Blog-boxcorea

8월 07

ubuntu server 18.04 LTS 에 apache2, django, mod_wsgi 설치

By snowffox in Application(어플리케이션)

ubuntu server 18.04 LTS 에 apache2, django, mod_wsgi 설치

우분투서버는 최초 설치한 상태.

1. ubuntu 18.04에는 python3.6.5가 설치되어 있다. 이 버전을 그냥 사용하기위해 아래 명령어로 아파치웹서버와 mod_wsgi를 설치한다.

snowfox@fox:~$ sudo apt-get install python3-pip apache2 libapache2-mod-wsgi-py3

1	snowfox@fox:~$ sudo apt-get install python3-pip apache2 libapache2-mod-wsgi-py3

2. 파이썬 virtual environment를 설정한다.

파이썬 virtual environment를 사용하기 위해 virtualenv를 설치한다.

snowfox@fox:~$ sudo pip3 install virtualenv
Collecting virtualenv
  Downloading https://files.pythonhosted.org/packages/b6/30/96a02b2287098b23b875bc8c2f58071c35d2efe84f747b64d523721dc2b5/virtualenv-16.0.0-py2.py3-none-any.whl (1.9MB)
    100% |████████████████████████████████| 1.9MB 711kB/s
Installing collected packages: virtualenv
Successfully installed virtualenv-16.0.0

snowfox@fox:~$ sudo pip3 install virtualenv

Collecting virtualenv

Downloading https://files.pythonhosted.org/packages/b6/30/96a02b2287098b23b875bc8c2f58071c35d2efe84f747b64d523721dc2b5/virtualenv-16.0.0-py2.py3-none-any.whl (1.9MB)

100% |████████████████████████████████| 1.9MB 711kB/s

Installing collected packages: virtualenv

Successfully installed virtualenv-16.0.0

7월 11

apache2 , AH00023 에러.

By snowffox in Application(어플리케이션)

CentOS 7에서 apache2 재실행 했을때 아래 오류 발생.

[Wed Jul 04 12:15:03.580995 2018] [core:emerg] [pid 22739] (28)No space left on device: AH00023: Couldn't create the rewrite-map mutex
AH00016: Configuration Failed

1 2	[Wed Jul 04 12:15:03.580995 2018] [core:emerg] [pid 22739] (28)No space left on device: AH00023: Couldn't create the rewrite-map mutex AH00016: Configuration Failed

아래 문서에 의하면, 공유메모리(shared memory)나 세마포(semaphore)같은 리소스가 부족해서 발생한다고 한다. 관련 커널 파라메터를 수정하는 방법과, 아파치 프로세스에 의해 남은 semaphore를 ipcrm 명령어로 삭제하면 된다.(처리는 참고 문서를 참고. 과정을 캡쳐하지 못했음…)

6월 18

[python script] 스위치 설정 저장

By snowffox in ETC(기타)

파이썬 스크립트를 이용한 스위치 설정 정보 저장.(Cisco, extreme)

지원 스위치: Cisco IOS , Extreme EXOS 스위치
지원 프로토콜: telnet, ssh (익스트림 스위치 제외).
스크립트 실행 환경: python 3.6.5, netmiko, telnetlib가 필요하다.

스위치 접속 정보화일(switch.txt)은 아래와 같은 포맷이며, 각 열은 탭(\t) 하나로 구분한다.

# IP		PORT	USER	PASSWD		PROTOCOL	VENDOR
172.16.10.1	23 	admin	password1	telnet	cisco
172.16.10.2	22	root	password2	ssh	cisco
172.16.10.3	23	admin	password3	telnet	extreme

# IP PORT USER PASSWD PROTOCOL VENDOR

172.16.10.1 23 admin password1 telnet cisco

172.16.10.2 22 root password2 ssh cisco

172.16.10.3 23 admin password3 telnet extreme

5월 29

익스트림 스위치에서 비인가 DHCP(Rogue DHCP) 서버 차단하기.

By snowffox in Network(네트워크)

익스트림 스위치 EXOS 에서 비인가 DHCP(Rogue DHCP) 서버 차단하기.

Rogue DHCP 차단은 cisco 스위치의 rogue dhcp 서버 차단과 같은 dhcp snooping 설정을 하면 된다. 시스코 스위치의 설정은 이전 글 https://blog.boxcorea.com/wp/archives/2258을 참고.

먼저, dhcp snooping 설정을 확인해 본다.

