[SunHELP] how to check ethernet speed ?

[William Xu]

I can't find mii-tool, ethtool, etc for solaris. Google tells me to use
ndd. But seems i'm unable to apply it. Here is what I've tried so far: 

,----[ /sbin/ifconfig -a ]
| lo0: flags=2001000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv4,VIRTUAL> mtu 8232 index 1
|         inet 127.0.0.1 netmask ff000000 
| rtls0: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 2
|         inet 192.168.1.115 netmask ffffff00 broadcast 192.168.1.255
`----

,----[ /usr/sbin/ndd -get /dev/rtls0 link_speed ]
| operation failed: Invalid argument
`----

Any suggestions would be greatly appreciated.

-- 
William