Show interfaces Gi3/1

Question

When requesting "show interfaces Gi3/1" on my MLS i get the following output:
GigabitEthernet3/1 is up, line protocol is up (connected)
Hardware is C6k 1000Mb 802.3, address is 000f.f89b.4c0a (bia 000f.f89b.4c0a)
Internet address is 192.168.220.89/29
MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 1000Mb/s, media type is LH
input flow-control is off, output flow-control is on
Clock mode is auto
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:01, output 00:00:01, output hang never
Last clearing of "show interface" counters 22w3d
Input queue: 0/75/0/768 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
Does the Queueing strategy as well as the Output Queue refer to the "Software Queue" or "Hardware Queue"???

Answer 1

With QoS disabled you basically have a FIFO queue that is tail dropping all traffic it does not have buffer space for. If you run out of buffer spaces on a non-virtual interface, they will appear as output drops.
show interface | i drops|line
With QoS enabled you can actually look into drops per hardware queue with:
'show queueing interface gx/y'
6500 is a hardware forwarding platform, packets are switched too fast to be able to monitor queue fullness, which is why you will almost always see 0/2000/0/0 (on a L2 interface) where the first 0 is packets in queue. So drops is really the only indication of congestion.