Wireless Access

Reply
Contributor II

How to prevent clients from frequently jumping VLANs

When our wireless infrastructure was put in place, a bunch of small vlans ( 3 /24 ranges for IP addresses per vlan) were created to reduce the broadcast issues at the time. 

 

Problem we see today is that a client may be placed on a vlan, but after reconnect, it would be switched to a new one. Is there anything that could be done to prevent this from happening too quickly?

 

 

Something like 'sticky vlan'?  If not, I guess we could increase the range of ip addresses in a particular vlan, and then reduce the number of them?

 

Thanks in advance.

 

°(((=((===°°°(((================================================
Guru Elite

Re: How to prevent clients from frequently jumping VLANs

Take a look at this:



http://community.arubanetworks.com/t5/Validated-Reference-Design/Single-VLAN
-Architecture-for-WLAN/ta-p/257196

| Tim Cappalli | Aruba Security | @timcappalli | timcappalli.me |

NOTE: Answers and views expressed by me on this forum are my own and not necessarily the position of Aruba or Hewlett Packard Enterprise.
Guru Elite

Re: How to prevent clients from frequently jumping VLANs


su_A_ve wrote:

When our wireless infrastructure was put in place, a bunch of small vlans ( 3 /24 ranges for IP addresses per vlan) were created to reduce the broadcast issues at the time. 

 

Problem we see today is that a client may be placed on a vlan, but after reconnect, it would be switched to a new one. Is there anything that could be done to prevent this from happening too quickly?

 

 

Something like 'sticky vlan'?  If not, I guess we could increase the range of ip addresses in a particular vlan, and then reduce the number of them?

 

Thanks in advance.

 


What mechanism is being used to assign VLANs for your devices?

 


*Answers and views expressed by me on this forum are my own and not necessarily the position of Aruba Networks or Hewlett Packard Enterprise.*
ArubaOS 8.3 User Guide
InstantOS 8.3 User Guide
Airheads Knowledgebase
Airheads Learning Videos
Contributor II

Re: How to prevent clients from frequently jumping VLANs

We use external DHCP.  This is for students, so they get lumped into the same group regardless of location. 

 

Single VLAN is the way to go, but not ready to redo the whole thing. 

°(((=((===°°°(((================================================
Guru Elite

Re: How to prevent clients from frequently jumping VLANs

What is wrong with getting a different VLAN when a student reconnects?

 


*Answers and views expressed by me on this forum are my own and not necessarily the position of Aruba Networks or Hewlett Packard Enterprise.*
ArubaOS 8.3 User Guide
InstantOS 8.3 User Guide
Airheads Knowledgebase
Airheads Learning Videos
Contributor II

Re: How to prevent clients from frequently jumping VLANs

 

Internal addresses are matched to an external address via NAT. It seems that the frequency of them jumping vlans gets them a different internal address and hence a new NAT translation is created. But the original stays put for a while. Also, easier to track down.

 

Thanks.

°(((=((===°°°(((================================================
Guru Elite

Re: How to prevent clients from frequently jumping VLANs

What mechanism on the controller is assigning the VLAN?

 


*Answers and views expressed by me on this forum are my own and not necessarily the position of Aruba Networks or Hewlett Packard Enterprise.*
ArubaOS 8.3 User Guide
InstantOS 8.3 User Guide
Airheads Knowledgebase
Airheads Learning Videos
Search Airheads
cancel
Showing results for 
Search instead for 
Did you mean: