Cisco
Cisco IOS：僅在命令行上記錄調試消息
我想要一個安靜的命令行，例如
(config)# no logging console原因。不過，我想使用# debug命令。在我看來，這# debug取決於系統日誌級別 7。所以我不能有一個安靜的 CLI 並同時閱讀調試消息。有解決方法嗎？
Host(config)#logging ? Hostname or A.B.C.D IP address of the logging host buffered Set buffered logging parameters buginf Enable buginf logging for debugging cns-events Set CNS Event logging level console Set console logging parameters count Count every log message and timestamp last occurrence discriminator Create or modify a message discriminator dmvpn DMVPN Configuration esm Set ESM filter restrictions exception Limit size of exception flush output facility Facility parameter for syslog messages filter Specify logging filter history Configure syslog history table host Set syslog server IP address and parameters message-counter Configure log message to include certain counter value monitor Set terminal line (monitor) logging parameters on Enable logging to all enabled destinations origin-id Add origin ID to syslog messages persistent Set persistent logging parameters queue-limit Set logger message queue size rate-limit Set messages per second limit reload Set reload logging level server-arp Enable sending ARP requests for syslog servers when first configured source-interface Specify interface for source address in logging transactions trap Set syslog server logging level userinfo Enable logging of user info on privileged mode enabling Host(config)#logging console ? <0-7> Logging severity level alerts Immediate action needed (severity=1) critical Critical conditions (severity=2) debugging Debugging messages (severity=7) discriminator Establish MD-Console association emergencies System is unusable (severity=0) errors Error conditions (severity=3) filtered Enable filtered logging guaranteed Guarantee console messages informational Informational messages (severity=6) notifications Normal but significant conditions (severity=5) warnings Warning conditions (severity=4) xml Enable logging in XML <cr>使用cpt_fink解決方案的範例：
之後
logging console critical和logging buffered 64000 debug之後：clear log_HostHost#show log Syslog logging: enabled (12 messages dropped, 0 messages rate-limited, 0 flushes, 0 overruns, xml disabled, filtering disabled) No Active Message Discriminator. No Inactive Message Discriminator. Console logging: level critical, 20 messages logged, xml disabled, filtering disabled Monitor logging: level debugging, 0 messages logged, xml disabled, filtering disabled Buffer logging: level debugging, 4 messages logged, xml disabled, filtering disabled Logging Exception size (4096 bytes) Count and timestamp logging messages: disabled Persistent logging: disabled No active filter modules. ESM: 0 messages dropped Trap logging: level informational, 36 message lines logged Log Buffer (64000 bytes): Host# Host# Host#debug ip icmp ICMP packet debugging is on Host# Host# Host#configure terminal Enter configuration commands, one per line. End with CNTL/Z. Host(config)# Host(config)#interface fastethernet0/1 Host(config-if)# Host(config-if)#ip address 192.168.0.1 255.255.255.0 Host(config-if)# Host(config-if)#no shut Host(config-if)#end Host# Host# Host#show log Syslog logging: enabled (12 messages dropped, 0 messages rate-limited, 0 flushes, 0 overruns, xml disabled, filtering disabled) No Active Message Discriminator. No Inactive Message Discriminator. Console logging: level critical, 20 messages logged, xml disabled, filtering disabled Monitor logging: level debugging, 0 messages logged, xml disabled, filtering disabled Buffer logging: level debugging, 5 messages logged, xml disabled, filtering disabled Logging Exception size (4096 bytes) Count and timestamp logging messages: disabled Persistent logging: disabled No active filter modules. ESM: 0 messages dropped Trap logging: level informational, 37 message lines logged Log Buffer (64000 bytes): Nov 4 18:03:05.551: %SYS-5-CONFIG_I: Configured from console by console Host#讓我們觸發一個 ICMP 調試消息。
Host_2#ping 192.168.0.1 repeat 1 Type escape sequence to abort. Sending 1, 100-byte ICMP Echos to 192.168.0.1, timeout is 2 seconds: . Success rate is 0 percent (0/1) Host_2# Host_2# Host_2#ping 192.168.0.1 repeat 1 Type escape sequence to abort. Sending 1, 100-byte ICMP Echos to 192.168.0.1, timeout is 2 seconds: ! Success rate is 100 percent (1/1), round-trip min/avg/max = 12/12/12 ms Host_2#讓我們查找系統日誌：
Host#show log Syslog logging: enabled (12 messages dropped, 0 messages rate-limited, 0 flushes, 0 overruns, xml disabled, filtering disabled) No Active Message Discriminator. No Inactive Message Discriminator. Console logging: level critical, 20 messages logged, xml disabled, filtering disabled Monitor logging: level debugging, 0 messages logged, xml disabled, filtering disabled Buffer logging: level debugging, 6 messages logged, xml disabled, filtering disabled Logging Exception size (4096 bytes) Count and timestamp logging messages: disabled Persistent logging: disabled No active filter modules. ESM: 0 messages dropped Trap logging: level informational, 37 message lines logged Log Buffer (64000 bytes): Nov 4 18:03:05.551: %SYS-5-CONFIG_I: Configured from console by console Nov 4 18:04:47.527: ICMP: echo reply sent, src 192.168.0.1, dst 192.168.0.2 Host#讓我們發出通常會導致煩人消息的命令：