Switch.2 # show ip-security dhcp-snooping vlan V210

Trusted Ports: None
Trusted DHCP Servers: None
Bindings Restoration     : Disabled
Bindings Filename        :
Bindings File Location   :
         Primary Server  : None
         Secondary Server: None
Bindings Write Interval  : 30 minutes

------------------------------------
Port            Violation-action
------------------------------------

Switch.2 # show ip-security dhcp-snooping vlan V210

Trusted Ports: None

Trusted DHCP Servers: None

Bindings Restoration : Disabled

Bindings Filename :

Bindings File Location :

Primary Server : None

Secondary Server: None

Bindings Write Interval : 30 minutes

------------------------------------

Port Violation-action

------------------------------------

위 결과를 보면, dhcp snooping은 설정되어 있지 않다.
Continue reading

5월 29

시스코 스위치 link-flap 에러 처리

By snowffox in Network(네트워크)

시스코 스위치 link-flap 에러 처리

상태 : C3550 스위치 포트가 link-flap 에러를 감지하고, 포트 상태를 err-disabled 상태로 변경함. 39번 포트에 연결된 장비는 통신이 안되는 상황 발생.
link-flap 은 인터페이스(스위치포트)가 up/down 을 반복하는 것을 의미한다.

먼저, 스위치 로그를 확인해 본다.

Switch #show log
...
May 28 07:38:16: %LINK-3-UPDOWN: Interface FastEthernet0/39, changed state to up
May 28 07:38:18: %PM-4-ERR_DISABLE: link-flap error detected on Fa0/39, putting Fa0/39 in err-disable state
May 28 07:38:18: %LINK-3-UPDOWN: Interface FastEthernet0/39, changed state to down

...

Switch #show log

...

May 28 07:38:16: %LINK-3-UPDOWN: Interface FastEthernet0/39, changed state to up

May 28 07:38:18: %PM-4-ERR_DISABLE: link-flap error detected on Fa0/39, putting Fa0/39 in err-disable state

May 28 07:38:18: %LINK-3-UPDOWN: Interface FastEthernet0/39, changed state to down

...

5월 23

시스코 스위치에서 Rogue DHCP 서버 차단하기.

By snowffox in Network(네트워크)

Cisco 스위치에서 Rogue DHCP(허가받지 않은 DHCP)서버차단.

이상증상: PC에 고정 IP를 설정하였으나, ipconfig 명령으로 확인해 보면 IP주소가 설정한대로 바뀌지 않고, 특정 IP주소로 설정되어 통신 안되는 현상 발생햇다. IP공유기의 LAN포트가 스위치에 연결되어 있어 IP공유기가 DHCP서버(Rogue DHCP)로 동작하는것으로 추정되지만 확인 불가능. PC는 시스코 스위치(C3550)에 연결되어 있다. 이에 스위치에서 Rogue DHCP를 차단하기로 함.

스위치에서 dhcp를 차단하기위해서는 dhcp snooping기능을 활성화 하면 된다. 먼저, 아래처럼 dhcp snooping 기능이 동작중인지 확인해 본다.

Switch #show ip dhcp snooping 
Switch DHCP snooping is disabled
DHCP snooping is configured on following VLANs:
none
DHCP snooping is operational on following VLANs:
none
DHCP snooping is configured on the following L3 Interfaces:

Insertion of option 82 is enabled
   circuit-id format: vlan-mod-port
    remote-id format: MAC
Option 82 on untrusted port is not allowed
Verification of hwaddr field is enabled
Verification of giaddr field is enabled
DHCP snooping trust/rate is configured on the following Interfaces:

Interface                    Trusted     Rate limit (pps)
------------------------     -------     ----------------


Switch #show ip dhcp snooping statistics 
 Packets Forwarded                                     = 0
 Packets Dropped                                       = 0
 Packets Dropped From untrusted ports                  = 0

Switch #show ip dhcp snooping

Switch DHCP snooping is disabled

DHCP snooping is configured on following VLANs:

none

DHCP snooping is operational on following VLANs:

none

DHCP snooping is configured on the following L3 Interfaces:

Insertion of option 82 is enabled

circuit-id format: vlan-mod-port

remote-id format: MAC

Option 82 on untrusted port is not allowed

Verification of hwaddr field is enabled

Verification of giaddr field is enabled

DHCP snooping trust/rate is configured on the following Interfaces:

Interface Trusted Rate limit (pps)

------------------------ ------- ----------------

Switch #show ip dhcp snooping statistics

Packets Forwarded = 0

Packets Dropped = 0

Packets Dropped From untrusted ports = 0

위의 결과를 보면, DHCP snooping 기능이 중지되어 있는 것을 알 수 있다.
Continue reading

5월 14

익스트림 스위치 CPU 점유문제.

By snowffox in Network(네트워크)

익스트림 스위치 CPU 점유문제를 확인하고 해결한 방법.

