sho int gi 1/21
GigabitEthernet1/21 is down, line protocol is down (notconnect)
Hardware is C6k 1000Mb 802.3, address is 0015.fa42.ccac (bia 0015.fa42.ccac)
Description: OFFICE-1GBIT
MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Full-duplex, 1000Mb/s, media type is LH
input flow-control is off, output flow-control is desired
Clock mode is auto
ARP type: ARPA, ARP Timeout 04:00:00
Last input never, output never, output hang never
Last clearing of "show interface" counters never
Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
порт видит что он гигабит, что в нём SFP и что он no shutdown