# Errors with Cisco Nexus switch
**URL:** https://forums.digi.com/t/errors-with-cisco-nexus-switch/20269
**Category:** NET+OS
**Tags:** netos, network, cisco, nexus
**Created:** [February 20, 2019, 2:22am UTC](https://forums.digi.com/t/errors-with-cisco-nexus-switch/20269 "2019-02-20T02:22:59Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@steved2](https://forums.digi.com/u/steved2)
#### Post date: [February 20, 2019, 2:22am UTC](https://forums.digi.com/t/errors-with-cisco-nexus-switch/20269/1 "2019-02-20T02:22:59Z")
We have a customer using multiple units containing Connectcore 9215 and ME9210 modules; all satisfactory so far. Software is Net+O/S 7.5, generally no more than 2 years old.
They are now moving to Cisco Nexus switches, and have encountered problems talking to all our products (among others). Network traffic is generally not demanding; probably 20 messages per second at most, and often much less.
Typical symptoms are that after 10-15 minutes of error-free operation, the unit becomes inaccessible. It recovers after about 20 seconds. The process repeats at intervals, then reaches a point where our unit locks up completely, requiring a power cycle to reset.
Has anyone else seen similar problems?
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### Author:  [@LeonidM](https://forums.digi.com/u/LeonidM)
#### Post date: [February 20, 2019, 1:12pm UTC](https://forums.digi.com/t/errors-with-cisco-nexus-switch/20269/2 "2019-02-20T13:12:21Z")
Are you able to reproduce this on a module with JTAG? if so, when you reproduce it pause the execution and look at the call stack. Is auto-negotiation enabled on the switch? If not and there is a duplex mismatch the ethernet will stall.