모델: Extreme X430-48t
이상 증상: CPU 0% IDLE. 응답시간이 길어지는 현상 발생

top 명령으로 리소스 사용량을 확인해보니, 아래처럼, 0.0% idle, bcmRX, tbcm_msm_txX 프로세스의 CPU 점유율이 높다.

Switch.1 # top
Mem: 193584K used, 61432K free, 0K shrd, 0K buff, 78476K cached
CPU:  0.0% usr 20.0% sys  0.0% nic  0.0% idle  0.0% io  0.0% irq 80.0% sirq
Load average: 7.42 7.58 7.38 4/152 1532
  PID  PPID USER     STAT   RSS %MEM CPU %CPU COMMAND
 1110     2 root     RW       0  0.0   0 42.1 [bcmRX]
 1107     2 root     DW<      0  0.0   0 42.1 [tbcm_msm_tx1]
 1532  1531 root     R      648  0.2   0 10.5 top -d 3 
 1105     2 root     DW<      0  0.0   0  5.2 [tbcm_msm_tx0]
 1262     1 root     S    12224  4.7   0  0.0 ./cliMaster 
 1240     1 root     S <  10440  4.0   0  0.0 ./hal 
 1333     1 root     S     5760  2.2   0  0.0 ./netTools 
 1342     1 root     S     5296  2.0   0  0.0 ./etmon 
 1269     1 root     S     4816  1.8   0  0.0 ./snmpMaster 
 1358     1 root     S     4688  1.8   0  0.0 ./xmld 
 1271     1 root     S     4100  1.6   0  0.0 ./snmpSubagent 
 1371     1 root     S     4064  1.5   0  0.0 ./idMgr 
 1282     1 root     S     3964  1.5   0  0.0 ./aaa -t random 
 1320     1 root     S     3800  1.4   0  0.0 ./rtmgr update 
 1236     1 root     S     3416  1.3   0  0.0 ./emsServer 
 1326     1 root     S     3376  1.3   0  0.0 ./mcmgr 
 1286     1 root     S     3332  1.3   0  0.0 ./vlan 
 1288     1 root     S     3060  1.2   0  0.0 ./fdb 
 1330     1 root     S     2964  1.1   0  0.0 ./acl 
 1344     1 root     S     2720  1.0   0  0.0 ./thttpd 
 1264     1 root     S     2560  1.0   0  0.0 ./cfgmgr 
 1310     1 root     S     2532  0.9   0  0.0 ./stp 
 1376     1 root     S     2528  0.9   0  0.0 ./erps 
 1366     1 root     S     2496  0.9   0  0.0 ./dot1ag 
 1383     1 root     S     2420  0.9   0  0.0 ./exsshd 
 1303     1 root     S     2400  0.9   0  0.0 ./eaps 
  947     1 root     S     2384  0.9   0  0.0 /exos/bin/epm -t 40 -f /exos/config/epmrc.L2 -d /exos/config/epmdprc 
 1335     1 root     S     2368  0.9   0  0.0 ./netLogin 
 1360     1 root     S     2316  0.9   0  0.0 ./xmlc 
 1305     1 root     S     2284  0.8   0  0.0 ./esrp 
 1339     1 root     S     2244  0.8   0  0.0 ./telnetd -e 
 1378     1 root     S <   2240  0.8   0  0.0 ./mrp 
 1299     1 root     S     2216  0.8   0  0.0 ./lldp 
 1362     1 root     S     2212  0.8   0  0.0 ./ipSecurity 
 1337     1 root     S     2200  0.8   0  0.0 ./techSupport 
 1364     1 root     S     2168  0.8   0  0.0 ./upm 
 1352     1 root     S     2132  0.8   0  0.0 ./poe 
 1297     1 root     S     2124  0.8   0  0.0 ./edp 
 1290     1 root     S     2116  0.8   0  0.0 ./elrp 
 1301     1 root     S     2112  0.8   0  0.0 ./lacp 
 1368     1 root     S     2056  0.8   0  0.0 ./hclag 
 1292     1 root     R     2000  0.7   0  0.0 ./elsm 
 1238     1 root     S     1948  0.7   0  0.0 ./devmgr

Switch.1 # top

Mem: 193584K used, 61432K free, 0K shrd, 0K buff, 78476K cached

CPU: 0.0% usr 20.0% sys 0.0% nic 0.0% idle 0.0% io 0.0% irq 80.0% sirq

Load average: 7.42 7.58 7.38 4/152 1532

PID PPID USER STAT RSS %MEM CPU %CPU COMMAND

1110 2 root RW 0 0.0 0 42.1 [bcmRX]

1107 2 root DW< 0 0.0 0 42.1 [tbcm_msm_tx1]

1532 1531 root R 648 0.2 0 10.5 top -d 3

1105 2 root DW< 0 0.0 0 5.2 [tbcm_msm_tx0]

