Standalone MAB Support
Standalone MAC Authentication Bypass (MAB) is an authentication method that grants network access to specific MAC addresses regardless of 802.1X capability or credentials. As a result, devices such as cash registers, fax machines, and printers can be readily authenticated, and network features that are based on authorization policies can be made available.
Before standalone MAB support was available, MAB could be configured only as a failover method for 802.1x authentication. Standalone MAB is independent of 802.1x authentication.
Finding Feature
Information
Your software release
may not support all the features documented in this module. For the latest
caveats and feature information, see
Bug Search Tool and the
release notes for your platform and software release. To find information about
the features documented in this module, and to see a list of the releases in
which each feature is supported, see the feature information table.
Use Cisco Feature
Navigator to find information about platform support and Cisco software image
support. To access Cisco Feature Navigator, go to
www.cisco.com/go/cfn.
An account on Cisco.com is not required.
Information About Configuring Standalone MAB
Standalone MAB
MAC Authentication Bypass (MAB) uses the MAC address of the connecting device to grant or deny network access. To support MAB, the RADIUS authentication server maintains a database of MAC addresses for devices that require access to the network. MAB generates a RADIUS request with a MAC address in the Calling-Station-Id (attribute 31) and with a Service-Type (attribute 6) 10. After a successful authentication, the Auth Manager enables various authorization features specified by the authorization policy, such as ACL assignment and VLAN assignment.
How to Configure Standalone MAB Support
Enabling Standalone
MAB
Ports enabled with
the Standalone MAB feature can use the MAC address of connecting devices to
grant or deny network access. Perform the steps described in this section to
enable standalone MAB on individual ports.
Before You Begin
Before you can
configure standalone MAB, the device must be connected to a Cisco Secure ACS
server and RADIUS authentication, authorization, and accounting (AAA) must be
configured.
 Note |
Standalone MAB
can be configured on devices with switched ports only; it cannot be configured
on devices with routed ports.
|
 Note |
If you are unsure
whether MAB or MAB Extensible Authentication Protocol (EAP) is enabled or
disabled on the switched port, use the
default
mabor
default
mab
eap commands in interface configuration mode to
configure MAB or MAB EAP.
|
SUMMARY STEPS1.
enable
2.
configure
terminal
3.
interface
type
slot
/
port
4.
switchport
5.
switchport
mode
access
6.
authentication
port-control
auto
7.
mab
8.
end
DETAILED STEPS | Command or Action | Purpose |
---|
Step 1 |
enable
Example:
|
Enables
privileged EXEC mode.
|
Step 2 |
configure
terminal
Example:
Device# configure terminal
|
Enters global
configuration mode.
|
Step 3 |
interface
type
slot
/
port
Example:
Device(config)# interface Gigabitethernet 1/2/1
|
Enters
interface configuration mode.
|
Step 4 |
switchport
Example:
Switch(config-if)# switchport
|
Places
interface in Layer 2 switched mode.
|
Step 5 |
switchport
mode
access
Example:
Device(config-if)# switchport mode access
|
Sets the
interface type a as nontrunking, nontagged single VLAN Layer 2 interface.
|
Step 6 |
authentication
port-control
auto
Example:
Device(config-if)# authentication port-control auto
|
Configures the
authorization state of the port.
|
Step 7 |
mab
Example:
|
Enables MAB.
|
Step 8 |
end
Example:
|
Exits
interface configuration mode and returns to privileged EXEC mode.
|
Troubleshooting Tips
The following commands can help troubleshoot standalone MAB:
Configuration Examples for Standalone MAB Support
Example: Standalone MAB
Configuration
The following
example shows how to configure standalone MAB on a port. In this example, the
client is reauthenticated every 1200 seconds and the connection is dropped
after 600 seconds of inactivity.
Device> enable
Device# configure terminal
Device(config)# interface GigabitEthernet 1/2/1
Device(config-if)# switchport
Device(config-if)# switchport mode access
Device(config-if)# switchport access vlan 2
Device(config-if)# authentication port-control auto
Device(config-if)# mab
Device(config-if)# authentication violation shutdown
Device(config-if)# authentication timer restart 30
Device(config-if)# authentication periodic
Device(config-if)# authentication timer reauthenticate 1200
Device(config-if)# authentication timer inactivity 600
Additional References
Related Documents
Related Topic
|
Document Title
|
Cisco IOS commands
|
Cisco IOS Master Command List, All Releases
|
Authentication commands
|
Cisco IOS Security Command Reference
|
IEEE 802.1x—Flexible Authentication
|
Securing User Services Configuration Library
|
MIBs
MIB
|
MIBs Link
|
|
To locate and download MIBs for selected platforms, Cisco IOS software releases, and feature sets, use Cisco MIB Locator found at the following URL:
http://www.cisco.com/go/mibs
|
RFCs
RFC
|
Title
|
RFC 3580
|
IEEE 802.1x Remote Authentication Dial In User Service (RADIUS)
|
Technical Assistance
Description
|
Link
|
The Cisco Support and Documentation website provides online resources to download documentation, software, and tools. Use these resources to install and configure the software and to troubleshoot and resolve technical issues with Cisco products and technologies. Access to most tools on the Cisco Support and Documentation website requires a Cisco.com user ID and password.
|
http://www.cisco.com/cisco/web/support/index.html
|
Feature Information for
Standalone MAB Support
The following table provides release information about the feature or features described in this module. This table lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature.
Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/go/cfn. An account on Cisco.com is not required.
Table 1 Feature Information for
Standalone MAB Support
Feature
Name
|
Releases
|
Feature
Information
|
Standalone
MAB Support
|
12.2(33)SXI
15.2(2)T
|
This
feature grants network access to devices based on MAC address regardless of
802.1x capability or credentials.
The
following commands were introduced or modified:
authentication
periodic,
authentication
port-control,
authentication
timer
inactivity,
authentication
timer
reauthenticate,
authentication
timer
restart,
authentication
violation,
debug
authentication,
mab,
show
authentication
interface,
show
authentication
registrations,
show
authentication
sessions, and
show
mab.
|