I'm currently engaged with TAC regarding a defect on FTD 6.6 / FPR1120.
Seems there's something wrong...
in 6.4: Management port is working at both 100Mb/sec and Gig Speed.
in 6.5 : Management port is working only at Gig speed during reimage and subsequent reboot unless you power off completely the FPR1120, remove power, wait 20 seconds and cold start. Works correctly afterwards.
in 6.6 : Management port is working only at Gig during reimage. Do not work at 100Mb/sec at all, even after reboot, power off or whatever
Test were made using two brands (Cisco / HP Procurve) and 3 Models (2524,2960,3560), using straight and crossover cable (does not matter).
If you have physical access to FPR 1120 units, would you please check ? I would like to know if I need a RMA or if it is a common software bug.
6.6 is totally new to me (need to explore)
have you look at the interface config and setup manual (rather auto) ? see if that works (sorry if you already tried or not working on this case?)
Check the Auto-negotiation check box (the default) to auto-detect the speed and duplex. If you uncheck it, you can set the speed and duplex manually:
Duplex—Choose Full or Half.
Speed—Choose 10mbps, 100mbps, or 1gbps.
Bug has been reproduced in Cisco LAB by TAC and acknowledged : defect filled.
Meanwhile, I will connect the FPR Mgmt port to a Gig Port.
Workaround for this bug (duplicate):
In short: you can force the mgmt port speed to 100Mb in FxOS using undocumented command.
Or connect the mgmt only to a Gig Port.