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缓冲漏出是Cisco IOS(r)的软件Bug。有两种类型的缓冲区泄漏:
楔形接口缓冲区泄漏.
系统缓冲泄漏.
为了排除缓冲区泄漏故障,您必须确定遇到的缓冲区泄漏类型。在此过程中,Show interfaces和show buffers命令能够为您提供很大的帮助。
如果您有思科设备的show interfaces和show buffers命令输出,可以使用思科CLI分析器揭示潜在问题并进行修复。要使用思科 CLI 分析器,您必须是注册客户、已登录并已启用 JavaScript。
本文档没有任何特定的要求。
本文档不限于特定的软件和硬件版本。
本文档中的信息都是基于特定实验室环境中的设备编写的。本文档中使用的所有设备最初均采用原始(默认)配置。如果您使用的是真实网络,请确保您已经了解所有命令的潜在影响。
有关文件规则的更多信息请参见“ Cisco技术提示规则”。
楔形接口缓冲区泄漏会导致接口的输入队列充满,使队列无法再接收数据包。在某些特定流量条件下,接口上的输入队列会被塞满,或者换句话说,输入队列计数大于队列深度。
以下是show interfaces命令的输出示例,其中显示接口被塞满:
Ethernet0/0 is up, line protocol is up Output queue 0/40, 0 drops; input queue 76/75, 1250 drops
此类缓冲区泄漏的症状是输入队列已满(76/75)。此处,值76和75分别表示输入队列中的数据包数和输入队列的最大大小。在此情况下,输入队列中的数据包数量大于队列深度。这种现象被称为“楔入接口”。当接口被楔住时,路由器不再转发来自受影响接口的流量。
重新加载路由器以释放输入队列并恢复流量,直到队列再次充满。根据泄漏的严重性,这可能需要几秒钟到几个星期的时间。
注意:在重新加载路由器之前,请确保收集所有必要信息以确定原因。
使用以下命令可确定缓冲区泄漏的来源:
show buffers pool [pool name] [packet/header]
show buffers old(仅在启用debug sanity的情况下使用此命令。
注意:在大多数Cisco IOS软件版本中,debug sanity命令是隐藏的。启用debug sanity后,在分配和系统使用的每个缓冲区时,都对其进行健全性检查,并在释放该缓冲区时再次进行检查。
注意:您必须在特权EXEC模式(启用模式)下发出debug sanity命令。虽然此命令使用了一些CPU容量,但不会严重影响路由器的功能。与其他debug命令一样,debug sanity不会保存在配置中。因此,此命令在系统重启后将无法继续运行。
注意:要禁用健全性检查,请使用特权EXEC命令undebug sanity。)
show buffer assigned
本节讨论系统缓冲区泄漏。
以下是show buffers命令输出的示例,它显示一个系统缓冲池中存在缓冲漏出:
Middle buffers, 600 bytes (total 20825, permanent 180): 286 in free list (20 min, 400 max allowed) 89122311 hits, 99597 misses, 133679 trims, 154324 created 2247 failures (0 no memory)
此show buffers命令输出指示中间缓冲区池中存在缓冲区泄漏。路由器中总共有20825个中间缓冲区,并且可用列表中只有286个。这意味着某些进程会占用所有缓冲区,但不会返回它们。
此类缓冲区泄漏的其他症状包括池处理器或输入/输出(I/O)的“%SYS-2-MALLOCFAIL”错误消息(基于平台)。
使用以下命令可确定缓冲区泄漏的来源:
show buffers old(仅在启用debug sanity的情况下使用此命令。
注意:在大多数Cisco IOS软件版本中,debug sanity命令是隐藏的。启用debug sanity后,在分配和系统使用的每个缓冲区时,都对其进行健全性检查,并在释放该缓冲区时再次进行检查。
注意:您必须在特权EXEC模式(启用模式)下发出debug sanity命令。虽然此命令使用了一些CPU容量,但不会严重影响路由器的功能。与其他debug命令一样,debug sanity不会保存在配置中。因此,此命令在系统重启后将无法继续运行。
注意:要禁用健全性检查,请使用特权EXEC命令undebug sanity。)
show buffers pool [pool name] [packet/header]
show buffer assigned
缓冲区泄漏是Cisco IOS软件Bug。要修复已知的缓冲区泄漏Bug,请升级到您的版本系列中的最新版本。例如,如果您当前运行的是Cisco IOS软件版本11.2(14),请升级到最新的11.2(x)映像。如果没有收到效果或者无法升级路由器,请与Cisco TAC联系,并为工程师提供相关show buffers命令的输出和show tech-support命令的输出。
以下提示可帮助您识别导致缓冲区泄漏的数据包:
当您检测到缓冲区泄漏时,请使用关联的show buffers命令查找使用过多缓冲区的数据包中的模式。
当您确定数据包类型时,请尝试提出防止泄漏的解决方案(例如,使用访问列表过滤这些数据包)。
以下是相关show命令的输出示例:
