Solution: # ln-s libelf. so.1/usr/lib/libelf. So
3.I have not encountered this problem during installation. For details, refer to echo/usr/local/lib>/etc/lD. So. conf. d/libnetsnmp. conf.
#/Sbin/ldconfig-V
# Make install
Development considerations:
1. When using mib2c, The MIB file must be placed under/usr/local/share/snmp/mibs.2. Process: Write the MIB file, convert mib2c to C code, add the project
average value.
The maximum value of the counter32 data type count is 2 to the power of 32 minus 1. When it exceeds 4G, the counter will be cleared.
After analyzing the template of the snmp interface of zabbix, we found that the zabbix sampling time was 1 minute. Due to the large traffic, we quickly cleared the data and sometimes added new values after the count was cleared, it is bigger than the previous count. zabbix thought it was not cleared, and the time interval was directly divided by the
Start with connect by is used to create a tree structure for two fields with a parent-child relationship in a table. It searches for its subrecords in a tree structure starting from a field.
1. Create a table
Create Table test_strat_wth111(Oid varchar2 (20 ),Parent_id varchar2 (20))
2. Insert data
Insert into test_strat_wth (OID, parent_id)Values ('000000', '00 ');
Insert into test_strat_wth (
a value of 13 (quality 5). Now let's take a look at the record table to solve this problem:MwOID 0 1 2 3 4 5 6 7 00 0 0 0 0 0 0 01 21 0 2 2 2 2 2 2 23 12 0 2 2 2 3 3 3 35 103 0 2 2 2 3 Ten A A4 114 0 2 2 2 One - - -The table fills the line from left to right and then fills the next line from left to right. Where the Green line is the maximum selection of the item's range subscript OID (for example,
Background:
1. The relationship between the IP address and the MAC address in the ARP table of the layer-3 device.
2. the forwarding bridge table of the L2 device stores the correspondence between MAC and forwarding ports.
3. CDP (Cisco Discovery Protocol) is the link layer protocol for discovering adjacent devices between Cisco devices.
4. The forwarding table in the layer-2 module of a layer-3 switch is implemented in a cam table, such as show Cam dynamic.
5. When VLAN is divided, th
for most printing devices. To send jobs in raw format, the Print Server opens a TCP stream for the printer network interface. For many devices, this interface will be port 9100. After creating a TCP/IP Port, Windows uses SNMP to query the object identifier (OID) of the device according to RFC 1759 (printer MIB ). If the device returns a value, parse the System File tcpmon. ini to find the matching item. If
personally think that if I can get the MIB library of the vendor's device, it would be much easier to write a script to obtain the corresponding information based on the vendor's custom MIB library information. If I do not, then you can only use snmpwalk to get the device OID and then slowly match the corresponding, it is really dead. The attachment contains a
Check if the system has SNMP services installed# Rpm-qa|grep SNMPNet-snmp-5.3.2.2-17.el5Net-snmp-perl-5.3.2.2-17.el5Net-snmp-devel-5.3.2.2-17.el5Net-snmp-libs-5.3.2.2-17.el5Net-snmp-utils-5.3.2.2-17.el5Net-snmp-libs-5.3.2.2-17.el5Net-snmp-devel-5.3.2.2-17.el5The SNMP service will have the above installation package after installationInstalling the SNMP service1. Configure the local Yum service and use Yum to install Yum install-y net-snmp*2. Configure the SNMP service to boot #chkconfig snmpd on
table
View device IP Layer Traffic information
Port forwarding
Routing information
Device information on the switch port
Device Disk Memory information
6.SNMP Trap Reception and display
The tool comes with an SNMP trap service that can accept SNMP trap information and automatically displays the details of the trap on the interface. 7.SNMP MiB Browser
The tool comes with the M
. snmptools provides an extension agent DLL for the SNMP service, which is integrated with the SNMP service that comes with windows. The main function of this agent DLL is to use a configuration file to customize the OID and corresponding counter ing.
[1.3.6.1.4.1.15.1]Counter = physicaldisk "avg. Disk queue length" _ total
[1.3.6.1.4.1.15.2]Counter = logicaldisk "Free megabytes" _ total
The preceding is an example of the configuration file.
