什么是'；我的信用''；我的区域'；，和'；我的路由器&x27；在这些Python PySNMP代码中？

我是Python中使用PySNMP模块的新手。根据这一点和这一点，以下python脚本执行类似的操作，如net snmp命令：

---

net snmp v1命令：

snmpget -v1 -c public -ObentU 195.218.195.228 1.3.6.1.2.1.1.1.0

from twisted.internet import reactor, defer
from pysnmp.entity import engine, config
from pysnmp.entity.rfc3413.twisted import cmdgen
from pysnmp.carrier.twisted import dispatch
from pysnmp.carrier.twisted.dgram import udp

# Create SNMP engine instance
snmpEngine = engine.SnmpEngine()

# Instantiate and register Twisted dispatcher at SNMP engine
snmpEngine.registerTransportDispatcher(dispatch.TwistedDispatcher())

#
# SNMPv1 setup
#

# SecurityName <-> CommunityName mapping
config.addV1System(snmpEngine, 'my-area', 'public')

# Specify security settings per SecurityName (SNMPv1 - 0, SNMPv2c - 1)
config.addTargetParams(snmpEngine, 'my-creds', 'my-area', 'noAuthNoPriv', 0)

#
# Setup transport endpoint and bind it with security settings yielding
# a target name
#

# UDP/IPv4
config.addSocketTransport(
    snmpEngine,
    udp.domainName,
    udp.UdpTwistedTransport().openClientMode()
)
config.addTargetAddr(
    snmpEngine, 'my-router',
    udp.domainName, ('195.218.195.228', 161),
    'my-creds'
)

# Error/response receiver
def cbFun(cbCtx):
    (errorIndication, errorStatus, errorIndex, varBinds) = cbCtx
    if errorIndication:
        print(errorIndication)
    # SNMPv1 response may contain noSuchName error *and* SNMPv2c exception,
    # so we ignore noSuchName error here
    elif errorStatus and errorStatus != 2:
        print('%s at %s' % (
                errorStatus.prettyPrint(),
                errorIndex and varBinds[int(errorIndex)-1][0] or '?'
            )
        )
    else:
        for oid, val in varBinds:
            print('%s = %s' % (oid.prettyPrint(), val.prettyPrint()))

    reactor.stop()

# Prepare request to be sent yielding Twisted deferred object
df = cmdgen.GetCommandGenerator().sendReq(
    snmpEngine,
    'my-router',
    ( ('1.3.6.1.2.1.1.1.0', None), ('1.3.6.1.2.1.1.2.0', None) ),
)

# Register error/response receiver function at deferred
df.addCallback(cbFun)

# Run Twisted main loop
reactor.run()

snmpget -v3 -l authPriv -u usr-sha-aes -a SHA -A authkey1 -x AES -X privkey1 -ObentU 195.218.195.228:161  1.3.6.1.2.1.1.1.0

from twisted.internet import reactor, defer
from pysnmp.entity import engine, config
from pysnmp.entity.rfc3413.twisted import cmdgen
from pysnmp.carrier.twisted import dispatch
from pysnmp.carrier.twisted.dgram import udp

# Create SNMP engine instance
snmpEngine = engine.SnmpEngine()

# Instantiate and register Twisted dispatcher at SNMP engine
snmpEngine.registerTransportDispatcher(dispatch.TwistedDispatcher())

#
# SNMPv3/USM setup
#

# user: usr-sha-aes, auth: SHA, priv AES
config.addV3User(
    snmpEngine, 'usr-sha-aes',
        config.usmHMACSHAAuthProtocol, 'authkey1',
            config.usmAesCfb128Protocol, 'privkey1'
            )
config.addTargetParams(snmpEngine, 'my-creds', 'usr-sha-aes', 'authPriv')

#
# Setup transport endpoint and bind it with security settings yielding
# a target name
#

# UDP/IPv4
config.addSocketTransport(
    snmpEngine,
    udp.domainName,
    udp.UdpTwistedTransport().openClientMode()
)
config.addTargetAddr(
    snmpEngine, 'my-router',
    udp.domainName, ('195.218.195.228', 161),
    'my-creds'
)

