07-05-2019 09:39 AM
Hello guys,
traffic between Two of our servers (different subnets) encounter packet lost sometimes.
while tracking the path between the two serveurs, i saw that they cross TWO N9K switches before they go UP to a FW doing Routing.
The two N9K are connected by VPC (3 VPC Peer links)
TWO of the VPC Peer links had high CRC errors.
is that can likely cause the packet lost between my two servers. Howcome ?
Thanks for your help.
Hicham
01-09-2020 06:29 AM
Hello,
In order to troubleshoot this issue, I think some more information would be necessary:
Please provide the configuration of the vPC/associated interfaces, as well as describe what brand the servers are, what type of NIC cards they are running and if they are bare-metal or virtual chassis. I normally see high packet loss/CRC on server port-channels due to bad Layer 1, or out-of-date NIC drivers, or incorrect forwarding by the virtual hypervisor, due to misconfiguration. vPC and VMWare/Hyper-V can be tricky with Nexus vPC. Thanks
01-09-2020 08:14 AM - edited 01-09-2020 08:16 AM
Hello
Have you checked/changed the cabling ,SFPs modules etc..regards teh crc errors?
Can you post the output:
sh vpc
sh vpc peer-keepalive
sh vpc consistency-parameters global
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