Router#show interface ethernet 0/0 Ethernet0/0 is up, line protocol is up Hardware is AmdP2, address is 0050.3ee8.4060 (bia 0050.3ee8.4060) Internet address is 10.200.40.37/22 MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec, rely 255/255, load 1/255 Encapsulation ARPA, loopback not set, keepalive set (10 sec) ARP type: ARPA, ARP Timeout 04:00:00 Last input 00:00:51, output 00:00:08, output hang never Last clearing of "show interface" counters never Queueing strategy: fifo Output queue 0/40, 0 drops; input queue 76/75, 1250 drops 5 minute input rate 0 bits/sec, 0 packets/sec 5 minute output rate 0 bits/sec, 0 packets/sec 15686 packets input, 2872866 bytes, 0 no buffer Received 15342 broadcasts, 0 runts, 0 giants, 0 throttles 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort 0 input packets with dribble condition detected 10352 packets output, 1031158 bytes, 0 underruns 0 output errors, 0 collisions, 3 interface resets 0 babbles, 0 late collision, 2 deferred 0 lost carrier, 0 no carrier 0 output buffer failures, 0 output buffers swapped out Router#show buffers old Header DataArea Pool Rcnt Size Link Enc Flags Input Output 80F09828 1A00084 Small 1 54 11 11 201 Et0/0 None 80F09A34 1A001C4 Small 1 54 11 11 201 Et0/0 None 80F09C40 1A00304 Small 1 54 11 11 201 Et0/0 None 80F09E4C 1A00444 Small 1 54 11 11 201 Et0/0 None 80F0A058 1A00584 Small 1 54 11 11 201 Et0/0 None 80F0A264 1A006C4 Small 1 54 11 11 201 Et0/0 None 80F0A470 1A00804 Small 1 54 11 11 201 Et0/0 None 80F0A67C 1A00944 Small 1 54 11 11 201 Et0/0 None 80F0A888 1A00A84 Small 1 54 11 11 201 Et0/0 None 80F0AA94 1A00BC4 Small 1 54 11 11 201 Et0/0 None 80F0ACA0 1A00D04 Small 1 54 11 11 201 Et0/0 None 80F0AEAC 1A00E44 Small 1 54 11 11 201 Et0/0 None 80F0B0B8 1A00F84 Small 1 54 11 11 201 Et0/0 None 80F0B2C4 1A010C4 Small 1 54 11 11 201 Et0/0 None 80F0B4D0 1A01204 Small 1 54 11 11 201 Et0/0 None 80F0B6DC 1A01344 Small 1 54 11 11 201 Et0/0 None 80F0B8E8 1A01484 Small 1 54 11 11 201 Et0/0 None 80F0BAF4 1A015C4 Small 1 54 11 11 201 Et0/0 None 80F0BD00 1A01704 Small 1 54 11 11 201 Et0/0 None 80F0BF0C 1A01844 Small 1 54 11 11 201 Et0/0 None 80F0C118 1A01984 Small 1 54 11 11 201 Et0/0 None 80F0C324 1A01AC4 Small 1 54 11 11 201 Et0/0 None 80F0C530 1A01C04 Small 1 54 11 11 201 Et0/0 None 80F0C73C 1A01D44 Small 1 54 11 11 201 Et0/0 None 80F5F644 1B9B0A4 Small 1 54 11 11 201 Et0/0 None 80FDF118 1B78604 Small 1 54 11 11 201 Et0/0 None 80FDF324 1B78744 Small 1 54 11 11 201 Et0/0 None 80FDF530 1B78884 Small 1 54 11 11 201 Et0/0 None 80FDF73C 1B789C4 Small 1 54 11 11 201 Et0/0 None 80FDF948 1B78B04 Small 1 54 11 11 201 Et0/0 None 80FDFB54 1B78C44 Small 1 54 11 11 201 