# Error/response receiver
def cbFun(cbCtx):
    (errorIndication, errorStatus, errorIndex, varBinds) = cbCtx
    if errorIndication:
        print(errorIndication)
    elif errorStatus:
        print('%s at %s' % (
                errorStatus.prettyPrint(),
                errorIndex and varBinds[int(errorIndex)-1][0] or '?'
            )
        )
    else:
        for oid, val in varBinds:
            print('%s = %s' % (oid.prettyPrint(), val.prettyPrint()))

    reactor.stop()

# Prepare request to be sent yielding Twisted deferred object
df = cmdgen.GetCommandGenerator().sendReq(
    snmpEngine,
    'my-router',
    ( ('1.3.6.1.2.1.1.1.0', None), ),
)

# Register error/response receiver function at deferred
df.addCallback(cbFun)

# Run Twisted main loop
reactor.run()

Python v1脚本：

snmpget -v1 -c public -ObentU 195.218.195.228 1.3.6.1.2.1.1.1.0

from twisted.internet import reactor, defer
from pysnmp.entity import engine, config
from pysnmp.entity.rfc3413.twisted import cmdgen
from pysnmp.carrier.twisted import dispatch
from pysnmp.carrier.twisted.dgram import udp

# Create SNMP engine instance
snmpEngine = engine.SnmpEngine()

# Instantiate and register Twisted dispatcher at SNMP engine
snmpEngine.registerTransportDispatcher(dispatch.TwistedDispatcher())

#
# SNMPv1 setup
#

# SecurityName <-> CommunityName mapping
config.addV1System(snmpEngine, 'my-area', 'public')

# Specify security settings per SecurityName (SNMPv1 - 0, SNMPv2c - 1)
config.addTargetParams(snmpEngine, 'my-creds', 'my-area', 'noAuthNoPriv', 0)

#
# Setup transport endpoint and bind it with security settings yielding
# a target name
#

# UDP/IPv4
config.addSocketTransport(
    snmpEngine,
    udp.domainName,
    udp.UdpTwistedTransport().openClientMode()
)
config.addTargetAddr(
    snmpEngine, 'my-router',
    udp.domainName, ('195.218.195.228', 161),
    'my-creds'
)

# Error/response receiver
def cbFun(cbCtx):
    (errorIndication, errorStatus, errorIndex, varBinds) = cbCtx
    if errorIndication:
        print(errorIndication)
    # SNMPv1 response may contain noSuchName error *and* SNMPv2c exception,
    # so we ignore noSuchName error here
    elif errorStatus and errorStatus != 2:
        print('%s at %s' % (
                errorStatus.prettyPrint(),
                errorIndex and varBinds[int(errorIndex)-1][0] or '?'
            )
        )
    else:
        for oid, val in varBinds:
            print('%s = %s' % (oid.prettyPrint(), val.prettyPrint()))

    reactor.stop()

# Prepare request to be sent yielding Twisted deferred object
df = cmdgen.GetCommandGenerator().sendReq(
    snmpEngine,
    'my-router',
    ( ('1.3.6.1.2.1.1.1.0', None), ('1.3.6.1.2.1.1.2.0', None) ),
)

# Register error/response receiver function at deferred
df.addCallback(cbFun)

# Run Twisted main loop
reactor.run()

snmpget -v3 -l authPriv -u usr-sha-aes -a SHA -A authkey1 -x AES -X privkey1 -ObentU 195.218.195.228:161  1.3.6.1.2.1.1.1.0

from twisted.internet import reactor, defer
from pysnmp.entity import engine, config
from pysnmp.entity.rfc3413.twisted import cmdgen
from pysnmp.carrier.twisted import dispatch
from pysnmp.carrier.twisted.dgram import udp

