Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
Community Member

crc errors on uplink ports to our Nexus 7000


we have several uplink ports on a verity of cisco switches connecting to the nexus 7000, recording CRC errors.

most are trunked ports with the following configuration.

access switch:

interface GigabitEthernet0/25

switchport trunk encapsulation dot1q

switchport mode trunk

switchport nonegotiate

end

nexus port:

interface Ethernet1/19

switchport

switchport mode trunk

no shutdown.

nexus is running:

version 5.2(1)

switch is running:

ws-c3560G-24TS    12.2(35)SE5

do not see any performance issues, just crc errors.  Any ideas?

Everyone's tags (4)
2 REPLIES
Cisco Employee

crc errors on uplink ports to our Nexus 7000

What type of module is in the N7K? Can you tell us if the problem is on 1 module or across multiple? Do the errors also show up as input errors?

Thanks,
Dale

Community Member

Re: crc errors on uplink ports to our Nexus 7000

modules:

48 port 1000 Mbps Optical Ethernet Module  N&K-M148GS-11

it is happening over two modules we have.

Nexus 7K Mod  Ports  Module-Type                        Model              Status ---  -----  ----------------------------------- ------------------ ----------

1    48    1000 Mbps Optical Ethernet Module  N7K-M148GS-11      ok

2    8      10 Gbps Ethernet XL Module          N7K-M108X2-12L    ok

3    48    10/100/1000 Mbps Ethernet Module    N7K-M148GT-11      ok

5    0      Supervisor module-1X                N7K-SUP1          active *

6    0      Supervisor module-1X                N7K-SUP1          ha-standby

8    48    10/100/1000 Mbps Ethernet Module    N7K-M148GT-11      ok

9    8      10 Gbps Ethernet XL Module          N7K-M108X2-12L    ok

10  48    1000 Mbps Optical Ethernet Module  N7K-M148GS-11      ok

example of access switch uplink port:

GigabitEthernet0/25 is up, line protocol is up (connected)

Hardware is Gigabit Ethernet, address is 3cdf.1ec7.f999 (bia 3cdf.1ec7.f999)   MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,     reliability 255/255, txload 1/255, rxload 20/255   Encapsulation ARPA, loopback not set   Keepalive not set   Full-duplex, 1000Mb/s, link type is auto, media type is 1000BaseSX SFP   input flow-control is off, output 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 2d19h   Input queue: 0/75/0/0 (size/max/drops/flushes);

Total output drops: 0   Queueing strategy: fifo   Output queue: 0/40 (size/max)

5 minute input rate 79949000 bits/sec, 7092 packets/sec  

5 minute output rate 1975000 bits/sec, 3432 packets/sec    

1638438298 packets input, 2268962487134 bytes, 0 no buffer    

Received 98383573 broadcasts (0 multicasts)     0 runts, 0 giants, 0 throttles    

96602 input errors, 96602 CRC, 0 frame, 0 overrun, 0 ignored    

0 watchdog, 62304948 multicast, 0 pause input     0 input packets with dribble condition detected    

742062096 packets output, 96087437772 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

2191
Views
0
Helpful
2
Replies
CreatePlease to create content