Hello ! AFAIK, это баг в IOS'е. Если у вас есть хотя бы гостевой доступ к ftp.cisco.com (зарегистрироваться на сайте и получить его можно любому), то ftp://ftp.cisco.com/pub/lan/catalyst/2950/c2950-i6q4l2-mz.121-22.EA1.bin должен вам помочь. On Fri, Jan 28, 2005 at 10:08:02PM +0200, Yury Yaroshevsky wrote:
Добрый день,
Есть 2611 связанная с 2950-24 через dot1.q trunk между ними. Возникла непонятная проблемка на 2950-24. В какой-то произвольный момент времени на 2950-24 перестают ходить пакеты в сторону 2611. Причем именно 2950-24 перестает посылать пакетики. На вход же 2950-24 (от 2611) пакетики продолжают исправно поступать.
Вот как это выглядит:
xxxxxx-sw#sh int fa0/24 FastEthernet0/24 is up, line protocol is up (connected) Hardware is Fast Ethernet, address is yyyy.yyyy.ac58 (bia yyyy.yyyy.ac58) Description: -=[ Trunk to E0/1 on xxxxxx.donbass.net (rezerv) ]=- MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation ARPA, loopback not set Keepalive set (10 sec) Half-duplex, 10Mb/s input flow-control is off, output flow-control is off ARP type: ARPA, ARP Timeout 04:00:00 Last input never, 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) 30 second input rate 0 bits/sec, 0 packets/sec 30 second ouxtput rate 0 bits/sec, 0 packets/sec 1775 packets input, 1831423 bytes, 0 no buffer Received 27 broadcasts, 89 runts, 0 giants, 0 throttles 89 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored 0 watchdog, 1 multicast, 0 pause input 0 input packets with dribble condition detected 10605 packets output, 5466867 bytes, 0 underruns 0 output errors, 75 collisions, 1 interface resets 0 babbles, 0 late collision, 448 deferred 0 lost carrier, 0 no carrier, 0 PAUSE output 0 output buffer failures, 0 output buffers swapped out
xxxxxx-sw# sh int fa0/24 FastEthernet0/24 is up, line protocol is up (connected) Hardware is Fast Ethernet, address is yyyy.yyyy.ac58 (bia yyyy.yyyy.ac58) Description: -=[ Trunk to E0/1 on xxxxxx.donbass.net (rezerv) ]=- MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation ARPA, loopback not set Keepalive set (10 sec) Half-duplex, 10Mb/s input flow-control is off, output flow-control is off ARP type: ARPA, ARP Timeout 04:00:00 Last input never, 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) 30 second input rate 0 bits/sec, 0 packets/sec 30 second ouxtput rate 0 bits/sec, 0 packets/sec 1816 packets input, 1855189 bytes, 0 no buffer Received 27 broadcasts, 89 runts, 0 giants, 0 throttles 89 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored 0 watchdog, 1 multicast, 0 pause input 0 input packets with dribble condition detected 10605 packets output, 5466867 bytes, 0 underruns 0 output errors, 75 collisions, 1 interface resets 0 babbles, 0 late collision, 448 deferred 0 lost carrier, 0 no carrier, 0 PAUSE output 0 output buffer failures, 0 output buffers swapped out
xxxxxx-sw#cle counters fastEthernet 0/24 Clear "show interface" counters on this interface [confirm]
xxxxxx-sw#sh int fa0/24 FastEthernet0/24 is up, line protocol is up (connected) Hardware is Fast Ethernet, address is yyyy.yyyy.ac58 (bia yyyy.yyyy.ac58) [skip] Last clearing of "show interface" counters 00:00:10 Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0 Queueing strategy: fifo Output queue :0/40 (size/max) 30 second input rate 0 bits/sec, 0 packets/sec 30 second ouxtput rate 0 bits/sec, 0 packets/sec 6 packets input, 3410 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 watchdog, 0 multicast, 0 pause input 0 input packets with dribble condition detected 0 packets output, 0 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 PAUSE output 0 output buffer failures, 0 output buffers swapped out
В логах ничего аномального не наблюдается:
xxxxxx-sw# sh logg [skip] *Mar 1 02:00:25.343 EET: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/24, changed state to down .Jan 28 17:51:32.050 EET: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/24, changed state to up .Jan 28 17:51:32.062 EET: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan1, changed state to up
MAC 2611 на порту 2950-24 присутствует:
xxxxxx-sw#sh mac-address-table address zzzz.zzzz.db61 Mac Address Table -------------------------------------------
Vlan Mac Address Type Ports ---- ----------- -------- ----- 5 zzzz.zzzz.db61 DYNAMIC Fa0/24 2 zzzz.zzzz.db61 DYNAMIC Fa0/24 3 zzzz.zzzz.db61 DYNAMIC Fa0/24 4 zzzz.zzzz.db61 DYNAMIC Fa0/24 1 zzzz.zzzz.db61 DYNAMIC Fa0/24 Total Mac Addresses for this criterion: 5
xxxxxx-sw#sh ip arp Protocol Address Age (min) Hardware Addr Type Interface Internet aaa.bbb.ccc.17 8 zzzz.zzzz.db61 ARPA Vlan1 Internet aaa.bbb.ccc.18 - yyyy.yyyy.ac40 ARPA Vlan1
xxxxxx-sw#ping aaa.bbb.ccc.17
Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to aaa.bbb.ccc.17, timeout is 2 seconds: ..... Success rate is 0 percent (0/5)
