R710 iDRAC6 serial over ssh: connect com2 returns COMMAND NOT RECOGNIZED

Hi,

I have successfully configured serial console redirection over ssh several times on various dell servers, but now I am stuck with two R710s.

The Problem

I can't use the connect command:

/admin1-> connect com2
cmdstat
    status       : 2
    status_tag   : COMMAND PROCESSING FAILED
    error        : 253
    error_tag    : COMMAND NOT RECOGNIZED

Configuration

Version

BIOS is 6.1.0, cli version output is:

/admin1-> version
SM CLP Version: 1.0.2
SM ME Addressing Version: 1.0.0b

I have configured redirection as before:

BIOS

Serial Communication	On with Console Redirection via COM2
Serial Port Address	Serial Device1=COM1, Serial Device2=COM2
External Serial Connector	Remote Access Device
Failsafe Baud Rate	115200
Remote Terminal Type	VT100/VT220
Redirection After Boot	Disabled

iDRAC

/admin1/system1/sp1-> racadm config -g cfgSerial -o cfgSerialBaudRate 115200
Object value modified successfully
/admin1/system1/sp1-> racadm config -g cfgSerial -o cfgSerialConsoleEnable 1
Object value modified successfully
/admin1/system1/sp1-> racadm config -g cfgSerial -o cfgSerialSshEnable 1
Object value modified successfully
/admin1/system1/sp1-> racadm config -g cfgSerial -o cfgSerialHistorySize 2000
Object value modified successfully