802.1x - Maipu Configurations

As discussed in last post, In this section we will see configuration examples for 802.1x for Maipu routers and Switches, Here I covered Client base authentication, Mac base authentication, Radius based authentication.

Device Used - MP 1800 series

Let's see Client base authentication scenario - 

802.1X Client Authentication

Topology Details

As shown in diagram, one user is connected to Port 0/1 of the device. The device manager of the device hopes to perform the 802.1X authentication for the user access on the port, so as to control the access for Internet.

Requirements:

1. During the authentication, use the Radius authentication mode (the keys of the device and server are both set as maipu).
2. When the user does not pass the authentication, he can access the Update Server (Update Server is in Vlan 10).
3. After passing the authentication, the user can access Internet (the port of the device connected to Internet is in VLAN 5).
4. After the user passes the authentication, the other users on the port can access Internet without authentication.

Topology

802.1x configuration diagram

Description

A host accesses the network via 802.1X authentication. The authentication server is a radius server. The accessed port 0/1 of the client host (Supplicant) is in the VLAN 1; the authentication server is in the VLAN 2; the Update Server is used for downloading and upgrading the client software, is in the VLAN 10; the port 0/2 connects to Internet of the switch is in the VLAN 5.

Configuration-

Command	Description
router#conf terminal	Enter the configuration mode
router(config)#aaa new-model	Enable the AAA mode
router(config)#aaa authentication connection default radius	Configure AAA as the radius authentication mode
router(config)#radius-server host 128.255.42.1 key maipu	Configure the radius server address and key
router(config)#vlan 2	Create vlan2
router(config-vlan2)#exit	Exit the vlan configuration mode
router(config)#port 0/3	Enter the port configuration mode
router(config-port-0/3)#port access vlan 2	Add port 0/3 into VLAN 2
router(config-port-0/3)#exit	Exit the port configuration mode
router(config)#interface vlan 2	Enter the interface configuration mode
router(config-if-vlan2)#ip address 128.255.42.10 255.255.255.0	Configure the address information of vlan2 interface
router(config-if-vlan2)#exit	Exit the interface configuration mode
router(config)#vlan 5	Create vlan5
router(config-vlan5)#exit	Exit the vlan configuration mode
router(config)#port 0/2	Enter the port configuration mode
router(config-port-0/2)#port access vlan 5	Add port 0/2 into VLAN 5
router(config-port-0/2)#exit	Exit the port configuration mode
router(config)#vlan 10	Create vlan 10
router(config-vlan10)#exit	Exit the vlan configuration mode
router(config)#port 0/4	Enter the port configuration mode
router(config-port-0/4)#port access vlan 10	Add port 0/4 into vlan10
router(config-port-0/4)#port 0/1	Switch to port 0/1 configuration mode
router(config-port-0/1)#dot1x port-control enable	Enable the 802.1X authentication mode
router(config-port-0/1)#dot1x port-method portbased	Configure the port-based access control mode
router(config-port-0/1)#dot1x guest-vlan 10	Configure vlan10 as guest vlan
router(config-port-0/1)#exit	Exit the port configuration
router(config)#

802.1x configuration diagram

The port 0/1 is added into the Guest VLAN, and the supplicant and update server are both in VLAN10 at the time. The supplicant can access the Update Server and download the 802.1X client:

802.1x configuration diagram

When the user passes the authentication and is online, the authentication server assigns VLAN 5. Right now the supplicant and port 0/2 are both in VLAN 5, and the Supplicant can access the Internet.

Let’s have look for MAC base authentication -

MAC Address Authentication

Local Authentication

Topology Details - 

As shown in diagram, one user is connected to port 0/0 of the device. The manager of the device hopes to perform the MAC address authentication for the user access on the port, so as to control the access for Internet.

Requirements:

1. The device detects whether the user is offline with an interval of 120s.
2.  After the user authentication fails, the authentication can be performed again only after 5 minutes.
3. During the authentication, use the local authentication mode.
4. Use the source MAC of the user as the user name and password and the MAC address uses the hyphen “-“.

