Multiple Vlan assigment in Free radius server with Cisco Nexus Switch.

deepak rawat deepakrawat.singh at
Mon Dec 13 11:17:27 CET 2021

Thanks for the reply, 
We have a Nexus 3548-X Cisco Switch and as per cisco it support the Multiple Vlan.
I tried to follow this RFC4675 but not able to find any example so not sure how to configure it.
I have two vlan 1968 and Vlan 1969 and both are tagged.
Does it look like this Cleartext-Password := "54321"  Tunnel-Type = VLAN, Tunnel-Medium-Type = IEEE-802,  Tunnel-Private-Group-ID =+ 0x3100007B0,0x3100007B1
 Regards,Deepak Rawat
    On Monday, December 13, 2021, 09:13:49 AM GMT+1, petr.linke at <petr.linke at> wrote:  
"Hi Alan,Yes it is possible to give two vlan in Cisco as a trunk vlan and 
our node which is connected to Cisco port is also has two vlan 1968 and 1969
and both of them are trunk and connected to Cisco port and over it dot1x is 
working.Our problem is whenever we are giving one vlan in free radius server
like 1968 or 1969 then Cisco AUTH VLAN is set accordingly but if we try to 
give two vlan together in free radius user file the. The Cisco dot1x is 
change to AUTH Vlan as default vlan(1).
So is it poosible to give two vlan in free radius server with cisco switch 
and if yes the in which pattern we need to give in radius user file.

 You must use the radius attribute egress-vlan-id to set the port as a VLAN 
trunk during authorization (see RFC4675). This attribute can be set multiple
times (use operator =+).  See

"  What does this Cisco documentation say?  i.e. is it possible for you to 
assign two VLANs to the same device? "

It is dependend on version of Cisco IOS. 


Petr Linke
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