1262 1 root S 12224 4.7 0 0.0 ./cliMaster

1240 1 root S < 10440 4.0 0 0.0 ./hal

1333 1 root S 5760 2.2 0 0.0 ./netTools

1342 1 root S 5296 2.0 0 0.0 ./etmon

1269 1 root S 4816 1.8 0 0.0 ./snmpMaster

1358 1 root S 4688 1.8 0 0.0 ./xmld

1271 1 root S 4100 1.6 0 0.0 ./snmpSubagent

1371 1 root S 4064 1.5 0 0.0 ./idMgr

1282 1 root S 3964 1.5 0 0.0 ./aaa -t random

1320 1 root S 3800 1.4 0 0.0 ./rtmgr update

1236 1 root S 3416 1.3 0 0.0 ./emsServer

1326 1 root S 3376 1.3 0 0.0 ./mcmgr

1286 1 root S 3332 1.3 0 0.0 ./vlan

1288 1 root S 3060 1.2 0 0.0 ./fdb

1330 1 root S 2964 1.1 0 0.0 ./acl

1344 1 root S 2720 1.0 0 0.0 ./thttpd

1264 1 root S 2560 1.0 0 0.0 ./cfgmgr

1310 1 root S 2532 0.9 0 0.0 ./stp

1376 1 root S 2528 0.9 0 0.0 ./erps

1366 1 root S 2496 0.9 0 0.0 ./dot1ag

1383 1 root S 2420 0.9 0 0.0 ./exsshd

1303 1 root S 2400 0.9 0 0.0 ./eaps

947 1 root S 2384 0.9 0 0.0 /exos/bin/epm -t 40 -f /exos/config/epmrc.L2 -d /exos/config/epmdprc

1335 1 root S 2368 0.9 0 0.0 ./netLogin

1360 1 root S 2316 0.9 0 0.0 ./xmlc

1305 1 root S 2284 0.8 0 0.0 ./esrp

1339 1 root S 2244 0.8 0 0.0 ./telnetd -e

1378 1 root S < 2240 0.8 0 0.0 ./mrp

1299 1 root S 2216 0.8 0 0.0 ./lldp

1362 1 root S 2212 0.8 0 0.0 ./ipSecurity

1337 1 root S 2200 0.8 0 0.0 ./techSupport

1364 1 root S 2168 0.8 0 0.0 ./upm

1352 1 root S 2132 0.8 0 0.0 ./poe

1297 1 root S 2124 0.8 0 0.0 ./edp

1290 1 root S 2116 0.8 0 0.0 ./elrp

1301 1 root S 2112 0.8 0 0.0 ./lacp

1368 1 root S 2056 0.8 0 0.0 ./hclag

1292 1 root R 2000 0.7 0 0.0 ./elsm

1238 1 root S 1948 0.7 0 0.0 ./devmgr

5월 11

Cisco C4507 스위치 CPU 점유율 상승 문제.

By snowffox in Network(네트워크)

시스코 C4507의 CPU 사용율이 갑자기 70%이상 증가(평소 20% 수준)하는 현상 발생

1. show process cpu 명령으로 어떤 프로세스가 CPU를 많이 점유하는지 확인한다.

