Check duplex and speed settings of all interfaces in one go

One of the first things you do when checking connectivity issues on the Checkpoint (or any networking gear for that matter) is to see speed and duplex parameters of the interfaces. But have you tried to do it on a firewall with 15-20 interfaces ?
No fun entering one by one interfaces’ names. Here is the one-liner I use to get speed and duplex settings of all interfaces in one go.

# for ii in $(ifconfig | awk ' /Ethernet/ {print $1}') ;do ethtool $ii; done | egrep  'eth|Speed|Duplex'
Settings for eth0:
Speed: 100Mb/s
Duplex: Full
Settings for eth1:
Speed: 1000Mb/s
Duplex: Full
Settings for eth1.150:
Speed: 1000Mb/s
Duplex: Full
Settings for eth1.160:
Speed: 1000Mb/s
Duplex: Full
Settings for eth1.161:
Speed: 1000Mb/s
Duplex: Full
Settings for eth1.270:
Speed: 1000Mb/s
Duplex: Full
Settings for eth1.271:
Speed: 1000Mb/s
Duplex: Full

Settings for eth1.281:
Speed: 1000Mb/s
Duplex: Full
Settings for eth1.35:
Speed: 1000Mb/s
Duplex: Full
Settings for eth2:
Speed: 100Mb/s
Duplex: Full
Settings for eth3:
Speed: 1000Mb/s
Duplex: Full
Settings for eth4:
Speed: 1000Mb/s
Duplex: Full
Settings for eth4.112:
Speed: 1000Mb/s
Duplex: Full
Settings for eth4.211:
Speed: 1000Mb/s
Duplex: Full
Settings for eth4.311:
Speed: 1000Mb/s
Duplex: Full
Settings for eth4.71:
Speed: 1000Mb/s
Duplex: Full
Settings for eth4.72:
Speed: 1000Mb/s
Duplex: Full
Settings for eth4.73:
Speed: 1000Mb/s
Duplex: Full
Settings for eth4.413:
Speed: 1000Mb/s
Duplex: Full
Settings for eth4.419:
Speed: 1000Mb/s
Duplex: Full
Settings for eth4.451:
Speed: 1000Mb/s
Duplex: Full
Settings for eth4.407:
Speed: 1000Mb/s
Duplex: Full
Settings for eth4.408:
Speed: 1000Mb/s
Duplex: Full
Settings for eth5:
Speed: 1000Mb/s
Duplex: Full
Settings for eth7:
Speed: 1000Mb/s
Duplex: Full