# use -i ifconfig
NAME=ifconfig
DESCRIPTION=Utility for configuring network interfaces
DATE=2008/10/20-23:14:04-EDT
STATE=Stable
HOST=trunkbuild
USER=builder
VERSION=6.4.0


# ifconfig --help
ifconfig: illegal option -- -
usage: ifconfig [-h] [-m] [-v] [-z] [-L] interface
        [ af [ address [ dest_addr ] ] [ netmask mask ] [ prefixlen n ]
                [ alias | -alias ] ]
        [ up ] [ down ] [ metric n ] [ mtu n ]
        [ nwid network_id ] [ nwkey network_key | -nwkey ]
        [ powersave | -powersave ] [ powersavesleep duration ]
        [ hidessid | -hidessid ] [ apbridge | -apbridge ]
        [ [ af ] tunnel src_addr dest_addr ] [ deletetunnel ]
        [ arp | -arp ]
        [ media type ] [ mediaopt opts ] [ -mediaopt opts ] [ instance minst ]
        [ preference n ]
        [ vlan n vlanif i ]
        [ agrport i ] [ -agrport i ]
        [ anycast | -anycast ] [ deprecated | -deprecated ]
        [ tentative | -tentative ] [ pltime n ] [ vltime n ] [ eui64 ]
        [ link0 | -link0 ] [ link1 | -link1 ] [ link2 | -link2 ]
       ifconfig -a [-b] [-h] [-m] [-d] [-u] [-v] [-z] [ af ]
       ifconfig -l [-b] [-d] [-u] [-s]
       ifconfig -C
       ifconfig interface create
       ifconfig interface destroy
=> No option to enable the hw checksum.

# ifconfig tsec1     
tsec1: flags=8802<BROADCAST,SIMPLEX,MULTICAST> mtu 1500
        capabilities rx=7<IP4CSUM,TCP4CSUM,UDP4CSUM>
        capabilities tx=0
        enabled=0
        address: 00:e0:0c:00:01:fd
        media: Ethernet none
# ifconfig tsec1 172.18.80.231
# ifconfig tsec1                                                          
tsec1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500        
        capabilities rx=7<IP4CSUM,TCP4CSUM,UDP4CSUM>                      
        capabilities tx=0                                                 
        enabled=0                                                         
        address: 00:e0:0c:00:01:fd                                        
        media: Ethernet autoselect (100baseTX full-duplex)                
        status: active                                                    
        inet 172.18.80.231 netmask 0xffff0000 broadcast 172.18.255.255    
# ifconfig tsec1 ip4csum tcp4csum udp4csum                                
ifconfig: SIOCSIFCAP: Invalid argument                                              
# ifconfig tsec1                                                          
tsec1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500        
        capabilities rx=7<IP4CSUM,TCP4CSUM,UDP4CSUM>                      
        capabilities tx=0                                                 
        enabled=0                                                         
        address: 00:e0:0c:00:01:fd                                        
        media: Ethernet autoselect (100baseTX full-duplex)
        status: active
        inet 172.18.80.231 netmask 0xffff0000 broadcast 172.18.255.255
# ifconfig tsec1 ip4csum-tx tcp4csum-tx udp4csum-tx
ifconfig: SIOCSIFCAP: Invalid argument
#