Et0/0 None 80FDFD60 1B78D84 Small 1 54 11 11 201 Et0/0 None 80FDFF6C 1B78EC4 Small 1 54 11 11 201 Et0/0 None 80FE0178 1B79004 Small 1 54 11 11 201 Et0/0 None 80FE0384 1B79144 Small 1 54 11 11 201 Et0/0 None 80FE0590 1B79284 Small 1 54 11 11 201 Et0/0 None 80FE079C 1B793C4 Small 1 54 11 11 201 Et0/0 None 80FE09A8 1B79504 Small 1 54 11 11 201 Et0/0 None 80FE0BB4 1B79644 Small 1 54 11 11 201 Et0/0 None 80FE0DC0 1B79784 Small 1 54 11 11 201 Et0/0 None 80FE0FCC 1B798C4 Small 1 54 11 11 201 Et0/0 None 80FE11D8 1B79A04 Small 1 54 11 11 201 Et0/0 None 80FE13E4 1B79B44 Small 1 54 11 11 201 Et0/0 None 80FE15F0 1B79C84 Small 1 54 11 11 201 Et0/0 None 80FE17FC 1B79DC4 Small 1 54 11 11 201 Et0/0 None 80FE1A08 1B79F04 Small 1 54 11 11 201 Et0/0 None 80FE1C14 1B7A044 Small 1 54 11 11 201 Et0/0 None 80FE1E20 1B7A184 Small 1 54 11 11 201 Et0/0 None 80FE202C 1B7A2C4 Small 1 54 11 11 201 Et0/0 None 80FE2238 1B7A404 Small 1 54 11 11 201 Et0/0 None 81107F40 1B9B1E4 Small 1 54 11 11 201 Et0/0 None 8110814C 1B9B324 Small 1 54 11 11 201 Et0/0 None 81108358 1B9B464 Small 1 54 11 11 201 Et0/0 None 81108564 1B9B5A4 Small 1 54 11 11 201 Et0/0 None 8110897C 1B9B824 Small 1 54 11 11 201 Et0/0 None 81108B88 1B9B964 Small 1 54 11 11 201 Et0/0 None 81108D94 1B9BAA4 Small 1 54 11 11 201 Et0/0 None 81108FA0 1B9BBE4 Small 1 54 11 11 201 Et0/0 None 811093B8 1B9BE64 Small 1 54 11 11 201 Et0/0 None 811095C4 1B9BFA4 Small 1 54 11 11 201 Et0/0 None 811097D0 1B9C0E4 Small 1 54 11 11 201 Et0/0 None 811099DC 1B9C224 Small 1 54 11 11 201 Et0/0 None 81109DF4 1B9C4A4 Small 1 54 11 11 201 Et0/0 None 8110A000 1B9C5E4 Small 1 54 11 11 201 Et0/0 None 8110A20C 1B9C724 Small 1 54 11 11 201 Et0/0 None 8110A418 1B9C864 Small 1 54 11 11 201 Et0/0 None 81121364 1B9CC24 Small 1 54 11 11 201 Et0/0 None 81121570 1B9CD64 Small 1 54 11 11 201 Et0/0 None 81121988 1B9CFE4 Small 1 54 11 11 201 Et0/0 None 81121B94 1B9D124 Small 1 54 11 11 201 Et0/0 None 81121FAC 1B9D3A4 Small 1 54 11 11 201 Et0/0 None 811221B8 1B9D4E4 Small 1 54 11 11 201 Et0/0 None 811225D0 1B9D764 Small 1 54 11 11 201 Et0/0 None 811227DC 1B9D8A4 Small 1 54 11 11 201 Et0/0 None 811229E8 1B9D9E4 Small 1 54 11 11 201 Et0/0 None 81122BF4 1B9DB24 Small 1 54 11 11 201 Et0/0 None Router#show buffers old header Buffer information for Small buffer at 0x80F09828 data_area 0x1A00084, refcount 1, next 0x0, flags 0x201 linktype 11 (NOVELL), enctype 11 (NOVELL-ETHER), encsize 14, rxtype 7 if_input 0x80F57BE0 (Ethernet0/0), if_output 0x0 (None) inputtime 0x4CDFC58, outputtime 0x0, oqnumber 