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緩衝區洩漏是Cisco IOS®軟體漏洞。緩衝區洩漏有兩種型別:
楔形介面緩衝區洩漏。
系統緩衝區洩漏。
為了排除緩衝區洩漏故障,您必須確定遇到的緩衝區洩漏型別。show interfaces和show buffers命令在這種情況下非常有用。
如果從Cisco裝置中獲得show interfaces 和show buffers 命令的輸出,則可使用Cisco CLI Analyzer顯示潛在問題和解決方法。要使用思科CLI分析器,您必須是註冊客戶、已登入並已啟用JavaScript。
本文件沒有特定需求。
本文件所述內容不限於特定軟體和硬體版本。
本文中的資訊是根據特定實驗室環境內的裝置所建立。文中使用到的所有裝置皆從已清除(預設)的組態來啟動。如果您的網路正在作用,請確保您已瞭解任何指令可能造成的影響。
如需文件慣例的詳細資訊,請參閱思科技術提示慣例。
楔形介面緩衝區洩漏會導致介面的輸入隊列充滿,使隊列無法再接收資料包。在某些特定的流量條件下,介面上的輸入隊列會變得被塞滿,或者換句話說,輸入隊列計數大於隊列深度。
以下是show interfaces命令輸出的示例,其中顯示介面被塞滿:
Ethernet0/0 is up, line protocol is up Output queue 0/40, 0 drops; input queue 76/75, 1250 drops
此類緩衝區洩漏的症狀是輸入隊列已滿(76/75)。在這裡,值76和75分別表示輸入隊列中的資料包數以及輸入隊列的最大大小。在這種情況下,輸入隊列中的資料包數大於隊列深度。這稱為「楔形介面」。當介面被楔入時,路由器不再轉發來自受影響介面的流量。
重新載入路由器以釋放輸入隊列並恢復流量,直到隊列再次充滿。根據洩漏的嚴重程度,這可能需要幾秒到幾週的時間。
注意:在重新載入路由器之前,請確保收集所有必要資訊以辨識罪魁禍首。
使用以下命令確定緩衝區洩漏的來源:
show buffers pool [pool name] [packet/header]
show buffers old (僅在啟用debug sanity的情況下使用此命令。
注意:在大多數思科IOS軟體版本中,debug sanity命令是隱藏的。在啟用debug sanity的情況下,會在分配系統中使用的每個緩衝區時對其進行健全性檢查,並在釋放該緩衝區時再次進行健全性檢查。
註:您必須在特權EXEC模式(啟用模式)下發出debug sanity命令。雖然此命令使用某些CPU容量,但不會嚴重影響路由器的功能。與其他debug命令一樣,debug sanity不儲存在配置中。因此,此指令在系統重新開機時無法運作。
注意:要停用健全性檢查,請使用特權執行命令undebug sanity。)
show buffer assigned
本節討論系統緩衝區洩漏。
以下是show buffers命令輸出的示例,它顯示一個系統緩衝池中存在緩衝漏出:
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命令輸出表示緩衝池中存在緩衝漏出。路由器中總共有20825個中間緩衝區,而可用清單中只有286個。這意味著某些進程會佔用所有緩衝區,但不會返回它們。
此類緩衝區洩漏的其他症狀包括池處理器或基於平台的輸入/輸出(I/O)的「%SYS-2-MALLOCFAIL」錯誤消息。
使用以下命令確定緩衝區洩漏的來源:
show buffers old (僅在啟用debug sanity的情況下使用此命令。
注意:在大多數思科IOS軟體版本中,debug sanity命令是隱藏的。在啟用debug sanity的情況下,會在分配系統中使用的每個緩衝區時對其進行健全性檢查,並在釋放該緩衝區時再次進行健全性檢查。
註:您必須在特權EXEC模式(啟用模式)下發出debug sanity命令。雖然此命令使用某些CPU容量,但不會嚴重影響路由器的功能。與其他debug命令一樣,debug sanity不儲存在配置中。因此,此指令在系統重新開機時無法運作。
注意:要停用健全性檢查,請使用特權執行命令undebug sanity。)
show buffers pool [pool name] [packet/header]
show buffer assigned
緩衝區洩漏是Cisco IOS軟體錯誤。若要修正已知的緩衝區洩漏錯誤,請升級至版本系列中的最新版本。例如,如果您目前執行Cisco IOS軟體版本11.2(14),請升級至最新的11.2(x)映像。如果沒有收到效果或者無法升級路由器,請與Cisco TAC聯絡,並為工程師提供相關show buffers命令的輸出,以及show tech-support命令的輸出。
以下是幫助您辨識導致緩衝區洩漏的資料包的一些提示:
當您檢測到緩衝漏出時,使用相關的show buffers命令找到佔用過多緩衝的資料包模式。
當您辨識封包的型別時,請嘗試提出解決方案以防止洩漏(例如,使用存取清單來篩選這些封包)。
以下是相關show命令的輸出示例:
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#
如果無法辨識緩衝區中的模式,請捕獲show命令的輸出(例如,show buffers old),並將其儲存到檔案(例如buffers.log)中。然後,嘗試在UNIX「grep」實用程式或類似程式的幫助下隔離模式。
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.
總之:
驗證您是否出現緩衝區洩漏。
緩衝區洩漏通常被誤解為流量突發(許多資料包由於配置不正確或功能不受支援而進入進程交換)或攻擊。
緩衝區洩漏是Cisco IOS軟體錯誤。此問題的最佳解決方案是將Cisco IOS軟體升級到最新版本。
如果失敗,請與Cisco TAC聯絡,並為工程師提供相關show buffers和show tech-support命令的輸出。
修訂 | 發佈日期 | 意見 |
---|---|---|
1.0 |
10-Dec-2001 |
初始版本 |