switch#sh processes cpu
CPU utilization for five seconds: 73%/12%; one minute: 70%; five minutes: 71%
 PID Runtime(ms)   Invoked      uSecs   5Sec   1Min   5Min TTY Process 
   1    12146602  11934173       1017  0.00%  0.00%  0.00%   0 Chunk Manager    
   2        1708   1193302          1  0.00%  0.00%  0.00%   0 Load Meter       
   3      176742   4199199         42  0.07%  0.01%  0.00%   0 OSPF-100 Hello   
   4           0         1          0  0.00%  0.00%  0.00%   0 Deferred Events  
   5           0         1          0  0.00%  0.00%  0.00%   0 Retransmission o 
   6           0         1          0  0.00%  0.00%  0.00%   0 IPC ISSU Receive 
   7    11041033   1026095      10760  0.00%  0.12%  0.15%   0 Check heaps      
   8           4         3       1333  0.00%  0.00%  0.00%   0 Pool Manager     
   9           0         2          0  0.00%  0.00%  0.00%   0 Timers           
  10           0         2          0  0.00%  0.00%  0.00%   0 Serial Backgroun 
  11           0         1          0  0.00%  0.00%  0.00%   0 Crash writer     
  12          40        16       2500  0.00%  0.00%  0.00%   0 RF Slave Main Th 
  13           0         1          0  0.00%  0.00%  0.00%   0 ifIndex Receive  
  14     5270506  14388758        366  0.07%  0.09%  0.08%   0 ARP Input        
  15           0         1          0  0.00%  0.00%  0.00%   0 CEF MIB API      
  16           0         1          0  0.00%  0.00%  0.00%   0 AAA_SERVER_DEADT 
  17           0         2          0  0.00%  0.00%  0.00%   0 AAA high-capacit 
  18           0         1          0  0.00%  0.00%  0.00%   0 Policy Manager   
  19          24        16       1500  0.00%  0.00%  0.00%   0 Entity MIB API   
  20           0         1          0  0.00%  0.00%  0.00%   0 IFS Agent Manage 
  21        5545   1192214          4  0.00%  0.00%  0.00%   0 IPC Event Notifi 
  22       11173   5961063          1  0.07%  0.00%  0.00%   0 IPC Mcast Pendin 
  23        1272     99354         12  0.00%  0.00%  0.00%   0 IPC Dynamic Cach 
  24           0         1          0  0.00%  0.00%  0.00%   0 IPC Session Serv 
  25           0         1          0  0.00%  0.00%  0.00%   0 IPC Zone Manager 
  26        9578   5961062          1  0.00%  0.00%  0.00%   0 IPC Periodic Tim 
  27           0         1          0  0.00%  0.00%  0.00%   0 IPC Managed Time 
  28           0         1          0  0.00%  0.00%  0.00%   0 IPC Seat TX Cont 
  29        8716   5961062          1  0.00%  0.00%  0.00%   0 IPC Deferred Por 
  30           0         1          0  0.00%  0.00%  0.00%   0 IPC Seat Manager 
  31         148         3      49333  0.00%  0.00%  0.00%   0 PrstVbl          
  32           0         1          0  0.00%  0.00%  0.00%   0 client_entity_se 
  33           0         1          0  0.00%  0.00%  0.00%   0 SERIAL A'detect  
  34           0         1          0  0.00%  0.00%  0.00%   0 ARP Snoop        
  35       12830   5961062          2  0.00%  0.00%  0.00%   0 Dynamic ARP Insp 
  36        9860   5961035          1  0.07%  0.00%  0.00%   0 GraphIt          
  37           0         1          0  0.00%  0.00%  0.00%   0 Critical Bkgnd   
  38      184739    699124        264  0.00%  0.00%  0.00%   0 Net Background   
  39    24758040   5967099       4149  0.39%  0.40%  0.40%   0 IDB Work         
  40           0        19          0  0.00%  0.00%  0.00%   0 Logger           
  41       14158   5961031          2  0.00%  0.00%  0.00%   0 TTY Background   
  42       20736   5990497          3  0.00%  0.00%  0.00%   0 Per-Second Jobs  
  43     5570567    159187      34994  0.00%  0.10%  0.06%   0 Per-minute Jobs  
  44           8         9        888  0.00%  0.00%  0.00%   0 IF-MGR control p 