. If the object is Communitytarget, you need to set the version, retransmission time, and wait delay. If it is a Usertarget object, we need not only to set the version, Retransmit time, wait for the delay, but also set the security level and security name.2.3.3 Structure Send MessageIf you are sending a SNMPV3 message, we need to instantiate an object of the Scopedpdu class, otherwise we need to instantiate an object of a PDU class. After that, we also need to generate an
Original post: http://iphonesdkdev.blogspot.com/2009/01/source-code-get-hardware-info-of-iphone.html
This is a collection of open source codes to print out the hardware info of iPhone. If you know more, please post link here in comment and I will update it.
Battery info source (requires iokit header files from simulatorsdk)Http://forums.macrumors.com/showthread.php? T = 474628
Memory CPUHttp://furbo.org/2007/08/21/what-the-iphone-specs-dont-tell-you/
ProcessLandon Fuller, iphonesdk@googlegroups
; border-right:0px; Background-image:none; border-bottom:0px; padding-top:0px; padding-left:0px; border-left:0px; padding-right:0px "border=" 0 "alt=" image "src=" http://s3.51cto.com/wyfs02/M00/7E/F8/ Wkiom1cofvccgolsaabjgsk5mqg944.png "" 206 "height=" 193 "/> For traffic in and out, refer to the option of in-flow configuration out traffic
Item prototype Name
Name Description
Fill in the content
Name
Item Name
In traffic on interface {#SNMPVALU
378257 378257.0 10.0 Test2 () 1 2 2.0 0.0 return Total
The places where hits (execution times) and time values are high are places where there is more room for optimization.
Memoryprofiler
Similar to "Lineprofiler" for modules based on the row parser memory usage. GitHub Address: https://github.com/fabianp/me .... PS: Install Psutil, will analyze faster.
Same as the code in "Lineprofiler" above, run the python-m memory_profiler profile.py command produces the following results:
➜python-m Memor
t4 = sum_num(400000) 20 1 155261 155261.0 4.1 t5 = sum_num(500000) 21 1 378257 378257.0 10.0 test2() 22 23 1 2 2.0 0.0 return total
There is a lot of room for optimization when the values of hits (execution times) and time (time consumed) are high.
Memoryprofiler
Similar to the "lineprofiler" module for row-based analytics program memory usage. Github: https://github.com/fabianp/me .... Ps: install
With the successful compilation of the last snmp_pp.lib file, I learned more about SNMP ++. This is to learn various types of SNMP ++ software packages, they are OID, IPaddress, udpaddress, VB, PDU, and SNMP, in the end, we can use SNMP ++ to perform SNMP operations (such as get) on network devices that support SNMP management (such as Cisco switches ).I. Self-entertainment OID, IPaddress, and udpaddressIn
check. In this example, this means defining an alias for each independent file we want to test, because real parameters cannot be transmitted through SNMP.
If the file/etc/snmp/snmpd. conf changes, you must use the service snmpd reload command for CentOS) and reload the snmpd service. Then you can test the new check with the snmpget-v2c-c public-OvQ 10.0.0.2 NET-SNMP-EXTEND-MIB: nsExtendOutputFull. \ "check_passwd_file \" command. In this example, th
Check whether the system has installed the snmp service # rpm-qa | grep snmpNet-snmp-5.3.2.2-17.el5Net-snmp-perl-5.3.2.2-17.el5Net-snmp-devel-5.3.2.2-17.el5Net-snmp-libs-5.3.2.2-17.el5Net-snmp-utils-5.3.2.2-17.el5Net-snmp-libs-5.3.2.2-17.el5Net-snmp-devel-5.3.2.2-17.el5
The above installation packages will be available after the SNMP service is installed.
Install the SNMP service 1. Configure the local yum service and use yum to install yum install-y net-snmp *
2. Configure SNMP Service Startup
The company's server hard disk is 44 TB and only 2 TB is captured using snmpwalk. See the red font below.
[Email protected]: # snmpwalk-V 2C-C *********. 1.3.6.1.4.1.2021.9.1.6
Iso.3.6.1.4.1.2021.9.1.6.1 = integer: 226311584
Iso.3.6.1.4.1.2021.9.1.6.2 = integer: 0
Iso.3.6.1.4.1.2021.9.1.6.3 = integer: 0
Iso.3.6.1.4.1.2021.9.1.6.4 = integer: 10240
Iso.3.6.1.4.1.2021.9.1.6.5 = integer: 0
Iso.3.6.1.4.1.2021.9.1.6.6 = integer: 6608132
Iso.3.6.1.4.1.2021.9.1.6.7 = integer: 5120
Iso.3.6.1.4.1.2021.9.
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