Re: altq for vlans?
From: Jon Simola (jsimola_at_gmail.com)
Date: 02/14/05
- Previous message: Max Laier: "Re: altq for vlans?"
- In reply to: David Gilbert: "Re: altq for vlans?"
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Date: Mon, 14 Feb 2005 06:12:06 -0800 To: David Gilbert <dgilbert@dclg.ca>
> > On Sunday 13 February 2005 22:36, David Gilbert wrote:
> >> Has anyone considered patching the vlan driver to support altq? I
> >> gather that since tun works, so should vlan.
>
> Well... the issue is several fold. Firstly, the router in question is
> talking in trunk mode to a switch which in turn hands out ports to end
> user boxes. So the "real" interface could be queue limited, but in
> general, it can be assumed that the GigE interface is faster than the
> sum of the traffic coming into it.
>
> Now... you seem to be saying that if the queue is attached to (in this
> case) em0, and vlan10 goes through em0, that traffic will be subject
> to the queue ... even though it's been tagged ... and from the
> perspective of em0 is no longer IP traffic.
>
> This is certainly not obvious, if it is the case.
>
> But from a vlan-as-virtual-circuit-replacement standpoint, it makes
> sense to note a vlan as a queue entity.
I went through exactly this. I wrote my own patch for if_vlan.c that
allowed ALTQ queueing on a vlan interface. I used that patch and ran
hundreds of GBs of live customer data a week through the router with
those patches. I never saw any problems. Then again, I never managed
to figure out queuing on the vlan parent interface either. Both worked
as far as I could tell, but I've gone to
> Anyways, the _real_ problem is that traditionally, I'd used firewall
> rules for accounting as well as security.
I've used several varieties of firewall rules to count traffic (count
rules, ipfw pipes) and I've switched over to a custom program that
sniffs packets via libpcap off the vlan parent, and counts them.
It's not fancy, but it does have some certain advantages (like passive
MAC address sniffing, which I find quite handy dealing with some of
the more "adventurous" clients).
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- Previous message: Max Laier: "Re: altq for vlans?"
- In reply to: David Gilbert: "Re: altq for vlans?"
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