急需高手帮助解决CISCO2620出现的问题！...

一家单位通过光纤以太网形式接入internet,cisco2620的外网口F0/1直接接到光纤收发器上，动态分配IP，网段掩码为255.255.254.0；电信的网关为61.186.102.1；cisco2620的内网口接到防火墙上，IP段为192.168.2.0，掩码为255.255.255.0；但cisco2620通过NAT功能上网时外网口f0/1总是报一个错误信息“Mar 1 00:22:55.758: %AMDP2_FE-5-LATECOLL: FastEthernet0/1 transmit error”，错误信息时间间隔越来越短，两三个小时后就死机；但是，我用IP共享器替代路由器时，没有出现死机的情况。 路由器的配置如下： c2621#show run Building configuration... Current configuration : 886 bytes ! version 12.2 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname "c2621" ! enable password cisco ! ip subnet-zero ! ! ! ! ! ! ! interface FastEthernet0/0 ip address 192.168.2.1 255.255.255.0 ip access-group 111 in ip nat inside duplex auto speed auto ! interface FastEthernet0/1 ip address dhcp ip access-group 111 out ip nat outside duplex auto speed auto ! ip nat pool wang 61.186.102.2 61.186.102.254 netmask 255.255.254.0 ip nat inside source list 2 pool wang overload ip classless ip route 0.0.0.0 0.0.0.0 61.186.102.1 254 no ip http server ! ! access-list 2 permit any access-list 111 deny tcp any any eq 4444 access-list 111 deny tcp any any eq 135 access-list 111 deny tcp any any eq 69 access-list 111 permit ip any any ! line con 0 line aux 0 line vty 0 4 password liwei no login ! ! end c2621# *Mar 1 00:22:55.758: %AMDP2_FE-5-LATECOLL: FastEthernet0/1 transmit error *Mar 1 00:23:25.759: %AMDP2_FE-5-LATECOLL: FastEthernet0/1 transmit error *Mar 1 00:23:46.705: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthern et0/0, changed state to down *Mar 1 00:23:47.707: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthern et0/0, changed state to up *Mar 1 00:23:50.768: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthern et0/0, changed state to down *Mar 1 00:23:51.770: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthern et0/0, changed state to up *Mar 1 00:23:53.797: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthern et0/0, changed state to down *Mar 1 00:23:54.799: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthern et0/0, changed state to up c2621# *Mar 1 00:24:15.761: %AMDP2_FE-5-LATECOLL: FastEthernet0/1 transmit error

收发器的工作状态是正常的，这些出错的信息都是在能够上网的情况下出现的，我把路由器到收发器的网线将标准跳线及交叉线两种方式都试过，还是没有差别。而用IP共享器时为什么又没有问题呢？是不是路由器的配置有问题？而且访问量增多时出错的信息更多，死机的间隔时间也更短。

[此贴子已经被作者于2004-2-19 14:34:20编辑过]

自己顶一下，非常希望有人帮我解答一下，十分感激！！！

我现在把外网口通过交换机再接到光纤收发器上，外网口没有错误信息了，使用时间也比较长，暂时还没有出现死机的情况，但内网口频繁出现下面的错误： Mar 1 15:30:45.044: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthern et0/0, changed state to down *Mar 1 15:30:46.046: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthern et0/0, changed state to up *Mar 1 15:30:48.402: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthern et0/0, changed state to down *Mar 1 15:30:49.403: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthern et0/0, changed state to up *Mar 1 15:30:52.048: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthern et0/0, changed state to down *Mar 1 15:30:53.049: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthern et0/0, changed state to up *Mar 1 15:36:15.057: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthern et0/0, changed state to down *Mar 1 15:36:16.059: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthern et0/0, changed state to up *Mar 1 15:36:18.222: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthern et0/0, changed state to down *Mar 1 15:36:19.224: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthern et0/0, changed state to up *Mar 1 15:37:25.060: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthern et0/0, changed state to down *Mar 1 15:37:26.061: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthern et0/0, changed state to up *Mar 1 15:37:28.121: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthern et0/0, changed state to down *Mar 1 15:37:29.122: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthern et0/0, changed state to up *Mar 1 15:37:31.158: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthern et0/0, changed state to down *Mar 1 15:37:32.159: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthern et0/0, changed state to up 端口信息如下： c2621#show int f0/0 FastEthernet0/0 is up, line protocol is up Hardware is AmdFE, address is 000b.46b9.f7a0 (bia 000b.46b9.f7a0) Internet address is 192.168.2.1/24 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: 0/75/611149/0 (size/max/drops/flushes); Total output drops: 0 Queueing strategy: fifo Output queue: 0/40 (size/max) 5 minute input rate 9000 bits/sec, 6 packets/sec 5 minute output rate 14000 bits/sec, 5 packets/sec 25248 packets input, 2059296 bytes Received 13628 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 14645 packets output, 1703669 bytes, 0 underruns 0 output errors, 0 collisions, 2 interface resets 0 babbles, 0 late collision, 0 deferred 6 lost carrier, 0 no carrier 0 output buffer failures, 0 output buffers swapped out c2621#show int f0/1 FastEthernet0/1 is up, line protocol is up Hardware is AmdFE, address is 000b.46b9.f7a1 (bia 000b.46b9.f7a1) Internet address is 61.186.102.14/23 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 18000 bits/sec, 9 packets/sec 5 minute output rate 15000 bits/sec, 9 packets/sec 1403 packets input, 633446 bytes Received 271 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 6819 packets output, 703561 bytes, 0 underruns 0 output errors, 0 collisions, 2 interface resets 0 babbles, 0 late collision, 0 deferred 5557 lost carrier, 0 no carrier 0 output buffer failures, 0 output buffers swapped out 请问这是为什么？

你看看是不是和上一级的路由器的二层协议的匹配由关系啊，我以前也遇到过类似的问题，就是端口翻转，如果还是解决不了，你就去www.csdn.net或www.bluestudy.net的论坛去问问，哪儿有许多高手。