[ovs-discuss] Multiple Virtual Wireless Ports

Michael Williams mw7301 at hotmail.com
Thu Jul 27 17:59:09 UTC 2017

When I WiFi interface I mean WLAN0 and in this particular box we have WLAN0 for the 5 GHz radio.

When you add it to OvS you are just adding it as an individual port to the bridge. But if you have for example 4 computers connect wirelessly its like they are all connecting via that single port unlike if you plugged in 4 computers via the wired ports where each computer would plug into a single individual port.

My problem is I want to be able to control the traffic between the wireless devices using OvS in the same way that I can control the traffic between the wired devices.

When you said added multiple wifi interfaces do you mean that you have multiple radios? Because we only have two and are only using one.

From: Joo Yong-Seok <joo.yongseok at gmail.com>
Sent: Thursday, July 27, 2017 1:33 PM
To: Michael Williams
Cc: Ben Pfaff; ovs-discuss at openvswitch.org
Subject: Re: [ovs-discuss] Multiple Virtual Wireless Ports

When you say, "wifi interface", do you mean wlan interface (which is VAP) at AP? or low-level wifi interface?
I don't know rate-limit since I've never tried but it works well for regular OVS rules.

- Drop everything
- Allow ARP
- Allow DHCP
- Allow DNS

I applied the rule in one of ovs bridge and added multiple wifi interface over GRE tunnel.

At least, I've tried this on top of Linux kernel 4.4 / OVS 2.6 - OPENWRT package.

Best regards,

On Thu, Jul 27, 2017 at 10:28 AM, Michael Williams <mw7301 at hotmail.com<mailto:mw7301 at hotmail.com>> wrote:

Hi Ben,

I don't think I explained it properly. Between the wired ports we can apply Openflow rules to limit traffic between computers connected via those wired ports, and that works with standard OvS. On the wireless WiFi side I would like to be able do the same thing and to limit the traffic between WiFi connected devices.

Since WiFi only has one interface and not multiple individual ports like the wired stuff, my rules for dropping traffic between ports won't work. So I was wondering if there was someway with OvS to limit or stop traffic between WiFi connected computers?

From: Ben Pfaff <blp at ovn.org<mailto:blp at ovn.org>>
Sent: Thursday, July 27, 2017 12:57 PM
To: Michael Williams
Cc: ovs-discuss at openvswitch.org<mailto:ovs-discuss at openvswitch.org>
Subject: Re: [ovs-discuss] Multiple Virtual Wireless Ports

On Thu, Jul 27, 2017 at 01:33:23PM +0000, Michael Williams wrote:
> We have OvS running on a wireless router with 4 wired Ethernet
> ports. We can apply rules on the wired ports but when we try to apply
> rules on the wireless port the rules don't work between multiple
> wireless devices. Is there a way within OvS to treat the wireless
> interface like multiple virtual ports so that when a wireless device
> connects we can apply rules to govern behavior between the wireless
> devices like we can with the wired devices?

OVS doesn't distinguish between different kinds of ports, so the
restrictions you're describing don't make sense; OVS doesn't work that
way.  You might be using a vendor's modified version of OVS.  If so,
then you should ask the vendor for assistance.

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