有没有办法在pysnmp中的snmpset事务中插入延迟？

问题描述 投票：2回答：2

总而言之，我对python很新，但我编写脚本的方法是尝试尽可能少地使用代码行而不牺牲可读性。话虽如此，这就是我尝试用手头的脚本做的事情。

我有一个脚本，通过Pysnmp从cisco交换机获取运行或启动配置，并将其发送到TFTP服务器。这要求在交换机上设置多个OID的值。当我尝试通过snmp在单个setCmdcommand上设置多个OID值时：

g = setCmd(SnmpEngine(),
                   CommunityData(snmp_community),
                   UdpTransportTarget((host_ip, 161)),
                   ContextData(),
                   ObjectType(ObjectIdentity('CISCO-CONFIG-COPY-MIB', 'ccCopyProtocol', random_number), 1),
                   #ObjectType(ObjectIdentity('CISCO-CONFIG-COPY-MIB', 'ccCopySourceFileType', random_number), users_numeric_entry),
                   #ObjectType(ObjectIdentity('CISCO-CONFIG-COPY-MIB', 'ccCopyDestFileType', random_number), 1),
                   #ObjectType(ObjectIdentity('CISCO-CONFIG-COPY-MIB', 'ccCopyServerAddress', random_number), '10.10.11.100'),
                   #ObjectType(ObjectIdentity('CISCO-CONFIG-COPY-MIB', 'ccCopyFileName', random_number), destination_file),
                   #ObjectType(ObjectIdentity('CISCO-CONFIG-COPY-MIB', 'ccCopyEntryRowStatus', random_number), 1)
                   )

        next(g)

我可以在交换机（通过调试）上看到SNMP数据包已经传送，但在应用它们时必须存在时间问题（设置OID的值）。 With that being said, is there a way to insert a few millisecond delay between each setCmd command?

当单独设置每个OID的值时，我的脚本按预期工作，并将配置复制到TFTP服务器。因此，对于我需要设置值的每个OID，我有一个像下面这样的setCmd：

g = setCmd(SnmpEngine(),
                   CommunityData(snmp_community),
                   UdpTransportTarget((host_ip, 161)),
                   ContextData(),
                   ObjectType(ObjectIdentity('CISCO-CONFIG-COPY-MIB', 'ccCopySourceFileType', random_number),
                              users_numeric_entry))

        next(g)

我在单个setCmd命令中设置所有OID的问题确实是一个延迟问题吗？如果是这样，我可以在命令中插入延迟吗？

感谢您的时间！

从交换机更新调试

发送单个setCmd时进行调试：

00:19:16: SNMP: Packet received via UDP from 10.10.10.10 on Vlan1
00:19:16: SNMP: Get request, reqid 2179409, errstat 0, erridx 0
 system.5.0 = NULL TYPE/VALUE
00:19:16: SNMP: Response, reqid 2179409, errstat 0, erridx 0
 system.5.0 = Switch
00:19:16: SNMP: Packet sent via UDP to 10.10.10.10
00:19:17: SNMP: Packet received via UDP from 10.10.10.10 on Vlan1
00:19:17: SNMP: Set request, reqid 2179410, errstat 0, erridx 0
 ccCopyEntry.2.21 = 1
 ccCopyEntry.3.21 = 4
 ccCopyEntry.4.21
Switch# = 1
 ccCopyEntry.5.21 = 10.10.10.10
 ccCopyEntry.6.21 = Switch-running.txt
 ccCopyEntry.14.21 = 1
00:19:17: SNMP: Response, reqid 2179410, errstat 12, erridx 6
 ccCopyEntry.2.21 = 1
 ccCopyEntry.3.21 = 4
 ccCopyEntry.4.21 = 1
 ccCopyEntry.5.21 = 10.10.10.10
 ccCopyEntry.6.21 = Switch-running.txt
 ccCopyEntry.14.21 = 1
00:19:17: SNMP: Packet sent via UDP to 10.10.10.10