  45           4       165         24  0.00%  0.00%  0.00%   0 IF-MGR event pro 
  46           0         1          0  0.00%  0.00%  0.00%   0 ISSU PROCESS IPC 
  47           0         1          0  0.00%  0.00%  0.00%   0 PrstVbl IPC Msg  
  48           0         2          0  0.00%  0.00%  0.00%   0 cpf_msg_holdq_pr 
  49           0         1          0  0.00%  0.00%  0.00%   0 cpf_msg_rcvq_pro 
  50           0         2          0  0.00%  0.00%  0.00%   0 IP Host Track HA 
  51           0         3          0  0.00%  0.00%  0.00%   0 ARP HA           
  52           0         1          0  0.00%  0.00%  0.00%   0 IP Admission HA  
  53           0         1          0  0.00%  0.00%  0.00%   0 DHCPC HA         
  54           0         1          0  0.00%  0.00%  0.00%   0 DHCPD HA         
  55      126133  12179969         10  0.07%  0.02%  0.02%   0 DHCPD Receive    
  56           0         1          0  0.00%  0.00%  0.00%   0 Network-rf Notif 
  57   145785581 548208384        265  4.95%  4.72%  4.70%   0 Cat4k Mgmt HiPri 
  58   200986261 302192877        665 52.63% 51.87% 52.14%   0 Cat4k Mgmt LoPri 
  59       10265   1389304          7  0.00%  0.00%  0.00%   0 Galios Reschedul 
  60           0         2          0  0.00%  0.00%  0.00%   0 IOS ACL Helper   
  61           0         1          0  0.00%  0.00%  0.00%   0 GalRedMsgProc    
  62           0        16          0  0.00%  0.00%  0.00%   0 RF Master Main T 
  63           4         5        800  0.00%  0.00%  0.00%   0 RF Master Status 
  64           0       139          0  0.00%  0.00%  0.00%   0 Net Input        
  65     1521245   1246567       1220  0.00%  0.01%  0.00%   0 Compute load avg 
  66           0         1          0  0.00%  0.00%  0.00%   0 RFS server proce 
  67           0         1          0  0.00%  0.00%  0.00%   0 RTTYS Process    
  68           0         1          0  0.00%  0.00%  0.00%   0 IPC Apps Task    
  69        5978   5965434          1  0.00%  0.00%  0.00%   0 RedStateMonitor  
  70           4       101         39  0.00%  0.00%  0.00%   0 BACK CHECK       
  71           0         1          0  0.00%  0.00%  0.00%   0 AggMgr Process   
  72           0       278          0  0.00%  0.00%  0.00%   0 Transport Port A 
  73       64514   1265356         50  0.00%  0.00%  0.00%   0 HC Counter Timer 
  74           0         1          0  0.00%  0.00%  0.00%   0 SFF8472          
  75      120406    997517        120  0.00%  0.00%  0.00%   0 EEM ED ND        
  76           0         2          0  0.00%  0.00%  0.00%   0 EEM ED Identity  
  77           0         3          0  0.00%  0.00%  0.00%   0 EEM ED MAT       
  78           0         2          0  0.00%  0.00%  0.00%   0 Ethernet OAM Pro 
  79           0         1          0  0.00%  0.00%  0.00%   0 PPPOE IA         
  80           0         2          0  0.00%  0.00%  0.00%   0 REP Topology cha 
  81           8       115         69  0.00%  0.00%  0.00%   0 Auth Manager     
  82           0         1          0  0.00%  0.00%  0.00%   0 CMD HANDLER      
  83           0         2          0  0.00%  0.00%  0.00%   0 Dot1x Mgr Proces 
  84           0         1          0  0.00%  0.00%  0.00%   0 MAB Framework    
  85           0         1          0  0.00%  0.00%  0.00%   0 AUTH POLICY Fram 
  86           0         1          0  0.00%  0.00%  0.00%   0 802.1x Webauth F 
  87           8       101         79  0.00%  0.00%  0.00%   0 802.1x switch    
  88      409738   3136863        130  0.00%  0.00%  0.00%   0 DTP Protocol     
  89           0         1          0  0.00%  0.00%  0.00%   0 EAP Framework    
  90           0         1          0  0.00%  0.00%  0.00%   0 EAP Test

