网工Python之路之paramiko 模块实验（五）异常处理

初始化1.配置hostname 和domain-namehostname  LSW1ip  domain-name  shiranit.com
2.产生密钥，产生1024位的密钥crypto key generate rsa general-keys  modulus 1024
3.配置sssh的信息会话超时时间ip ssh  time-out 120最大认证次数ip ssh authentication-retries 3启用ssh和telnet认证line vty 0 4  transport input ssh telnet   login local
4.本地认证用户 enable passwod 123 username python privilege 15 password 123 PS: privilege 15这么设置是为了免去登陆时输入enable密码
 5.配置管理地址 interface Vlan 1    ip address 192.168.242.11 255.255.255.0

import paramikoimport timeimport getpassimport sysimport socket
username = input("Username: ")password = getpass.getpass("Password: ")ip_file = sys.argv[1]cmd_file = sys.argv[2]
# 存放认证失败的设备信息switch_with_authentication_issue = []# 存放网络不通的设备信息switch_not_reachable = []
iplist = open(ip_file,'r')for line in iplist.readlines():    try:            ip = line.strip()        ssh_client = paramiko.SSHClient()        ssh_client.set_missing_host_key_policy(paramiko.AutoAddPolicy())        ssh_client.connect(hostname=ip,username=username,                           password=password,look_for_keys=False)        print('=-=-=-=-=-=-=-=-=-=-=-=-=-=')        print('已经成功登陆交换机 ' + ip)        command = ssh_client.invoke_shell()        cmdlist = open(cmd_file,'r')        cmdlist.seek(0)        for line in cmdlist.readlines():            each_command = line.strip()            command.send(each_command + 'n')            time.sleep(0.5)        cmdlist.close()        output = command.recv(65535).decode('ASCII')        print(output)    except paramiko.ssh_exception.AuthenticationException:        print(ip + "用户验证失败！")        switch_with_authentication_issue.append(ip)    except socket.error:        print(ip + "目标不可达！")        switch_not_reachable.append(ip)
iplist.close()ssh_client.close()
print('n 下列交换机用户验证失败：')for i in switch_with_authentication_issue:    print(i)
print('n 下列交换机不可达：')for i in switch_not_reachable:    print(i)

sysname LSW1
aaa# 密码明文 123 local-user python password cipher #*C>*$C`S!INZPO3JBXBHA!! local-user python privilege level 3 local-user python service-type ssh
interface Vlanif1 ip address 192.168.11.11 255.255.255.0
stelnet server enable# 下面这条很关键，我一开始没配置这条，一直 ssh 反馈有错误。# 模拟器的产品手册说这条是默认值，但测试后需要手动配置。ssh authentication-type default password
user-interface vty 0 4 authentication-mode aaa protocol inbound ssh

import paramikoimport timeimport getpassimport sysimport socket
username = input("Username: ")password = getpass.getpass("Password: ")ip_file = sys.argv[1]cmd_file = sys.argv[2]
# 存放认证失败的设备信息switch_with_authentication_issue = []# 存放网络不通的设备信息switch_not_reachable = []
iplist = open(ip_file,'r')for line in iplist.readlines():    try:            ip = line.strip()        ssh_client = paramiko.SSHClient()        ssh_client.set_missing_host_key_policy(paramiko.AutoAddPolicy())        ssh_client.connect(hostname=ip,username=username,                           password=password,look_for_keys=False)        print('=-=-=-=-=-=-=-=-=-=-=-=-=-=')        print('已经成功登陆交换机 ' + ip)        command = ssh_client.invoke_shell()        cmdlist = open(cmd_file,'r')        cmdlist.seek(0)        for line in cmdlist.readlines():            each_command = line.strip()            command.send(each_command + 'n')            time.sleep(0.5)        cmdlist.close()        output = command.recv(65535).decode('ASCII')        print(output)    except paramiko.ssh_exception.AuthenticationException:        print(ip + "用户验证失败！")        switch_with_authentication_issue.append(ip)    except socket.error:        print(ip + "目标不可达！")        switch_not_reachable.append(ip)
iplist.close()ssh_client.close()
print('n 下列交换机用户验证失败：')for i in switch_with_authentication_issue:    print(i)
print('n 下列交换机不可达：')for i in switch_not_reachable:    print(i)