python利用pysnmp获取交换机级联接口

def getTrunk(ip,port,agent,communication):
macAddr = []
macList = []
portList = []
macStrList = []
linkPort = []
oid1 = (1,3,6,1,2,1,4,22,1,2)#ARP表oid
oid2 = (1,3,6,1,2,1,17,4,3,1,2)#mac端口对应表lid

gen = cmdgen.CommandGenerator()
errorIndication, errorStatus, errorIndex, varBinds = gen.nextCmd(
cmdgen.CommunityData(agent, communication,1),
cmdgen.UdpTransportTarget((ip,port)),
oid1,
)
#获取ARP表里的mac地址
for varBind in varBinds:
for name,val in varBind:
macAddr.append(val.prettyPrint(0))

gen.ignoreNonIncreasingOid = True#让oid可以非递增
errorIndication, errorStatus, errorIndex, varBinds = gen.nextCmd(
cmdgen.CommunityData(agent, communication,1),
cmdgen.UdpTransportTarget((ip,port)),
oid2,
)
#获取mac端口对应关系
for varBind in varBinds:
for name,val in varBind:
macList.append(name[-6:])
portList.append(val.prettyPrint())
#将十进制mac地址转化为16进制的字符串
for item in macList:
temp = ''
for part in item:
temp += str(hex(int(part)))[2:]
temp = '0x' + temp
macStrList.append(temp)
for item in macAddr:#获取端口号
if item in macStrList:
index = macStrList.index(item)
linkPort.append(portList[index])
#去除列表中的重复元素
linkPort = {}.fromkeys(linkPort).keys()#linkPort = list(set(linkPort))
return linkPort