switch#sh processes cpu

CPU utilization for five seconds: 73%/12%; one minute: 70%; five minutes: 71%

PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process

1 12146602 11934173 1017 0.00% 0.00% 0.00% 0 Chunk Manager

2 1708 1193302 1 0.00% 0.00% 0.00% 0 Load Meter

3 176742 4199199 42 0.07% 0.01% 0.00% 0 OSPF-100 Hello

4 0 1 0 0.00% 0.00% 0.00% 0 Deferred Events

5 0 1 0 0.00% 0.00% 0.00% 0 Retransmission o

6 0 1 0 0.00% 0.00% 0.00% 0 IPC ISSU Receive

7 11041033 1026095 10760 0.00% 0.12% 0.15% 0 Check heaps

8 4 3 1333 0.00% 0.00% 0.00% 0 Pool Manager

9 0 2 0 0.00% 0.00% 0.00% 0 Timers

10 0 2 0 0.00% 0.00% 0.00% 0 Serial Backgroun

11 0 1 0 0.00% 0.00% 0.00% 0 Crash writer

12 40 16 2500 0.00% 0.00% 0.00% 0 RF Slave Main Th

13 0 1 0 0.00% 0.00% 0.00% 0 ifIndex Receive

14 5270506 14388758 366 0.07% 0.09% 0.08% 0 ARP Input

15 0 1 0 0.00% 0.00% 0.00% 0 CEF MIB API

16 0 1 0 0.00% 0.00% 0.00% 0 AAA_SERVER_DEADT

17 0 2 0 0.00% 0.00% 0.00% 0 AAA high-capacit

18 0 1 0 0.00% 0.00% 0.00% 0 Policy Manager

19 24 16 1500 0.00% 0.00% 0.00% 0 Entity MIB API

20 0 1 0 0.00% 0.00% 0.00% 0 IFS Agent Manage

21 5545 1192214 4 0.00% 0.00% 0.00% 0 IPC Event Notifi

22 11173 5961063 1 0.07% 0.00% 0.00% 0 IPC Mcast Pendin

23 1272 99354 12 0.00% 0.00% 0.00% 0 IPC Dynamic Cach

24 0 1 0 0.00% 0.00% 0.00% 0 IPC Session Serv

25 0 1 0 0.00% 0.00% 0.00% 0 IPC Zone Manager

26 9578 5961062 1 0.00% 0.00% 0.00% 0 IPC Periodic Tim

27 0 1 0 0.00% 0.00% 0.00% 0 IPC Managed Time

28 0 1 0 0.00% 0.00% 0.00% 0 IPC Seat TX Cont

29 8716 5961062 1 0.00% 0.00% 0.00% 0 IPC Deferred Por

30 0 1 0 0.00% 0.00% 0.00% 0 IPC Seat Manager

31 148 3 49333 0.00% 0.00% 0.00% 0 PrstVbl

32 0 1 0 0.00% 0.00% 0.00% 0 client_entity_se

33 0 1 0 0.00% 0.00% 0.00% 0 SERIAL A'detect

34 0 1 0 0.00% 0.00% 0.00% 0 ARP Snoop

35 12830 5961062 2 0.00% 0.00% 0.00% 0 Dynamic ARP Insp

36 9860 5961035 1 0.07% 0.00% 0.00% 0 GraphIt

37 0 1 0 0.00% 0.00% 0.00% 0 Critical Bkgnd

38 184739 699124 264 0.00% 0.00% 0.00% 0 Net Background

39 24758040 5967099 4149 0.39% 0.40% 0.40% 0 IDB Work

40 0 19 0 0.00% 0.00% 0.00% 0 Logger

41 14158 5961031 2 0.00% 0.00% 0.00% 0 TTY Background

42 20736 5990497 3 0.00% 0.00% 0.00% 0 Per-Second Jobs

43 5570567 159187 34994 0.00% 0.10% 0.06% 0 Per-minute Jobs

44 8 9 888 0.00% 0.00% 0.00% 0 IF-MGR control p

45 4 165 24 0.00% 0.00% 0.00% 0 IF-MGR event pro

46 0 1 0 0.00% 0.00% 0.00% 0 ISSU PROCESS IPC

47 0 1 0 0.00% 0.00% 0.00% 0 PrstVbl IPC Msg

48 0 2 0 0.00% 0.00% 0.00% 0 cpf_msg_holdq_pr

49 0 1 0 0.00% 0.00% 0.00% 0 cpf_msg_rcvq_pro

50 0 2 0 0.00% 0.00% 0.00% 0 IP Host Track HA

51 0 3 0 0.00% 0.00% 0.00% 0 ARP HA

52 0 1 0 0.00% 0.00% 0.00% 0 IP Admission HA

53 0 1 0 0.00% 0.00% 0.00% 0 DHCPC HA

54 0 1 0 0.00% 0.00% 0.00% 0 DHCPD HA

55 126133 12179969 10 0.07% 0.02% 0.02% 0 DHCPD Receive

56 0 1 0 0.00% 0.00% 0.00% 0 Network-rf Notif

57 145785581 548208384 265 4.95% 4.72% 4.70% 0 Cat4k Mgmt HiPri

58 200986261 302192877 665 52.63% 51.87% 52.14% 0 Cat4k Mgmt LoPri

59 10265 1389304 7 0.00% 0.00% 0.00% 0 Galios Reschedul

60 0 2 0 0.00% 0.00% 0.00% 0 IOS ACL Helper

61 0 1 0 0.00% 0.00% 0.00% 0 GalRedMsgProc

62 0 16 0 0.00% 0.00% 0.00% 0 RF Master Main T

63 4 5 800 0.00% 0.00% 0.00% 0 RF Master Status

64 0 139 0 0.00% 0.00% 0.00% 0 Net Input

65 1521245 1246567 1220 0.00% 0.01% 0.00% 0 Compute load avg

