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ネットワーク・インターフェイスの状態を確認するには， netstat や kstat コマンドでできる．
$ netstat -k ... eri0: ipackets 630784 ierrors 0 opackets 113222 oerrors 3 collisions 0 ifspeed 100000000 rbytes 212426741 obytes 20641686 multircv 0 multixmt 0 dcstrcv 513925 <-- 100Mb brdcstxmt 1466 norcvbuf 0 noxmtbuf 0 inits 2 rx_inits 3 tx_inits 1 nocarrier 1 nocanput 0 allocbfail 0 drop 0 pause_rcv_cnt 0 pause_on_cnt 0 pause_off_cnt 0 pause_time_cnt 0 txmac_urun 0 txmac_maxpkt_err 0 excessive_coll 0 late_coll 0 first_coll 0 defer_timer_exp 0 peak_attempt_cnt 0 jabber 0 no_tmds 0 tx_hang 0 rx_corr 0 no_free_rx_desc 0 rx_overflow 0 rx_hang 0 rx_align_err 0 rx_crc_err 0 rx_length_err 0 rx_code_viol_err 0 bad_pkts 0 runt 0 toolong_pkts 0 rxtag_error 0 parity_error 0 pci_error_interrupt 0 unknown_fatal 0 pci_data_parity_err 0 pci_signal_target_abort 0 pci_rcvd_target_abort 0 pci_rcvd_master_abort 0 pci_signal_system_err 0 pci_det_parity_err 0 ipackets64 630784 opackets64 113222 rbytes64 212426741 obytes64 20641686 pmcap 4 link_up 1 link_duplex 2 <-- Full Duplex ...
$ kstat
...
module: eri instance: 0
name: eri0 class: net
allocbfail 0
bad_pkts 0
brdcstrcv 513935
brdcstxmt 1466
collisions 0
crtime 63.810710208
defer_timer_exp 0
drop 0
excessive_coll 0
first_coll 0
ierrors 0
ifspeed 100000000 <-- 100Mb
inits 2
ipackets 632560
ipackets64 632560
jabber 0
late_coll 0
link_duplex 2 <-- Full Duplex
link_up 1
multircv 0
....
