如何使用PySNMP获取SNMPtable

Question

我试图从CDP表中获取关于设备邻居的信息，但是我只得到一个邻居的数据。例如，我确定设备有两个邻居，我向cdpCacheDeviceId发出请求，得到一个邻居的ID。如何获取两个设备的ID？在

def get_cdp_tables(host):
for (errorIndication,
     errorStatus,
     errorIndex,
     varBinds) in nextCmd(SnmpEngine(),
                          CommunityData(''),
                          UdpTransportTarget((host, 161)),
                          ContextData(),
                          # cdpCacheTable
                          ObjectType(ObjectIdentity('1.0.8802.1.1.2.1.4.1.1.7')),  # cdpCacheDevicePort
                          ObjectType(ObjectIdentity('1.3.6.1.4.1.9.9.23.1.2.1.1.17')),  # cdpCacheSysName
                          ObjectType(ObjectIdentity('1.3.6.1.4.1.9.9.23.1.2.1.1.1')),  # cdpCacheIfIndex
                          ObjectType(ObjectIdentity('1.3.6.1.4.1.9.9.23.1.2.1.1.6')),  # cdpCacheDeviceId
                          ObjectType(ObjectIdentity('1.3.6.1.4.1.9.9.23.1.2.1.1.4')),  # cdpCacheAddress
                          lexicographicMode=False):

    if errorIndication:
        print(errorIndication)
    elif errorStatus:
        print('%s at %s' % (errorStatus.prettyPrint(),
                            errorIndex and varBinds[int(errorIndex) - 1][0] or '?'))
    else:
        with open('cdp.txt', 'a', 1) as cdp_file:
            cdp_file.write(host + '\n')
            for i in range(len(varBinds)):
                cdp_file.write(str(varBinds[i]) + '\n')
        return

这就是我在输出中得到的：

^{pr2}$

Answer 1

正如伊利亚·埃蒂戈夫所说，这里有一个问题，{}与不正确的表格。工作代码如下：

def get_cdp_tables(host):
for (errorIndication,
     errorStatus,
     errorIndex,
     varBinds) in nextCmd(SnmpEngine(),
                          CommunityData(''),
                          UdpTransportTarget((host, 161)),
                          ContextData(),
                          # cdpCacheTable
                          ObjectType(ObjectIdentity('1.0.8802.1.1.2.1.4.1.1.7')),  # cdpCacheDevicePort
                          ObjectType(ObjectIdentity('1.3.6.1.4.1.9.9.23.1.2.1.1.17')),  # cdpCacheSysName
                          ObjectType(ObjectIdentity('1.3.6.1.4.1.9.9.23.1.2.1.1.1')),  # cdpCacheIfIndex
                          ObjectType(ObjectIdentity('1.3.6.1.4.1.9.9.23.1.2.1.1.6')),  # cdpCacheDeviceId
                          ObjectType(ObjectIdentity('1.3.6.1.4.1.9.9.23.1.2.1.1.4')),  # cdpCacheAddress
                          lexicographicMode=False):

    if errorIndication:
        print(errorIndication)
    elif errorStatus:
        print('%s at %s' % (errorStatus.prettyPrint(),
                            errorIndex and varBinds[int(errorIndex) - 1][0] or '?'))
    else:
        with open('cdp.txt', 'a', 1) as cdp_file:
            cdp_file.write(host + '\n')
            for i in range(len(varBinds)):
                cdp_file.write(str(varBinds[i]) + '\n')
return