Arista 7050QX puts ports with unqualified third-party QSFP+ DACs into errdisable
2
On an Arista 7050QX running EOS 4.14 the poster tried to use third-party QSFP+ DAC cables; the ports went to errdisable as unqualified transceivers. They patched the XcvrAgent.py agent under /usr/lib/python2.7/site-packages to skip the manufacturer check, which cleared the errdisable state but left the links in notconnect and the cables undetected. Arista support replied that devices are designed to support only properly qualified transceivers and declined to provide an activation key, redirecting the request to the account team.
- Hardware: Arista 7050QX
- Transceivers: third-party QSFP+ DAC
- Form factor: QSFP+, DAC
Symptoms / messages:
errdisable cause xcvr-unsupported
notconnect after patching XcvrAgent.py
cable not detected
Comments 2
A respondent suggested no errdisable recovery cause xcvr-unsupported as an alternative knob.
The official route is a licence: after signing a liability waiver Arista sales can issue an organisation-specific unlock for service unsupported-transceiver <licensee> <key>; the poster instead concluded the platform was unsuitable and recommended Juniper, where the same optics worked.