According to IAB, SNMP, A Simple Network Management Protocol, has become very popular and has become an industrial standard for reporting management data based on IP networks. Here, we will focus on two applications of SNMP in Data Network Monitoring: real-time monitoring of network latency, real-time drawing of ATM/FR Circuit traffic and circuit alarms.
I. SNMP Network Management Framework Overview
The SNMP Network Management framework consists of two types of entities: one is the network manag
, OSPFv3, and ISISv6; supports ICMPv6 MIB, UDP6 MIB, TCP6 MIB, and IPv6 MIB. It supports both IPv4 and IPv6 protocol stacks and comprehensively supports IPv6 features and services.
To address the current trend of IPv6 technology development, NE5000E supports a wide range of transition technologies from IPv4 to IPv6: Ma
console to identify VCs traps, you must load the VCs MIB to the console. The original MIB are located at:/etc/vrtsvcs/snmp/VCs. MIB.
VCs SNMP configuration file:
/Etc/vrtsvcs/snmp/VCs. MIB
/Etc/vrtsvcs/snmp/vcs_trapd triggers
VCs provides an additional approach for reporting important events of system management. When
In SNMP, there are not many data types. Here we will discuss these data types, regardless of how they are actually encoded.IntegerAlthough a variable is defined as an integer, it also has multiple forms. Some integer variables have no range restrictions, and some integer variables are defined as specific values (for example, the IP Forwarding flag only supports the two types when forwarding or when forwarding is not allowed ), some integer variables define a specific range (for example, UDP and
An SNMP packet consists of three parts: version field), region-specific community field) and SNMP protocol data unit field (SNMP protocol data unit field). The packet length is not fixed.
The SNMP protocol also defines the SNMP message stream when the above three SNMP commands are executed, but it does not define other device management proxy SNMP commands, operations that can be applied to MIB Data Objects include the Set and Get commands, which targ
CentOS7.1 Nic settings
Today, I installed CentOS7.1, and found that it was very different from that before 6. The command changed a lot and the network configuration was not as good as that.
Next I will introduce the NIC configuration in 7, including the problems I encountered.
After the VM is installed
Run ifconfig
You will find that the NIC information has changed.
# Ifconfig
Eno16777736: flags = 4163
Inet 192.168.66.104 netmask 255.255.255.0 broadcast 192.168.66.255
Inet6 fe80: 20c: 29f
Summary:
1. Three bottom-layer magic commands of HP:# Lanscan check whether the underlying physical status of the host is UP (note that the IP layer cannot be viewed by this command)# Netstat-rn check whether IP Address binding is correct# Nslookup hny01 check whether you can parse yourself
2. Other commands
(1) lanadmin-LAN Management ProgramSummary/Usr/sbin/lanadmin [-e] [-t]/Usr/sbin/lanadmin [-a] [-Astation_addr] [-c] [-g [get_options] [-m][-M mtu_size] [-p] [-r] [-R] [-s] [-S speed] [-Vvlan
): 0blocksize for filesystem I/O: 4096number of blocks allocated: 24616time of last access: 1417922668 Sun Dec 7 11:24:28 2014time of last modification: 1418294104 Thu Dec 11 18:35:04 2014time of last status change: 1418294104 Thu Dec 11 18:35:04 2014time of last access: 1417922668 Sun Dec 7 11:24:28 2014total size, in bytes: 12582912 (12.000 MiB)time of last modification:
= (ADMIN) commandSamlee User Login test Specifies the relevant command:#建立测试用户及测试组 [[emailprotected]~]#groupaddadmin[[emailprotected]~]# useradd-gadminadmin[[emailprotected]~]#passwdadmin# using Samlee user test: [[ Emailprotected]~]$sudoifconfigeth0linkencap: ethernethwaddr00:0c:29:d3:e4:53 inetaddr:172.16.100.7Bcast:172.16.255.255Mask:255.255.0.0 inet6addr:fe80::20c:29ff:fed3:e453/64 scope:linkupbroadcastrunning multicastmtu:1500metric:1 rxpackets:61839errors:0dropped:0overruns:0frame:0 txpac
did not listen to lo, that is, the local address, even if you receive a request forwarded by the directoryserver, lo: 0 is locally broadcast to the local machine. as the service does not listen to lo, no response is returned. Cup, it took me so much time .................. the ifconfig result of realserver is as follows: eth0 Link encap: Ethernet HWaddr 00: 30: 48: C8: 7D: CA inet addr: 192.168.10.55 Bcast: 192.168.15.255 Mask: 255.255.240.0 inet6 addr: fe80 :: 230: 48ff: fec8: 7dca/64 Scope: L
All devices in CentOS are files. the NIC is also defined in the file. to bind an IP address, you only need to change the file. nic files are located in the directory:/etc/sysconfig/network-scripts to query the current IP information: ifconfig: eth0Linkencap: all devices in Etherne CentOS are files. the NIC is also defined in the file. to bind an IP address, you only need to change the file. nic files are in the directory:
/Etc/sysconfig/network-scripts: ifconfig: eth0
Link encap: Ethernet
HWad
The network protocol architecture aims to effectively support normal network operations and facilitate management of massive networks. We should be familiar with the SNMP Protocol in terms of Network Management. The SNMP Protocol is "Simple Network Management Protocol ", SNMP is first organized by Internet Engineering tasks (IETF) to solve the router management problems on the Internet 。
SNMP is currently the most commonly used Environment Management Protocol. SNMP is designed to be protocol-ind
We have already talked a lot about the concept of the SNMP protocol, in order to better apply this Protocol. Today, we will briefly introduce the content of the Linux SNMP protocol and how to manage and operate the SNMP protocol in Linux.
The Simple Network Management Protocol (Linux SNMP) is first proposed by the Internet Engineering Task Organization (IETF) research team to solve the router management problem on the Internet. We usually seldom call a database in a managed device a database. In
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