>本当に1812Jの処理能力の問題か？ duplexとかちゃんと合ってる？
Input queue dropsとduplexはまったく関係ないと思うが....ピークで調べるとこんなもん↓

gw#show int f2
FastEthernet2 is up, line protocol is up
Hardware is FastEthernet, address is 0019.30xx.xxxx (bia 0019.30xx.xxxx)
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 5/255, rxload 216/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 100Mb/s
ARP type: ARPA, ARP Timeout 04:00:00
Last input never, output never, output hang never
Last clearing of "show interface" counters 02:06:25
Input queue: 0/75/46/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 83111000 bits/sec, 6534 packets/sec
5 minute output rate 2197000 bits/sec, 3429 packets/sec
43815600 packets input, 1195413061 bytes, 0 no buffer
Received 21 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 input packets with dribble condition detected
23381641 packets output, 1874669436 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out