# Create SNMP engine instance
snmpEngine = engine.SnmpEngine()

# Instantiate and register Twisted dispatcher at SNMP engine
snmpEngine.registerTransportDispatcher(dispatch.TwistedDispatcher())

#
# SNMPv3/USM setup
#

# user: usr-sha-aes, auth: SHA, priv AES
config.addV3User(
    snmpEngine, 'usr-sha-aes',
        config.usmHMACSHAAuthProtocol, 'authkey1',
            config.usmAesCfb128Protocol, 'privkey1'
            )
config.addTargetParams(snmpEngine, 'my-creds', 'usr-sha-aes', 'authPriv')

#
# Setup transport endpoint and bind it with security settings yielding
# a target name
#

# UDP/IPv4
config.addSocketTransport(
    snmpEngine,
    udp.domainName,
    udp.UdpTwistedTransport().openClientMode()
)
config.addTargetAddr(
    snmpEngine, 'my-router',
    udp.domainName, ('195.218.195.228', 161),
    'my-creds'
)

# Error/response receiver
def cbFun(cbCtx):
    (errorIndication, errorStatus, errorIndex, varBinds) = cbCtx
    if errorIndication:
        print(errorIndication)
    elif errorStatus:
        print('%s at %s' % (
                errorStatus.prettyPrint(),
                errorIndex and varBinds[int(errorIndex)-1][0] or '?'
            )
        )
    else:
        for oid, val in varBinds:
            print('%s = %s' % (oid.prettyPrint(), val.prettyPrint()))

    reactor.stop()

# Prepare request to be sent yielding Twisted deferred object
df = cmdgen.GetCommandGenerator().sendReq(
    snmpEngine,
    'my-router',
    ( ('1.3.6.1.2.1.1.1.0', None), ),
)

# Register error/response receiver function at deferred
df.addCallback(cbFun)

# Run Twisted main loop
reactor.run()

pythonv3脚本：

snmpget -v1 -c public -ObentU 195.218.195.228 1.3.6.1.2.1.1.1.0

from twisted.internet import reactor, defer
from pysnmp.entity import engine, config
from pysnmp.entity.rfc3413.twisted import cmdgen
from pysnmp.carrier.twisted import dispatch
from pysnmp.carrier.twisted.dgram import udp

# Create SNMP engine instance
snmpEngine = engine.SnmpEngine()

# Instantiate and register Twisted dispatcher at SNMP engine
snmpEngine.registerTransportDispatcher(dispatch.TwistedDispatcher())

#
# SNMPv1 setup
#

# SecurityName <-> CommunityName mapping
config.addV1System(snmpEngine, 'my-area', 'public')

# Specify security settings per SecurityName (SNMPv1 - 0, SNMPv2c - 1)
config.addTargetParams(snmpEngine, 'my-creds', 'my-area', 'noAuthNoPriv', 0)

#
# Setup transport endpoint and bind it with security settings yielding
# a target name
#

# UDP/IPv4
config.addSocketTransport(
    snmpEngine,
    udp.domainName,
    udp.UdpTwistedTransport().openClientMode()
)
config.addTargetAddr(
    snmpEngine, 'my-router',
    udp.domainName, ('195.218.195.228', 161),
    'my-creds'
)

# Error/response receiver
def cbFun(cbCtx):
    (errorIndication, errorStatus, errorIndex, varBinds) = cbCtx
    if errorIndication:
        print(errorIndication)
    # SNMPv1 response may contain noSuchName error *and* SNMPv2c exception,
    # so we ignore noSuchName error here
    elif errorStatus and errorStatus != 2:
        print('%s at %s' % (
                errorStatus.prettyPrint(),
                errorIndex and varBinds[int(errorIndex)-1][0] or '?'
            )
        )
    else:
        for oid, val in varBinds:
            print('%s = %s' % (oid.prettyPrint(), val.prettyPrint()))

    reactor.stop()