65535 datagramstart 0x1A000CA, datagramsize 54, maximum size 260 mac_start 0x1A000CA, addr_start 0x1A000CA, info_start 0x0 network_start 0x1A000D8, transport_start 0x0 source:BE200040.0060.09c3.f9fe socket 0453 destination: BE200040.ffff.ffff.ffff socket 0453 protocol 01 Buffer information for Small buffer at 0x80F09A34 data_area 0x1A001C4, refcount 1, next 0x0, flags 0x201 linktype 11 (NOVELL), enctype 11 (NOVELL-ETHER), encsize 14, rxtype 7 if_input 0x80F57BE0 (Ethernet0/0), if_output 0x0 (None) inputtime 0x4CDFAA0, outputtime 0x0, oqnumber 65535 datagramstart 0x1A0020A, datagramsize 54, maximum size 260 mac_start 0x1A0020A, addr_start 0x1A0020A, info_start 0x0 network_start 0x1A00218, transport_start 0x0 source:BE200040.0060.09c3.f9fe socket 0453 destination: BE200040.ffff.ffff.ffff socket 0453 protocol 01 Buffer information for Small buffer at 0x80F09C40 data_area 0x1A00304, refcount 1, next 0x0, flags 0x201 linktype 11 (NOVELL), enctype 11 (NOVELL-ETHER), encsize 14, rxtype 7 if_input 0x80F57BE0 (Ethernet0/0), if_output 0x0 (None) inputtime 0x4CDF8D7, outputtime 0x0, oqnumber 65535 datagramstart 0x1A0034A, datagramsize 54, maximum size 260 mac_start 0x1A0034A, addr_start 0x1A0034A, info_start 0x0 network_start 0x1A00358, transport_start 0x0 source:BE200040.0060.09c3.f9fe socket 0453 destination: BE200040.ffff.ffff.ffff socket 0453 protocol 01 .... Router#show buffers input-interface ethernet 0/0 Header DataArea Pool Rcnt Size Link Enc Flags Input Output 80F09828 1A00084 Small 1 54 11 11 201 Et0/0 None 80F09A34 1A001C4 Small 1 54 11 11 201 Et0/0 None 80F09C40 1A00304 Small 1 54 11 11 201 Et0/0 None 80F09E4C 1A00444 Small 1 54 11 11 201 Et0/0 None 80F0A058 1A00584 Small 1 54 11 11 201 Et0/0 None 80F0A264 1A006C4 Small 1 54 11 11 201 Et0/0 None 80F0A470 1A00804 Small 1 54 11 11 201 Et0/0 None 80F0A67C 1A00944 Small 1 54 11 11 201 Et0/0 None 80F0A888 1A00A84 Small 1 54 11 11 201 Et0/0 None 80F0AA94 1A00BC4 Small 1 54 11 11 201 Et0/0 None 80F0ACA0 1A00D04 Small 1 54 11 11 201 Et0/0 None 80F0AEAC 1A00E44 Small 1 54 11 11 201 Et0/0 None 80F0B0B8 1A00F84 Small 1 54 11 11 201 Et0/0 None 80F0B2C4 1A010C4 Small 1 54 11 11 201 Et0/0 None 80F0B4D0 1A01204 Small 1 54 11 11 201 Et0/0 None 80F0B6DC 1A01344 Small 1 54 11 11 201 Et0/0 None 80F0B8E8 1A01484 Small 1 54 11 11 201 Et0/0 None 80F0BAF4 1A015C4 Small 1 54 11 11 201 Et0/0 None 80F0BD00 1A01704 Small 1 54 11 11 201 Et0/0 None 80F0BF0C 1A01844 Small 1 54 11 11 201 Et0/0 None 80F0C118 1A01984 Small 1 54 11 11 201 Et0/0 None 