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Nexus 93180YC-EX interface errors

Hey guys,

there is a Nexus 93180YC-EX which is connected to a vpc pair of N5K.

It looks like that:

        eth1/1 -----  N5K1 (eth1/6)

N9K                           |

       eth1/2  -----  N5K2 (eth1/6)

 

eth1/1 and eth1/2 on N9K are members of a portchannel.

eth1/6 of both N5K are members of a portchannel. That portchannel is member of a vpc.

 

Cables are SFP-H10GB-CU5M.

 

There are input errors (no CRC) on eth1/1, eth1/2 and the portchannel interface of N9K. On eth1/6 of both N5K are no input errors. The input errors are increasing steadily, they don't stop.

I already replaced the cables, but that didn't work.

What do you suggest to do?

Thank you!

 

sh int ethernet 1/1:

RX
28089801291 unicast packets 10746261 multicast packets 6551339 broadcast packets
28107267048 input packets 15113697035637 bytes
320345691 jumbo packets 0 storm suppression bytes
0 runts 168157 giants 0 CRC 0 no buffer
168157 input error 0 short frame 0 overrun 0 underrun 0 ignored

 

sh int ethernet 1/2:

RX
21821743095 unicast packets 3143098 multicast packets 1829995 broadcast packets
21827442849 input packets 11832309584579 bytes
312497727 jumbo packets 0 storm suppression bytes
0 runts 726661 giants 0 CRC 0 no buffer
726661 input error 0 short frame 0 overrun 0 underrun 0 ignored

 

sh int port-channel 9

RX
49918454696 unicast packets 13891277 multicast packets 8382378 broadcast packets
49941623215 input packets 26949748945019 bytes
632922010 jumbo packets 0 storm suppression bytes
0 runts 894864 giants 0 CRC 0 no buffer
894864 input error 0 short frame 0 overrun 0 underrun 0 ignored

1 REPLY 1
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Participant

You have an MTU issue, see the giants counter.
On the N5ks: show queuing interface e1/6
On N9k: show interface po9 | grep MTU

If you align the MTU on both sides that will go away.
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