Dot1x comments Vlan / Auth Fail Vlan editions

Hi all

Configure dot1x on our access layer switch ports and I have a few problems with devices that fail authentication.  This is the current configuration on the way to the switch:

switchport mode access

switchport voice vlan 38

dot1x mac-auth-bypass

dot1x EAP authenticator

self control-port dot1x

multi-domain host-mode dot1x

dot1x timeout server-timeout 10

Server of reauth-dot1x timeout period

dot1x tx-time 10

dot1x timeout supp-timeout 3

dot1x max - req 3

dot1x max-reauth-req 3

dot1x re-authentication

criticism of dot1x

critical recovery dot1x action reset

dot1x auth failure vlan 7

dot1x comments - vlan 7

dot1x critical vlan 36

spanning tree portfast

spanning tree enable bpduguard

When a non-employee connects they go through the authentication process and eventually fail dot1x and mab and placed in the vlan designated guest 7.  If you're doing a "show int gx / x status" on this port, switch-it shows the connected and to this vlan 7.  If you're doing a "show dot1x int gx / x details" it also shows the port as authorized (by Guest-Vlan) and politics of vlan is 7.  The problem is the user never gets a valid ip address - they receive only a 169.x.x.x.  Anyone has experience with this type of question or have any recommendations?

Thank you

Brian

-First of all Eteinte, your switch orders tell me you are using old software on your switch, you must pass it first of all, there was a lot of correction of a bug and improvements to dot1x/mab in recent versions

-Your problem is probably that the client dhcp of your comments is delay until you are finished with dot1x and mab, susally tx-period to a lower number of adjustment could help the time it takes before joining the vlan comments, but could also have an impact on your computers running dot1x, you should try some different values. Also, using Windows XP SP3 or Windows 7, also helps on your machines to dot1x, and finally using supplicant AnyConnect NAM he will operate properly without having any problems when setting the timers dot1x on your switch.

-With the new software I go with default timers, perhaps change tx-5 second period and then use the "order mab dot1x authentication" and "authentication priority mab dot1x", also having your vlan comments like your vlan by default, will be generally also solve the problem of the guests have to do a new once-popular dhcp reqeust, however you can run into problems with stuff you wan't to use mab on.

Tags: Cisco Security

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