>Для начала опишите, куда подключен fa0/0 и покажите sh int fa0/0 ДО
>и ПОСЛЕ отваливания внешнего мира.
В описании проблемы ошибся...
fa0/0 подключён в локальную сеть - 192.168.0.0/255.255.255.0
#sh int fa0/0
FastEthernet0/0 is up, line protocol is up
Hardware is PQUICC_FEC, address is 0012.430c.da32 (bia 0012.430c.da32)
Internet address is 192.168.0.1/24
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 100Mb/s, 100BaseTX/FX
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 160000 bits/sec, 84 packets/sec
5 minute output rate 100000 bits/sec, 73 packets/sec
940597 packets input, 410582061 bytes
Received 5588 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog
0 input packets with dribble condition detected
939412 packets output, 236727461 bytes, 0 underruns
0 output errors, 0 collisions, 1 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out
а вот eth0/0 во внешний мир...
Состояние ДО
Ethernet0/0 is up, line protocol is up
Hardware is PQUICC Ethernet, address is 0004.dc0c.eab3 (bia 0004.dc0c.eab3)
Internet address is yy.yy.yy.yy/30
MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec,
reliability 255/255, txload 3/255, rxload 2/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Half-duplex, 10BaseT
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:03, output 00:00:00, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 74
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 92000 bits/sec, 69 packets/sec
5 minute output rate 143000 bits/sec, 73 packets/sec
931439 packets input, 247198107 bytes, 0 no buffer
Received 0 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
929805 packets output, 419832399 bytes, 0 underruns
0 output errors, 97074 collisions, 0 interface resets
0 babbles, 0 late collision, 9722 deferred
0 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out
Состояние ПОСЛЕ
пока нет....
Есть!
Ethernet0/0 is up, line protocol is up
Hardware is PQUICC Ethernet, address is 0004.dc0c.eab3 (bia 0004.dc0c.eab3)
Internet address is yy.yy.yy.yy/30
MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec,
reliability 255/255, txload 19/255, rxload 4/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Half-duplex, 10BaseT
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:00, output 00:01:11, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 2773
Queueing strategy: fifo
Output queue: 40/40 (size/max)
5 minute input rate 167000 bits/sec, 87 packets/sec
5 minute output rate 762000 bits/sec, 111 packets/sec
977266 packets input, 262298357 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
1 input errors, 0 CRC, 0 frame, 0 overrun, 1 ignored
0 input packets with dribble condition detected
983491 packets output, 465432321 bytes, 0 underruns
0 output errors, 109291 collisions, 0 interface resets
0 babbles, 0 late collision, 10165 deferred
0 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out
Причём это состояние - недоступности линка, возникает практически всегда при наличии большого исходящего трафика в каком-либо из тунеллей. (копирую компакт диск по сети из одного филиала в другой...)