如何查詢網絡設備的接口是單工還是雙工?
單工即半雙工表示同一時刻,只能收或者發;
全雙工表示同一時刻,可以同時收和發;
命令很簡單:
Router>enable
Router#show interface g0/0
GigabitEthernet0/0 is administratively down, line protocol is down (disabled)
Hardware is CN Gigabit Ethernet, address is 0001.97c4.6501 (bia 0001.97c4.6501)
MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec, //該行即顯示傳輸速率
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 100Mb/s, media type is RJ45 //該行即顯示單工還是雙工模式,Full-duplex爲雙工。
……
再舉一例:
Switch>enable
Switch#show interface f0/1
FastEthernet0/1 is down, line protocol is down (disabled)
Hardware is Lance, address is 0001.97ab.de01 (bia 0001.97ab.de01)
BW 100000 Kbit, DLY 1000 usec, //該行即顯示傳輸速率
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Half-duplex, 100Mb/s ////該行即顯示單工還是雙工模式,Half-duplex爲單工。
……
是不是很簡單!
工匠給個建議:不同類型的設備之間進行互聯鏈路時,最好手動指定速率和雙工,以免互聯時設備間協商出問題!