Hi Jason,

I would recommend clearing the counters on the interface that having the issue? 

Clear counter gi0/2.. and monitor for a few minutes.... It looks like the GBIC 
may be going bad, try replacing it...

I would also recommend having the cable dogs do a Db loss test on the fiber, 
just to see if the tips are good..

Best of luck...




________________________________
From: Jason LeBlanc <[email protected]>
To: [email protected]
Sent: Thu, December 3, 2009 6:23:18 PM
Subject: [OSL | CCIE_RS] 7200 <-> 6506 Fiber

Hello, 

I am having trouble with input errors and overrun errors between a Cisco 
7206VXR (NPE-G1) and a cisco WS-C6506:

GigabitEthernet0/2 is up, line protocol is up 
  Hardware is BCM1250 Internal MAC, address is 000c.8651.a41a (bia 
000c.8651.a41a)
 description /* Uplink to 6509 Gig1/14 */
  Internet address is 10.1.1.2/30
  MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec, 
     reliability 255/255, txload 12/255, rxload 24/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full-duplex, 1000Mb/s, link type is force-up, media type is SX
  output flow-control is unsupported, input flow-control is unsupported
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input 00:00:00, output 00:00:00, output hang never
  Last clearing of "show interface" counters 04:33:41
  Input queue: 1/75/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 94404000 bits/sec, 18329 packets/sec
  5 minute output rate 47074000 bits/sec, 24034 packets/sec
     249326344 packets input, 169932937197 bytes, 0 no buffer
     Received 4796 broadcasts, 0 runts, 0 giants, 0 throttles
     17233 input errors, 0 CRC, 0 frame, 17233 overrun, 0 ignored   <---- Errors
     0 watchdog, 4796 multicast, 0 pause input
     0 input packets with dribble condition detected
     304531507 packets output, 67231420161 bytes, 0 underruns
     0 output errors, 0 collisions, 0 interface resets
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier, 0 pause output
     0 output buffer failures, 0 output buffers swapped out

GigabitEthernet1/14 is up, line protocol is up (connected)
  Hardware is C6k 1000Mb 802.3, address is 0006.2a22.6400 (bia 0006.2a22.6400)
 description /* Uplink to 7200 Gig0/2 */
  Internet address is 10.1.1.1/30
  MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec, 
     reliability 255/255, txload 23/255, rxload 12/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full-duplex, 1000Mb/s, media type is SX
  input flow-control is off, output flow-control is off
  Clock mode is auto
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input 00:00:00, output 00:00:00, output hang never
  Last clearing of "show interface" counters 19w3d
  Input queue: 0/75/0/3494 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 48767000 bits/sec, 23812 packets/sec
  5 minute output rate 92734000 bits/sec, 17980 packets/sec
  L2 Switched: ucast: 60531768 pkt, 5655063889 bytes - mcast: 2130916 pkt, 
682139248 bytes
  L3 in Switched: ucast: 126175090872 pkt, 27258494314476 bytes - mcast: 0 pkt, 
0 bytes mcast
  L3 out Switched: ucast: 89343262158 pkt, 48967491000849 bytes mcast: 0 pkt, 0 
bytes
     126210460243 packets input, 27258566888042 bytes, 0 no buffer
     Received 2326763 broadcasts, 0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 input packets with dribble condition detected
     89334634869 packets output, 48958989988931 bytes, 0 underruns
     0 output errors, 0 collisions, 0 interface resets
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier
     0 output buffer failures, 0 output buffers swapped out

interface GigabitEthernet0/2
 description /* Uplink to 6509 Gig1/14 */
 ip address 10.1.1.2 255.255.255.252
 no ip redirects
 ip route-cache flow
 duplex full
 speed 1000
 media-type gbic
 no negotiation auto
end

interface GigabitEthernet1/14
 description /* Uplink to 7200 Gig0/2 */
 ip address 10.1.1.1 255.255.255.252
 speed nonegotiate
end


Is there a recommended configuration for fiber connects between these two 
device types?

Regards,

Jason


      
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