当我发送单独的setCmd命令时：

00:15:33: SNMP: Packet received via UDP from 10.10.10.10 on Vlan1
00:15:33: SNMP: Get request, reqid -1563913845, errstat 0, erridx 0
 system.5.0 = NULL TYPE/VALUE
00:15:33: SNMP: Response, reqid -1563913845, errstat 0, erridx 0
 system.5.0 = Switch
00:15:33: SNMP: Packet sent via UDP to 10.10.10.10
00:15:34: SNMP: Packet received via UDP from 10.10.10.10 on Vlan1
00:15:34: SNMP: Set request, reqid -1563913844, errstat 0, erridx 0
 ccCopyEntry.2.102 = 1
00:15:34: SNMP: Response, req
Switch#id -1563913844, errstat 0, erridx 0
 ccCopyEntry.2.102 = 1
00:15:34: SNMP: Packet sent via UDP to 10.10.10.10
00:15:34: SNMP: Packet received via UDP from 10.10.10.10 on Vlan1
00:15:34: SNMP: Set request, reqid -1563913843, errstat 0, erridx 0
 ccCopyEntry.3.102 = 3
00:15:34: SNMP: Response, reqid -1563913843, errstat 0, erridx 0
 ccCopyEntry.3.102 = 3
00:15:34: SNMP: Packet sent via UDP to 10.10.10.10
00:15:34: SNMP: Packet received via UDP from 10.10.10.10 on Vlan1
00:15:34: SNMP: Set request, reqid
Switch# -1563913842, errstat 0, erridx 0
 ccCopyEntry.4.102 = 1
00:15:34: SNMP: Response, reqid -1563913842, errstat 0, erridx 0
 ccCopyEntry.4.102 = 1
00:15:34: SNMP: Packet sent via UDP to 10.10.10.10
00:15:34: SNMP: Packet received via UDP from 10.10.10.10 on Vlan1
00:15:34: SNMP: Set request, reqid -1563913841, errstat 0, erridx 0
 ccCopyEntry.5.102 = 10.0.1.81
00:15:34: SNMP: Response, reqid -1563913841, errstat 0, erridx 0
 ccCopyEntry.5.102 = 10.0.1.81
00:15:34: SNMP: Packet sent via UDP to 10.0.
Switch#1.20
00:15:34: SNMP: Packet received via UDP from 10.10.10.10 on Vlan1
00:15:34: SNMP: Set request, reqid -1563913840, errstat 0, erridx 0
 ccCopyEntry.6.102 = Switch--start.txt
00:15:34: SNMP: Response, reqid -1563913840, errstat 0, erridx 0
 ccCopyEntry.6.102 = Switch--start.txt
00:15:34: SNMP: Packet sent via UDP to 10.10.10.10
00:15:34: SNMP: Packet received via UDP from 10.10.10.10 on Vlan1
00:15:34: SNMP: Set request, reqid -1563913839, errstat 0, erridx 0
 ccCopyEntry.14.102 =
Switch#1
00:15:34: SNMP: Response, reqid -1563913839, errstat 0, erridx 0
 ccCopyEntry.14.102 = 1
00:15:34: SNMP: Packet sent via UDP to 10.10.10.10
00:15:34: SNMP: Packet received via UDP from 10.10.10.10 on Vlan1
00:15:34: SNMP: Get request, reqid -1563913838, errstat 0, erridx 0
 ccCopyEntry.10.102 = NULL TYPE/VALUE
00:15:34: SNMP: Response, reqid -1563913838, errstat 0, erridx 0
 ccCopyEntry.10.102 = 2
00:15:34: SNMP: Packet sent via UDP to 10.10.10.10
Switch#
00:15:37: SNMP: Packet received via UDP from 10.10.10.10 on Vlan1
00:15:37: SNMP: Set request, reqid -1563913837, errstat 0, erridx 0
 ccCopyEntry.14.102 = 6
00:15:37: SNMP: Response, reqid -1563913837, errstat 0, erridx 0
 ccCopyEntry.14.102 = 6
00:15:37: SNMP: Packet sent via UDP to 10.10.10.10
python-3.x snmp pysnmp
2个回答
1
投票

该条目遵循qstxswpoi中详述的RowStatus语义

在我看来，您需要将ccCopyEntryRowStatus设置为createAndGo而不是active。

1
投票

我不认为您可以在cisco开关内部使用SNMP代理来单独处理具有延迟的SNMP变量。你（作为一个用户）期望照顾时间也是非常可疑的...

所以我可能会试着理解为什么交换机不喜欢你的管理命令，管理它的正确方法是什么......一个可能的灵感来源是MIB中描述你正在处理的变量的描述。

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