xxxxxx-sw#sh int fa0/24 FastEthernet0/24 is up, line protocol is up (connected) Hardware is Fast Ethernet, address is yyyy.yyyy.ac58 (bia yyyy.yyyy.ac58) [skip] Last clearing of "show interface" counters 00:03:16 Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0 Queueing strategy: fifo Output queue :0/40 (size/max) 30 second input rate 0 bits/sec, 0 packets/sec 30 second ouxtput rate 0 bits/sec, 0 packets/sec 335 packets input, 173084 bytes, 0 no buffer Received 5 broadcasts, 0 runts, 0 giants, 0 throttles 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored 0 watchdog, 0 multicast, 0 pause input 0 input packets with dribble condition detected 0 packets output, 0 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 PAUSE output 0 output buffer failures, 0 output buffers swapped out
При этом по Vlan1 (с 2950-24 на 2611) покеты уходят :
xxxxxx-sw# sh int vlan 1 Vlan1 is up, line protocol is up Hardware is CPU Interface, address is yyyy.yyyy.ac40 (bia yyyy.yyyy.ac40) [skip] 5 minute input rate 0 bits/sec, 0 packets/sec 5 minute output rate 3000 bits/sec, 5 packets/sec 1016 packets input, 71394 bytes, 0 no buffer Received 79 broadcasts, 0 runts, 0 giants, 0 throttles 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored 7585 packets output, 641948 bytes, 0 underruns 0 output errors, 2 interface resets 0 output buffer failures, 0 output buffers swapped out
xxxxxx-sw# sh int vlan 1 Vlan1 is up, line protocol is up Hardware is CPU Interface, address is yyyy.yyyy.ac40 (bia yyyy.yyyy.ac40) Internet address is aaa.bbb.ccc.18/30 [skip] 5 minute input rate 0 bits/sec, 0 packets/sec 5 minute output rate 2000 bits/sec, 4 packets/sec 1021 packets input, 71710 bytes, 0 no buffer Received 80 broadcasts, 0 runts, 0 giants, 0 throttles 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored 7621 packets output, 644108 bytes, 0 underruns 0 output errors, 2 interface resets 0 output buffer failures, 0 output buffers swapped out
Только в порт смотрящий на 2611 не попадают:
xxxxxx-sw#sh int fa0/24 FastEthernet0/24 is up, line protocol is up (connected) Hardware is Fast Ethernet, address is yyyy.yyyy.ac58 (bia yyyy.yyyy.ac58) Description: -=[ Trunk to E0/1 on xxxxxx.donbass.net (rezerv) ]=- MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation ARPA, loopback not set Keepalive set (10 sec) Half-duplex, 10Mb/s input flow-control is off, output flow-control is off ARP type: ARPA, ARP Timeout 04:00:00 Last input never, output 00:00:00, output hang never Last clearing of "show interface" counters 00:17:30 Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0 Queueing strategy: fifo Output queue :0/40 (size/max) 30 second input rate 0 bits/sec, 0 packets/sec 30 second ouxtput rate 0 bits/sec, 0 packets/sec 1030 packets input, 322346 bytes, 0 no buffer Received 439 broadcasts, 0 runts, 0 giants, 0 throttles 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored 0 watchdog, 0 multicast, 0 pause input 0 input packets with dribble condition detected 0 packets output, 0 bytes, 0 underruns 0 output errors, 0 collisions, 2 interface resets 0 babbles, 0 late collision, 0 deferred 0 lost carrier, 0 no carrier, 0 PAUSE output 0 output buffer failures, 0 output buffers swapped out
Лечится эта ситуация только перезагрузкой 2950. shut/no shut, перевод порта в access mode и возврат обратно не помогают. Причем когда порт находится в access mode пакеты в него тоже не уходят. :(((
Думали что порт на 2950 битый. Переключили в другой порт 2950 - не помогло. Шнурки тоже попытались менять.
Хотелось бы знать, сталкивался ли кто-нибудь с подобной проблемой, если да - то как ее полечили?
PS.
На всякий случай привожу результат 'sh ver' с 2950:
xxxxxx-sw>sh ver Cisco Internetwork Operating System Software IOS (tm) C2950 Software (C2950-I6Q4L2-M), Version 12.1(13)EA1, RELEASE SOFTWARE (fc1) Copyright (c) 1986-2003 by cisco Systems, Inc. Compiled Tue 04-Mar-03 02:14 by yenanh Image text-base: 0x80010000, data-base: 0x805A8000
ROM: Bootstrap program is CALHOUN boot loader
xxxxxx-sw uptime is 3 hours, 15 minutes System returned to ROM by power-on System restarted at 18:41:26 EET Fri Jan 28 2005 System image file is "flash:/c2950-i6q4l2-mz.121-13.EA1.bin"
cisco WS-C2950-24 (RC32300) processor (revision J0) with 20839K bytes of memory. Processor board ID FOC0823X3YE Last reset from system-reset Running Standard Image 24 FastEthernet/IEEE 802.3 interface(s)
32K bytes of flash-simulated non-volatile configuration memory. Base ethernet MAC Address: yy:yy:yy:yy:AC:40 Motherboard assembly number: 73-5781-11 Power supply part number: 34-0965-01 Motherboard serial number: FOC072017CS Power supply serial number: PHI071900ED Model revision number: J0 Motherboard revision number: A0 Model number: WS-C2950-24 System serial number: FOC0823X3YE Configuration register is 0xF
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