66 0 1 0 0.00% 0.00% 0.00% 0 RFS server proce

67 0 1 0 0.00% 0.00% 0.00% 0 RTTYS Process

68 0 1 0 0.00% 0.00% 0.00% 0 IPC Apps Task

69 5978 5965434 1 0.00% 0.00% 0.00% 0 RedStateMonitor

70 4 101 39 0.00% 0.00% 0.00% 0 BACK CHECK

71 0 1 0 0.00% 0.00% 0.00% 0 AggMgr Process

72 0 278 0 0.00% 0.00% 0.00% 0 Transport Port A

73 64514 1265356 50 0.00% 0.00% 0.00% 0 HC Counter Timer

74 0 1 0 0.00% 0.00% 0.00% 0 SFF8472

75 120406 997517 120 0.00% 0.00% 0.00% 0 EEM ED ND

76 0 2 0 0.00% 0.00% 0.00% 0 EEM ED Identity

77 0 3 0 0.00% 0.00% 0.00% 0 EEM ED MAT

78 0 2 0 0.00% 0.00% 0.00% 0 Ethernet OAM Pro

79 0 1 0 0.00% 0.00% 0.00% 0 PPPOE IA

80 0 2 0 0.00% 0.00% 0.00% 0 REP Topology cha

81 8 115 69 0.00% 0.00% 0.00% 0 Auth Manager

82 0 1 0 0.00% 0.00% 0.00% 0 CMD HANDLER

83 0 2 0 0.00% 0.00% 0.00% 0 Dot1x Mgr Proces

84 0 1 0 0.00% 0.00% 0.00% 0 MAB Framework

85 0 1 0 0.00% 0.00% 0.00% 0 AUTH POLICY Fram

86 0 1 0 0.00% 0.00% 0.00% 0 802.1x Webauth F

87 8 101 79 0.00% 0.00% 0.00% 0 802.1x switch

88 409738 3136863 130 0.00% 0.00% 0.00% 0 DTP Protocol

89 0 1 0 0.00% 0.00% 0.00% 0 EAP Framework

90 0 1 0 0.00% 0.00% 0.00% 0 EAP Test

4월 04

윈도우즈 커맨드로 IP 주소 설정하기.

By snowffox in Windows(M$윈도우)

MS 윈도우의 CLI에서 netsh 명령으로 IP 주소를 설정할 수 있으며, 방법은 아래와 같다.

netsh 명령으로 현재 IP주소와 인터페이스의 이름을 확인해본다.
아래에서 인터페이스 이름은 ‘이더넷’ 이며, ip주소를 설정하거나 변경할때 이 이름을 사용한다.

C:\Users\Works>netsh interface ipv4 show config

"이더넷" 인터페이스에 대한 구성
    DHCP 사용:                         Yes
    IP 주소:                           192.168.0.2
    서브넷 접두사:                        192.168.0.0/24(마스크 255.255.255.0)
    기본 게이트웨이:                         192.168.0.1
    게이트웨이 메트릭:                       0
    인터페이스 메트릭:                      25
    정적으로 구성된 DNS 서버:    8.8.8.8
    다음 접미사로 등록:                   주만
    DHCP를 통해 구성된 WINS 서버: 없음

"Loopback Pseudo-Interface 1" 인터페이스에 대한 구성
    DHCP 사용:                         No
    IP 주소:                           127.0.0.1
    서브넷 접두사:                        127.0.0.0/8(마스크 255.0.0.0)
    인터페이스 메트릭:                      75
    정적으로 구성된 DNS 서버:    없음
    다음 접미사로 등록:                   없음
    정적으로 구성된 WINS 서버:   없음

C:\Users\Works>netsh interface ipv4 show config

"이더넷" 인터페이스에 대한 구성

DHCP 사용: Yes

IP 주소: 192.168.0.2

서브넷 접두사: 192.168.0.0/24(마스크 255.255.255.0)

기본 게이트웨이: 192.168.0.1

게이트웨이 메트릭: 0

인터페이스 메트릭: 25

정적으로 구성된 DNS 서버: 8.8.8.8

다음 접미사로 등록: 주만

DHCP를 통해 구성된 WINS 서버: 없음

"Loopback Pseudo-Interface 1" 인터페이스에 대한 구성

DHCP 사용: No

IP 주소: 127.0.0.1

서브넷 접두사: 127.0.0.0/8(마스크 255.0.0.0)

인터페이스 메트릭: 75

정적으로 구성된 DNS 서버: 없음

다음 접미사로 등록: 없음

정적으로 구성된 WINS 서버: 없음

4월 03

Hyper-V Linux Guest의 검사점(check point) 생성 오류 해결하기

By snowffox in Cloud(클라우드), Windows(M$윈도우)

Hyper-V Linux Guest의 검사점(check point) 생성 오류

윈도우서버 2016 standard Hyper-v에서, 게스트 OS (리눅스 CentOS 6)의 검사점을 만들려고 할 때,아래 그림과 같이 오류가 발생했다.

Centos5.7 KVM 설치

CPAN

오라클 관리 명령어 정리

[GNS3 Labs.] Cisco NAT, DHCP 설정하기

hp virtual array 2504(VA7410) HDD교체.

ubuntu server 18.04 LTS 에 apache2, django, mod_wsgi 설치

apache2 , AH00023 에러.

[python script] 스위치 설정 저장

익스트림 스위치에서 비인가 DHCP(Rogue DHCP) 서버 차단하기.

시스코 스위치 link-flap 에러 처리

시스코 스위치에서 Rogue DHCP 서버 차단하기.

익스트림 스위치 CPU 점유문제.

Cisco C4507 스위치 CPU 점유율 상승 문제.

윈도우즈 커맨드로 IP 주소 설정하기.

Hyper-V Linux Guest의 검사점(check point) 생성 오류 해결하기

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