# Prepare request to be sent yielding Twisted deferred object
df = cmdgen.GetCommandGenerator().sendReq(
    snmpEngine,
    'my-router',
    ( ('1.3.6.1.2.1.1.1.0', None), ('1.3.6.1.2.1.1.2.0', None) ),
)

# Register error/response receiver function at deferred
df.addCallback(cbFun)

# Run Twisted main loop
reactor.run()

snmpget -v3 -l authPriv -u usr-sha-aes -a SHA -A authkey1 -x AES -X privkey1 -ObentU 195.218.195.228:161  1.3.6.1.2.1.1.1.0

from twisted.internet import reactor, defer
from pysnmp.entity import engine, config
from pysnmp.entity.rfc3413.twisted import cmdgen
from pysnmp.carrier.twisted import dispatch
from pysnmp.carrier.twisted.dgram import udp

# Create SNMP engine instance
snmpEngine = engine.SnmpEngine()

# Instantiate and register Twisted dispatcher at SNMP engine
snmpEngine.registerTransportDispatcher(dispatch.TwistedDispatcher())

#
# SNMPv3/USM setup
#

# user: usr-sha-aes, auth: SHA, priv AES
config.addV3User(
    snmpEngine, 'usr-sha-aes',
        config.usmHMACSHAAuthProtocol, 'authkey1',
            config.usmAesCfb128Protocol, 'privkey1'
            )
config.addTargetParams(snmpEngine, 'my-creds', 'usr-sha-aes', 'authPriv')

#
# Setup transport endpoint and bind it with security settings yielding
# a target name
#

# UDP/IPv4
config.addSocketTransport(
    snmpEngine,
    udp.domainName,
    udp.UdpTwistedTransport().openClientMode()
)
config.addTargetAddr(
    snmpEngine, 'my-router',
    udp.domainName, ('195.218.195.228', 161),
    'my-creds'
)

# Error/response receiver
def cbFun(cbCtx):
    (errorIndication, errorStatus, errorIndex, varBinds) = cbCtx
    if errorIndication:
        print(errorIndication)
    elif errorStatus:
        print('%s at %s' % (
                errorStatus.prettyPrint(),
                errorIndex and varBinds[int(errorIndex)-1][0] or '?'
            )
        )
    else:
        for oid, val in varBinds:
            print('%s = %s' % (oid.prettyPrint(), val.prettyPrint()))

    reactor.stop()

# Prepare request to be sent yielding Twisted deferred object
df = cmdgen.GetCommandGenerator().sendReq(
    snmpEngine,
    'my-router',
    ( ('1.3.6.1.2.1.1.1.0', None), ),
)

# Register error/response receiver function at deferred
df.addCallback(cbFun)

# Run Twisted main loop
reactor.run()

---

在上面的网络snmp命令中，您可以看到没有“我的信任”、“我的区域”和“我的路由器”参数。但是，这些参数在Python脚本中使用

我可以知道这些Python PySNMP脚本中的“我的信任”、“我的区域”和“我的路由器”是什么吗？

在SNMP（不仅仅是PySNMP）中，系统配置分散在几个“SNMP表”中。它们在各自的MIB中定义，它们的行可以通过列名称进行逻辑链接

最后，您可以通过单个ID参考特定SNMP对等方的所有SNMP配置详细信息。此外，您还可以对多个不同对等方重复使用SNMP配置的公共部分

在大多数pysnmp脚本中，您可以发现以下表及其关系：

securityName + securityLevel + snmpMessageProcessingModel (3) -> snmpTargetParameters (see SNMP-TARGET-MIB::snmpTargetParams)
securityName + communityName + snmpMessageVersion (1|2c) -> snmpTargetParameters (see SNMP-COMMUNITY-MIB::snmpCommunity)
snmpTargetParameters + targetAddress + timeout + retries -> snmpTarget (see SNMP-TARGET-MIB::snmpTargetAddr)

因此，snmpTarget（例如“我的路由器”）是在请求SNMP应用程序（如命令生成器）通过特定SNMP版本和特定凭据向特定对等方发送SNMP请求时可以引用的顶级ID