Host#configure terminal Enter configuration commands, one per line. End with CNTL/Z. Host(config)# Host(config)#interface fastethernet0/0 Host(config-if)# Host(config-if)#shut Host(config-if)# Host(config-if)#exit Host(config)# Host(config)# Host(config)#interface fastethernet0/1 Host(config-if)# Host(config-if)#shut Host(config-if)# Host(config-if)#exit Host(config)# Host(config)#end Host#讓我們查找系統日誌：
Host#show log Syslog logging: enabled (12 messages dropped, 0 messages rate-limited, 0 flushes, 0 overruns, xml disabled, filtering disabled) No Active Message Discriminator. No Inactive Message Discriminator. Console logging: level critical, 20 messages logged, xml disabled, filtering disabled Monitor logging: level debugging, 0 messages logged, xml disabled, filtering disabled Buffer logging: level debugging, 11 messages logged, xml disabled, filtering disabled Logging Exception size (4096 bytes) Count and timestamp logging messages: disabled Persistent logging: disabled No active filter modules. ESM: 0 messages dropped Trap logging: level informational, 42 message lines logged Log Buffer (64000 bytes): Nov 4 18:03:05.551: %SYS-5-CONFIG_I: Configured from console by console Nov 4 18:04:47.527: ICMP: echo reply sent, src 192.168.0.1, dst 192.168.0.2 Nov 4 18:11:57.371: %LINK-5-CHANGED: Interface FastEthernet0/0, changed state to administratively down Nov 4 18:11:58.371: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to down Nov 4 18:12:07.619: %LINK-5-CHANGED: Interface FastEthernet0/1, changed state to administratively down Nov 4 18:12:08.619: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to down Nov 4 18:12:36.111: %SYS-5-CONFIG_I: Configured from console by console Host#
- 我喜歡什麼：我可以在 CLI 上工作而不會中斷。
- 我不喜歡的：我仍然收到未記錄的消息
debug ip icmp。使用cpt_fink的解決方案標記為正確答案的範例：
配置：
Router_1#configure terminal Enter configuration commands, one per line. End with CNTL/Z. Router_1(config)# Router_1(config)#logging console Router_1(config)# Router_1(config)#logging console critical Router_1(config)# Router_1(config)#logging buffered 64000 debug Router_1(config)# Router_1(config)#do clock set 07:29:30 5 november 2014 Router_1(config)# Router_1(config)#end Router_1# Router_1#debug ip icmp ICMP packet debugging is on Router_1#讓我們創建至少一條消息：
Router_2#ping 192.168.0.1 repeat 2 Type escape sequence to abort. Sending 2, 100-byte ICMP Echos to 192.168.0.1, timeout is 2 seconds: !! Success rate is 100 percent (2/2), round-trip min/avg/max = 4/4/4 ms Router_2#讓我們查找系統日誌：
Router_1#show logging | include ICMP Nov 5 07:30:05.463: ICMP: echo reply sent, src 192.168.0.1, dst 192.168.0.2 Nov 5 07:30:05.467: ICMP: echo reply sent, src 192.168.0.1, dst 192.168.0.2 Router_1#讓我們挑起更多消息：
Router_2#ping 192.168.0.1 repeat 11 Type escape sequence to abort. Sending 11, 100-byte ICMP Echos to 192.168.0.1, timeout is 2 seconds: !!!!!!!!!!! Success rate is 100 percent (11/11), round-trip min/avg/max = 4/4/4 ms Router_2#讓我們查找系統日誌：
Router_1#show logging | include ICMP Nov 5 07:30:05.463: ICMP: echo reply sent, src 192.168.0.1, dst 192.168.0.2 Nov 5 07:30:05.467: ICMP: echo reply sent, src 192.168.0.1, dst 192.168.0.2 Nov 5 07:32:24.807: ICMP: echo reply sent, src 192.168.0.1, dst 192.168.0.2 Nov 5 07:32:24.811: ICMP: echo reply sent, src 192.168.0.1, dst 192.168.0.2 Nov 5 07:32:24.815: ICMP: echo reply sent, src 192.168.0.1, dst 192.168.0.2 Nov 5 07:32:24.819: ICMP: echo reply sent, src 192.168.0.1, dst 192.168.0.2 Nov 5 07:32:24.823: ICMP: echo reply sent, src 192.168.0.1, dst 192.168.0.2 Nov 5 07:32:24.827: ICMP: echo reply sent, src 192.168.0.1, dst 192.168.0.2 Nov 5 07:32:24.831: ICMP: echo reply sent, src 192.168.0.1, dst 192.168.0.2 Nov 5 07:32:24.835: ICMP: echo reply sent, src 192.168.0.1, dst 192.168.0.2 Nov 5 07:32:24.839: ICMP: echo reply sent, src 192.168.0.1, dst 192.168.0.2 Nov 5 07:32:24.843: ICMP: echo reply sent, src 192.168.0.1, dst 192.168.0.2 Nov 5 07:32:24.847: ICMP: echo reply sent, src 192.168.0.1, dst 192.168.0.2 Router_1#
我建議您使用該命令查看歷史輸出，
logging console critical而不會用消息阻塞低速物理控制台，同時仍會在控制台上接收關鍵或更高級別的消息。logging buffered 64000 debug``sho log在使用日誌緩衝區時，正確設置系統時間（使用 NTP 或
clock set ...來自 exec）和時區/夏令時clock timezone XXX -#以及clock summer-time XXX recurring使用service timestamps log datetime local ms和service timestamps debug date local ms命令在輸出消息時標記消息也很有用。作為旁注
terminal monitor（並terminal no monitor禁用它）是一種在遠端連接時立即獲得輸出的方法。您可以將 設置logging monitor [level]為包含調試或僅包含更高重要性的消息。