CSCve85121 is one example of a SMU related to fabric monitoring and debugging. I'm fairly sure we posted some others as well. Running a 'vanilla' XR installation, without any SMUs or SPs, is not something we recommend. The concept of the SMU and SP w...
Fabric links are trained at every initialisation, to optimise the setting of programmable ASIC parameters. So this could be a HW fault or a scenario in which SW could do a better job in training the link. Do you have the latest 5.3.4 Service Pack ins...
yes and yes. We recommend that you disable FPD auto-upgrade and perform the FPD upgrade manually after the IOS XR upgrade. Have you considered using CSM Server for upgrade orchestration?/Aleksandar