80F0C324 1A01AC4 Small 1 54 11 11 201 Et0/0 None 80F0C530 1A01C04 Small 1 54 11 11 201 Et0/0 None 80F0C73C 1A01D44 Small 1 54 11 11 201 Et0/0 None 80F5F644 1B9B0A4 Small 1 54 11 11 201 Et0/0 None 80FDF118 1B78604 Small 1 54 11 11 201 Et0/0 None 80FDF324 1B78744 Small 1 54 11 11 201 Et0/0 None 80FDF530 1B78884 Small 1 54 11 11 201 Et0/0 None 80FDF73C 1B789C4 Small 1 54 11 11 201 Et0/0 None 80FDF948 1B78B04 Small 1 54 11 11 201 Et0/0 None 80FDFB54 1B78C44 Small 1 54 11 11 201 Et0/0 None 80FDFD60 1B78D84 Small 1 54 11 11 201 Et0/0 None 80FDFF6C 1B78EC4 Small 1 54 11 11 201 Et0/0 None 80FE0178 1B79004 Small 1 54 11 11 201 Et0/0 None 80FE0384 1B79144 Small 1 54 11 11 201 Et0/0 None 80FE0590 1B79284 Small 1 54 11 11 201 Et0/0 None 80FE079C 1B793C4 Small 1 54 11 11 201 Et0/0 None 80FE09A8 1B79504 Small 1 54 11 11 201 Et0/0 None 80FE0BB4 1B79644 Small 1 54 11 11 201 Et0/0 None 80FE0DC0 1B79784 Small 1 54 11 11 201 Et0/0 None 80FE0FCC 1B798C4 Small 1 54 11 11 201 Et0/0 None 80FE11D8 1B79A04 Small 1 54 11 11 201 Et0/0 None 80FE13E4 1B79B44 Small 1 54 11 11 201 Et0/0 None 80FE15F0 1B79C84 Small 1 54 11 11 201 Et0/0 None 80FE17FC 1B79DC4 Small 1 54 11 11 201 Et0/0 None 80FE1A08 1B79F04 Small 1 54 11 11 201 Et0/0 None 80FE1C14 1B7A044 Small 1 54 11 11 201 Et0/0 None 80FE1E20 1B7A184 Small 1 54 11 11 201 Et0/0 None 80FE202C 1B7A2C4 Small 1 54 11 11 201 Et0/0 None 80FE2238 1B7A404 Small 1 54 11 11 201 Et0/0 None 81107F40 1B9B1E4 Small 1 54 11 11 201 Et0/0 None 8110814C 1B9B324 Small 1 54 11 11 201 Et0/0 None 81108358 1B9B464 Small 1 54 11 11 201 Et0/0 None 81108564 1B9B5A4 Small 1 54 11 11 201 Et0/0 None 8110897C 1B9B824 Small 1 54 11 11 201 Et0/0 None 81108B88 1B9B964 Small 1 54 11 11 201 Et0/0 None 81108D94 1B9BAA4 Small 1 54 11 11 201 Et0/0 None 81108FA0 1B9BBE4 Small 1 54 11 11 201 Et0/0 None 811093B8 1B9BE64 Small 1 54 11 11 201 Et0/0 None 811095C4 1B9BFA4 Small 1 54 11 11 201 Et0/0 None 811097D0 1B9C0E4 Small 1 54 11 11 201 Et0/0 None 811099DC 1B9C224 Small 1 54 11 11 201 Et0/0 None 81109DF4 1B9C4A4 Small 1 54 11 11 201 Et0/0 None 8110A000 1B9C5E4 Small 1 54 11 11 201 Et0/0 None 8110A20C 1B9C724 Small 1 54 11 11 201 Et0/0 None 8110A418 1B9C864 Small 1 54 11 11 201 Et0/0 None 81121364 1B9CC24 Small 1 54 11 11 201 Et0/0 None 81121570 1B9CD64 Small 1 54 11 11 201 Et0/0 None 81121988 1B9CFE4 Small 1 54 11 11 201 Et0/0 None 81121B94 1B9D124 Small 1 54 11 11 201 Et0/0 None 81121FAC 1B9D3A4 Small 1 54 11 11 201 Et0/0 None 811221B8 1B9D4E4 Small 1 54 11 11 201 Et0/0 None 811225D0 1B9D764 