Topology

Local authentication mode

Configuration

Command	Description
router#conf terminal	Enter the configuration mode
router(config)#user 00-01-7a-22-22-33 password 0 00-01-7a-22-22-33	Configure the local user; the user name and password are the MAC address of the user to be connected 00-01-7a-22-22-33
router(config)#aaa new-model	Enable the AAA mode
router(config)#aaa authentication connection default local	Configure the AAA local authentication mode
router(config)#port 0/0	Enter the port configuration mode
router(config-port-0/0)#dot1x timeout offline-detect 120	Configure performing the offline detection for the user with an interval of 120s
router(config-port-0/0)#dot1x timeout quiet-period 300	Configure the quiet time as 5 minutes (300s) after the user authentication fails
router(config-port-0/0)#dot1x mac-authentication enable	Enable the MAC authentication function on the port
router(config-port-0/0)#dot1x mac-authentication user-name-format mac-address with-hyphen	Configure the MAC authentication user name format: use the MAC information with hyphen “-“ as the use name and password (the option is the default configuration)
router(config-port-0/0)#exit	Exit the port configuration mode

The show running-config command is used to view the current configuration information:

router#show running-config

Building Configuration...done

……

user 00-01-7a-22-22-33 password 0 00-01-7a-22-22-33

……

aaa new-model

aaa authentication connection default local

……

port 0/0

  dot1x timeout offline-detect 120

 dot1x timeout quiet-period 300

 dot1x mac-authentication enable

 exit

……

Let’s have look for Radius Authentication -

RADIUS Authentication

Topology Details

As shown in diagram, one user is connected to port 0/0 of the device. The device manager hopes to perform the MAC address authentication for the user access on the port, so as to control the access for Internet.

Requirements:

1. The device detects whether the user is offline with an interval of 120s.
2. After the user authentication fails, the authentication can be performed again only after 5 minutes.
3. During the authentication, use the Radius authentication mode (set the keys of the device and server as maipu).
4. During the authentication, adopt the fixed user name format; the user name is abcd and the password is 1234.

Topology

Radius authentication mode

Configuration

Note-

When using RADIUS authentication, ensure that the route between the device and the RADIUS is available and add the user name and password successfully on the RADIUS server.

Command	Description
router#conf terminal	Enter the configuration mode
router(config)#aaa new-model	Enable the AAA mode
router(config)#aaa authentication connection default radius	Configure AAA as the radius authentication mode
router(config)#radius-server host 128.255.42.1 key maipu	Configure the Radius server address and key
router(config)#interface vlan 1	Enter the interface configuration mode
router(config-if-vlan1)#ip address 128.255.42.10 255.255.255.0	Configure the address information of vlan1 interface
router(config-if-vlan1)#exit	Exit the interface configuration mode
router(config)#port 0/0	Enter the port configuration mode
router(config-port-0/0)#dot1x timeout offline-detect 120	Configure performing the offline detection for the user with an interval of 120
router(config-port-0/0)#dot1x timeout quiet-period 300	Configure the quiet time as 5 minutes after the user authentication fails (300s)
router(config-port-0/0)#dot1x mac-authentication enable	Enable the port MAC authentication function
router(config-port-0/0)#dot1x mac-authentication user-name-format fixed account abcd password 1234	Configure the MAC authentication user name format: fixed user name format; the user name is abcd and the password is 1234
router(config-port-0/0)#exit	Exit the port configuration mode

The show running-config command can be used to view the current configuration information:

router#show running-config

Building Configuration...done

……

aaa new-model

aaa authentication connection default radius

……

port 0/0

 dot1x timeout offline-detect 120

 dot1x timeout quiet-period 300

 dot1x mac-authentication enable

dot1x mac-authentication user-name-format fixed account abcd password 1234

 exit

……

interface vlan1

 ip address 128.255.42.10 255.255.255.0

 exit

radius-server host 128.255.42.1 auth-port 1645 acct-port 1646 priority 0 key maipu

……

Monitoring Commands

Command	Description
show dot1x	Display the default parameter information of 802.1x
show dot1x statistic	Display the 802.1x statistics information
show dot1x user {port|link-aggregation|summary }	Display the 802.1x user information of the specified port. If the port is not specified, display all user information. If summary is input, display the user quantity information.
show dot1x config {port|link-aggregation}	Display the 802.1x configuration of a specified port; if no port is specified, display the 802.1x configuration of all ports (the ports which are not configured with any 802.1x item are not displayed)

Monitoring Command Output

For environment and configuration, refer to client base authentication

router#show dot1x user

Displayed result:

NO.  VLAN   MAC_ADDRESS   PORT NAME    STATUS   IP_ADDRESS   USERTYPE   USERNAME

----  ----  --------------  -------------------  -------------  ---------------  --------  --------

1     10  0005.5de4.0e25      port 0/1   Unauthorized   128.255.42.111    DOT1X  abcd

     Total: 1   Authorized: 0   Unauthorized: 1   Unknown: 0

Description and analysis:

No: user serial number

VLAN: the VLAN of the user port

MAC_ADDRESS: user MAC address

PORT NAME: port name

STATUS: user authorization status

IP_ADDRESS: user IP address

USERTYPE: the user type (DOT1X user or MAC authentication user)

USERNAME: user name

Debug Command

View the user login authentication information via the command debug dot1x all.

Hope this configuration will help you for 802.1x configurations.

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