxJab       = 0          RxDrop      = 0        
RxFilerRej  = 0          Txbytes     = 0          TxPkt       = 978      
TxMCast     = 0          TxBCast     = 0          TxPause     = 0        
TxDef       = 0          TxCol       = 0          TxMCol      = 0        
TxLateCol   = 0          TxExCol     = 0          TxTotCol    = 0        
TxDrop      = 0          TxJab       = 0          TxFCS       = 0        
TxOver      = 0          TxUnder     = 0          TxFrg       = 0        

----------------------------------------------------------------------------

b-d1#show eobc
  Statistics for eobc from SP/RP to linecards
        Hardware is RSP720 EOBC

Interface information:
        Interface EOBC0/0(idb 0x17365024)
        2044430617 packets input, 2608024445448 bytes
        40 broadcasts received
        2015376059 packets output, 155909645334 bytes
        2 broadcasts sent

Dev_Instance=0x17993830 395917360
Receive/Transmit Buffer Descriptors
        RingSz  Shadow   StartBD  LastBD   Head  Tail Pend
  Rx0    512   17993EB0  3D51CAC0 3D51DAB8   229   0    0 
  Tx0    512   0         3D51DB00 3D51EAF8   187   187  0 

  Rx Drop On Busy Disabled

ETSEC counters in Hardware

64b         = 329        64b-127b    = 381        128b-255b   = 726      
256b-511b   = 292        512b-1023b  = 811        1024b-1518b = 829      
1519b-1522b = 0          RxBytes     = 0          RxPkt       = 299      
RxFCSErr    = 0          RxMCast     = 733        RxBCast     = 40       
RxCntrlFr   = 0          RxPauseFR   = 0          RxUnkop     = 0        
RxAlignErr  = 0          RxLenErr    = 0          RxCodeErr   = 0        
RxSenseErr  = 0          RxUnder     = 21436      RxOver      = 0        
RxFrag      = 12026      RxJab       = 0          RxDrop      = 0        
RxFilerRej  = 0          Txbytes     = 0          TxPkt       = 699      
TxMCast     = 0          TxBCast     = 0          TxPause     = 0        
TxDef       = 1528       TxCol       = 929        TxMCol      = 2682     
TxLateCol   = 0          TxExCol     = 8          TxTotCol    = 942      
TxDrop      = 0          TxJab       = 0          TxFCS       = 0        
TxOver      = 0          TxUnder     = 0          TxFrg       = 0        


  Statistics for eobc fifo between RP and SP
        Hardware is RSP720 FIFO EOBC

Interface information:
        Interface EOBC0/2(idb 0x17999FF0)
        324633619 packets input, 139918183984 bytes
        0 broadcasts received
        322656775 packets output, 34886257746 bytes
        0 broadcasts sent

Dev_Instance=0x17FC87FC 402425852
Receive/Transmit Buffer Descriptors
        RingSz  Shadow   StartBD  LastBD   Head  Tail Pend
  Rx0    256   17FC8E7C  3E05EB40 3E05F338   19    0    0 
  Tx0    256   0         3E05F380 3E05FB78   7     7    0 

  Rx Drop On Busy Disabled

ETSEC counters in Hardware

64b         = 395        64b-127b    = 94         128b-255b   = 624      
256b-511b   = 962        512b-1023b  = 844        1024b-1518b = 691      
1519b-1522b = 0          RxBytes     = 0          RxPkt       = 19       
RxFCSErr    = 0          RxMCast     = 0          RxBCast     = 0        
RxCntrlFr   = 0          RxPauseFR   = 0          RxUnkop     = 0        
RxAlignErr  = 0          RxLenErr    = 0          RxCodeErr   = 0        
RxSenseErr  = 0          RxUnder     = 0          RxOver      = 0        
RxFrag      = 0          RxJab       = 0          RxDrop      = 0        
RxFilerRej  = 0          Txbytes     = 0          TxPkt       = 519      
TxMCast     = 0          TxBCast     = 0          TxPause     = 0        
TxDef       = 0          TxCol       = 0          TxMCol      = 0        
TxLateCol   = 0          TxExCol     = 0          TxTotCol    = 0        
TxDrop      = 0          TxJab       = 0          TxFCS       = 0        
TxOver      = 0          TxUnder     = 0          TxFrg       = 0

Please revert back,

Regards

-Saji

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rsimoni
Cisco Employee
Cisco Employee

‎08-03-2011 11:08 AM

Hi Saji,

there is nothing worriesome about those stats.

Which NMS tool do you use, Solarwind by any chance?

Which exact counter are you referring to as an error?

Do you have error messages in the sys log?

Which IOS is your 7600 running?

In general there is no benefit in monitoring EOBC as this is an internal port which cannot be configured or tweaked anyway. Also EOBC is a shared half duplex medium used for communication between Sup/RSP and line cards. Only management traffic goes through it meaning that there is no impact for system performance. As a shared half duplex medium collisions and errors are expected every now and then.

If you don't see any sys log related to EOBC you don't have anything to be worried about.

Riccardo

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