Small 1 54 11 11 201 Et0/0 None 811227DC 1B9D8A4 Small 1 54 11 11 201 Et0/0 None 811229E8 1B9D9E4 Small 1 54 11 11 201 Et0/0 None 81122BF4 1B9DB24 Small 1 54 11 11 201 Et0/0 None Router#show buffers address 81122BF4 dump Buffer information for Small buffer at 0x81122BF4 data_area 0x1B9DB24, refcount 1, next 0x0, flags 0x201 linktype 11 (NOVELL), enctype 11 (NOVELL-ETHER), encsize 14, rxtype 7 if_input 0x80F57BE0 (Ethernet0/0), if_output 0x0 (None) inputtime 0x4CE2BFC, outputtime 0x0, oqnumber 65535 datagramstart 0x1B9DB6A, datagramsize 54, maximum size 260 mac_start 0x1B9DB6A, addr_start 0x1B9DB6A, info_start 0x0 network_start 0x1B9DB78, transport_start 0x0 source:BE200040.0060.09c3.f9fe socket 0453 destination: BE200040.ffff.ffff.ffff socket 0453 protocol 01 01B9DB20: 00000000 00000000 00000000 00000000 ................ 01B9DB30: 00000000 00000000 00000000 00000000 ................ 01B9DB40: 00000000 00000000 00000000 00000000 ................ 01B9DB50: 00000000 00000000 00000000 00000000 ................ 01B9DB60: 00000000 00000000 0000FFFF FFFFFFFF ................ 01B9DB70: 006009C3 F9FE0028 FFFF0028 0001BE20 .`.Cy~.(...(..> 01B9DB80: 0040FFFF FFFFFFFF 0453BE20 00400060 .@.......S> .@.` 01B9DB90: 09C3F9FE 04530001 00000040 06000200 .Cy~.S.....@.... 01B9DBA0: 00000000 00000000 00000000 00000000 ................ 01B9DBB0: 00000000 00000000 00000000 00000000 ................ 01B9DBC0: 00000000 00000000 00000000 00000000 ................ 01B9DBD0: 00000000 00000000 00000000 00000000 ................ 01B9DBE0: 00000000 00000000 00000000 00000000 ................ 01B9DBF0: 00000000 00000000 00000000 00000000 ................ 01B9DC00: 00000000 00000000 00000000 00000000 ................ 01B9DC10: 00000000 00000000 00000000 00000000 ................ 01B9DC20: 00000000 00 ..... Router#
如果无法识别缓冲区中的模式,请捕获show命令的输出(例如,show buffers old),并将其保存到文件(例如,buffers.log)中。然后,尝试在UNIX“grep”实用程序或类似工具的帮助下隔离模式。
grep linktype buffers.log linktype 11 (NOVELL), enctype 11 (NOVELL-ETHER), encsize 14, rxtype 7 linktype 11 (NOVELL), enctype 11 (NOVELL-ETHER), encsize 14, rxtype 7 linktype 11 (NOVELL), enctype 11 (NOVELL-ETHER), encsize 14, rxtype 7 linktype 11 (NOVELL), enctype 11 (NOVELL-ETHER), encsize 14, rxtype 7 linktype 11 (NOVELL), enctype 11 (NOVELL-ETHER), encsize 14, rxtype 7 linktype 11 (NOVELL), enctype 11 (NOVELL-ETHER), encsize 14, rxtype 7 linktype 11 (NOVELL), enctype 11 (NOVELL-ETHER), encsize 14, rxtype 7 linktype 11 (NOVELL), enctype 11 (NOVELL-ETHER), encsize 14, rxtype 7 linktype 11 (NOVELL), enctype 11 (NOVELL-ETHER), encsize 14, rxtype 7 linktype 11 (NOVELL), enctype 11 (NOVELL-ETHER), encsize 14, rxtype 7 linktype 11 (NOVELL), enctype 11 (NOVELL-ETHER), encsize 14, rxtype 7 linktype 11 (NOVELL), enctype 11 (NOVELL-ETHER), encsize 14, rxtype 7 linktype 11 (NOVELL), enctype 11 (NOVELL-ETHER), encsize 14, rxtype 7 linktype 0 (None), enctype 0 (None), encsize 0, rxtype 0 linktype 11 (NOVELL), enctype 11 (NOVELL-ETHER), encsize 14, rxtype 7 linktype 11 (NOVELL), enctype 11 (NOVELL-ETHER), encsize 14, rxtype 7 linktype 11 (NOVELL), enctype 11 (NOVELL-ETHER), encsize 14, rxtype 7 linktype 11 (NOVELL), enctype 11 (NOVELL-ETHER), encsize 14, rxtype 7 linktype 11 (NOVELL), enctype 11 (NOVELL-ETHER), encsize 14, rxtype 7 linktype 11 (NOVELL), enctype 11 (NOVELL-ETHER), encsize 14, rxtype 7 linktype 11 (NOVELL), enctype 11 (NOVELL-ETHER), encsize 14, rxtype 7 ... !--- Here you can clearly see a lot of NOVELL-related buffers.
!--- The problem seems to be with the IPX packets.
!--- You can check this through the wc -l (to count lines) command on a UNIX system. grep linktype buffers.log | wc -l 175 grep linktype buffers.log | grep NOVELL-ETHER | wc -l 153 !--- 153 out of 175 old buffers are IPX packets. Try to find out what
!--- type of packets they are with another grep command: grep socket buffers.log source:BE200040.0060.09c3.f9fe socket 0453 destination: BE200040.ffff.ffff.ffff socket 0453 protocol 01 source:BE200040.0060.09c3.f9fe socket 0453 destination: BE200040.ffff.ffff.ffff socket 0453 protocol 01 source:BE200040.0060.09c3.f9fe socket 0453 destination: BE200040.ffff.ffff.ffff socket 0453 protocol 01 source:BE200040.0060.09c3.f9fe socket 0453 destination: BE200040.ffff.ffff.ffff socket 0453 protocol 01 source:BE200040.0060.09c3.f9fe socket 0453 destination: BE200040.ffff.ffff.ffff socket 0453 protocol 01 source:BE200040.0060.09c3.f9fe socket 0453 destination: BE200040.ffff.ffff.ffff socket 0453 protocol 01 source:BE200040.0060.09c3.f9fe socket 0453 destination: BE200040.ffff.ffff.ffff socket 0453 protocol 01 source:BE200040.0060.09c3.f9fe socket 0453 ... !--- There are Broadcasts to socket 453, protocol 01...
!--- Those are IPX RIP packets.
!--- Disable IPX RIP, or use IPX EIGRP instead, until a bug fix is available.
小结:
验证是否出现缓冲区泄漏。
缓冲区泄漏通常被误解为突发流量(许多数据包由于配置不正确或功能不受支持而进入进程交换)或攻击。
缓冲区泄漏是Cisco IOS软件Bug。解决此问题的最佳解决方案是将Cisco IOS软件升级到最新版本。
如果失败,请与Cisco TAC联系,并为工程师提供相关show buffers和show tech-support命令的输出。
版本 | 发布日期 | 备注 |
---|---|---|
1.0 |
10-Dec-2001 |
初始版本 |