此配置模型的一个特点（至少对于SNMP代理情况而言）是，它可以通过SNMP进行远程管理。

在SNMP（不仅仅是pysnmp）中，系统配置分散在几个“SNMP表”中。它们在各自的MIB中定义，它们的行可以通过列名称进行逻辑链接

最后，您可以通过单个ID参考特定SNMP对等方的所有SNMP配置详细信息。此外，您还可以对多个不同对等方重复使用SNMP配置的公共部分

在大多数pysnmp脚本中，您可以发现以下表及其关系：

securityName + securityLevel + snmpMessageProcessingModel (3) -> snmpTargetParameters (see SNMP-TARGET-MIB::snmpTargetParams)
securityName + communityName + snmpMessageVersion (1|2c) -> snmpTargetParameters (see SNMP-COMMUNITY-MIB::snmpCommunity)
snmpTargetParameters + targetAddress + timeout + retries -> snmpTarget (see SNMP-TARGET-MIB::snmpTargetAddr)

因此，snmpTarget（例如“我的路由器”）是在请求SNMP应用程序（如命令生成器）通过特定SNMP版本和特定凭据向特定对等方发送SNMP请求时可以引用的顶级ID

此配置模型的一个特点（至少对于SNMP代理情况而言）是，它可以通过SNMP进行远程管理。

在SNMP（不仅仅是pysnmp）中，系统配置分散在几个“SNMP表”中。它们在各自的MIB中定义，它们的行可以通过列名称进行逻辑链接

最后，您可以通过单个ID参考特定SNMP对等方的所有SNMP配置详细信息。此外，您还可以对多个不同对等方重复使用SNMP配置的公共部分

在大多数pysnmp脚本中，您可以发现以下表及其关系：

securityName + securityLevel + snmpMessageProcessingModel (3) -> snmpTargetParameters (see SNMP-TARGET-MIB::snmpTargetParams)
securityName + communityName + snmpMessageVersion (1|2c) -> snmpTargetParameters (see SNMP-COMMUNITY-MIB::snmpCommunity)
snmpTargetParameters + targetAddress + timeout + retries -> snmpTarget (see SNMP-TARGET-MIB::snmpTargetAddr)

因此，snmpTarget（例如“我的路由器”）是在请求SNMP应用程序（如命令生成器）通过特定SNMP版本和特定凭据向特定对等方发送SNMP请求时可以引用的顶级ID

此配置模型的一个特点（至少对于SNMP代理情况而言）是，它可以通过SNMP进行远程管理。

在SNMP（不仅仅是pysnmp）中，系统配置分散在几个“SNMP表”中。它们在各自的MIB中定义，它们的行可以通过列名称进行逻辑链接

最后，您可以通过单个ID参考特定SNMP对等方的所有SNMP配置详细信息。此外，您还可以对多个不同对等方重复使用SNMP配置的公共部分

在大多数pysnmp脚本中，您可以发现以下表及其关系：

securityName + securityLevel + snmpMessageProcessingModel (3) -> snmpTargetParameters (see SNMP-TARGET-MIB::snmpTargetParams)
securityName + communityName + snmpMessageVersion (1|2c) -> snmpTargetParameters (see SNMP-COMMUNITY-MIB::snmpCommunity)
snmpTargetParameters + targetAddress + timeout + retries -> snmpTarget (see SNMP-TARGET-MIB::snmpTargetAddr)

因此，snmpTarget（例如“我的路由器”）是在请求SNMP应用程序（如命令生成器）通过特定SNMP版本和特定凭据向特定对等方发送SNMP请求时可以引用的顶级ID

---

此配置模型的一个功能（至少对于SNMP代理情况而言）是，它可以通过SNMP进行远程管理。

可能阅读pysnmp文档或询问开发人员。可能阅读pysnmp文档或询问开发人员。可能阅读pysnmp文档或询问开发人员。可能阅读pysnmp文档或询问开发人员。