Use Procurve 2626 as qos bandwidth control?

[Peter Arendt]

Hello Everybody,

I have an ADSL VPN link at a branch, which is connected to a Procurve 2626.

I have split it into 2 Vlans
Vlan1: "Default Vlan" -- Used for Data
Vlan2: "Video" - Used by multiple IP Cameras

Both Vlans are directly connected to the router from the procurve. (Vlan1=Port1 + Vlan2=Port9)

In normal circumstances Vlan2 is busy sending video to Headoffice and saturating the ADSL link.

Data is sent via Vlan1 infrequently during the day in small bursts and the rest of time Vlan2 is free to use the link.

However when data needs to be sent via Vlan1 it is critical that this data is sent as fast as possible and during this time, I do not care if Vlan2 slows right down, drops packets etc...

My plan was to give Vlan1 priority 7 and Vlan2 priority 1. Except.....it does not work.

In testing with vlan2 disabled a 2MB file to H/O transfer takes 30 seconds and is nice and quick.

With Vlan2 running the same transfer takes Vlan1 120 seconds.

Is my Vlan approach the correct one?
(In which case where am I going wrong?)
or should I be looking at some other form of bandwidth management.

My running configuration is:

hostname "ProCurve Switch 2626"
snmp-server community "public" Unrestricted
vlan 1
name "DEFAULT_VLAN"
untagged 1-8
ip address dhcp-bootp
qos priority 7
no untagged 9-26
exit
vlan 2
name "Video"
untagged 9-26
no ip address
qos priority 1
exit


Thank you
Peter

[Trevor Commulynx]

Your QoS needs to be on your router or ADSL Gateway. the QoS on the switches on controls priority on that device.

Trev.

[Tijl van der Steeg]

Indeed, your WAN connection is the bottleneck, not the switch

[Peter Arendt]

Thank you for your quick responses.

From what I understand you are saying.

The Procurve 2626 simply tags Vlan1 as priority 7 and vlan2 as priority 1
but does not actively 'shape' the traffic in any way?

Is there any way I can get a procurve to do this and avoid having to mess with the routers.

The routers only offer qos via defined ip addresses and I want to keep it simple
by port configuration on the procurve.

What I want the procurve to do is
Provide full bandwidth to vlan2 UNLESS
Vlan1 requires it in which case throttle/drop vlan2.

Is this possible via the procurve?
or do I have to start swapping out the routers :)

Thanks
Peter

[Sietze Reitsma · Accepted solution]

The 26xx switch can prioritize traffic, but then your internet line should have the same speed as the 2600 port. So 10Mb, 100Mb or 1000Mb/1Gb

If you want to shape then a switch with this functionality is a better choice like the 3500 or 5400 series. I know that HP has introduced a 10/100 switch in the 3500 series lately.

So if the ADSL VPN modem/router is not capable then you need to have one which has this functionality or you need to investigate if a 3500 switch can handle it.

[Peter Arendt]

Thanks Sietze

I think I understand the problem.

The 2626 is actually doing qos and prioritizing traffic.

However as my (upload) bandwidth is only 400Kbps vlan2 is still going to overload this bandwidth regardless of how much qos the switch can do?

As a result Vlan1 is always going to be the poor cousin.

Even if I set a broadcast-limit of 1% this is still going to be 1Mbs which is > than the
upload bandwidth.


I think therefore this is only going to be practical via the router?

I will need to start looking at different routers / UTM's instead of the cheap ones that I am currently using. :)

Thanks again
Peter

[Sietze Reitsma]

HP ProCurve 3500-24 Switch (J9470A) can do the trick or the 3500-24 POE Switch (J9471A).

Other possibility is the 7102dl secure router.

[Peter Arendt]

Just an update for all.

The issue was down to the qos type.
The router (ASA 5505) needs DSCP tagging
and not the standard Qos tags.

Once I started to use the correct tags, things have greatly improved.

Thank you for all your help.
Peter

[Peter Arendt]

As Above