Cisco QoS / CoS / DSCP help required.

RimBlock

RimBlock

RimBlock

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Hi,

I am finally looking at configuring my Cisco RV320 router. It is managed via a web interface.

To get my service providers IPTV service working I need to set a priority of 4 to VLAN 20. I have not really played around with QoS before and the options I am getting via the web configuration pages do not match the guides I am finding.

I have a VLAN creation screen.

Lan 1 & 2 are general traffic, Lan 3 & 4 are for the IPTV service only.

I have the following;
VLAN ID: Lan 1/2/3/4
1 (default): UT/UT/UT/UT
10 (Internet): T/T/Ex/Ex
20 (IPTV): Ex/Ex/T/T
30 (VoIP): T/T/Ex/Ex

In QoS:CoS/DSCP settings I have (default):
7,6,5: 4 (Highest)
4,3: 3
2: 2
1,0: 1 (Lowest)

There is also a DSCP to Queue Table which has DSCP numbers and queue numbers. I have no idea how to relate DSCPs to actual traffic types.

On the DSCP Marking tab I have a table with "802.1p" values (0-7) all enabled with the "action" of "DSCP change" and "priority" ranging from 0->56 (0=0 & 7=56).

What I want is VLan 20 going to Lan 3 & 4 with a 802.1p QoS set to 4 for those ports (or IPTV traffic).

Any advice / links to guides on how it all ties together would be greatly appreciated.

Thanks
RB
 
If I'm understanding this correctly, you want to mark or re-mark all of the traffic entering on LAN 3 and 4 with precedence 4 (CS4 in DSCP terms)?

This should be easy. You probably want to honour DCSP 32, 34, 36 and 38 (CS4, AF41, AF42 and AF43) and mark all remaining traffic entering on those interfaces as CS4. My guess is that on that VLAN you want to "change" all of the values other than the ones above to 32.
 
Cisco actually make a "dummy" device interface configuration page available on the web. That's quite cool!

Anyway, playing around with it now and it looks like any changes to the re-marking will apply globally and not per VLAN which might interfere with any voice stuff. I'm actually not convinced you need to do what you think you need to do as by default your router is honouring any QoS/CoS values, which should be being set on the remote IPTV device I would have thought. By the time it gets to your router, your internal bandwidth should be so great you don't actually need QoS to get it to work.

Is the VLAN configuration on those ports (and on the WAN side of things, if required) correct?
 
Information gathered from other people replacing their ISPs router (the ISP provides the IPTV service as well) is that the ISPs servers send the IPTV stream on VLan 20 and will ignore anything that does not have a QoS of 4.

Most of the setup guides are for using VLan switches rather than a router and as the RV320 is pretty new so there are not really any guides specifically for setting it up.

Thanks
RB
 
Is your WAN port set up as a VLAN trunk?

Here's what I think you need to do based on what you've posted and some guesswork:

Set up VLAN 20 on the WAN link so that it is tagged. You then need to make ports 3 and 4 untagged on VLAN 20, with all of the others set to "excluded". If your IPTV device replies back with unmarked packets (get wireshark out and have a look), set the Class 0 traffic to be re-marked with CS4.

That should sort you out, I think!
 
Can't tag the Wan man :D.

Seems I cannot apply a VLan tag to the WAN port, only the Lan ports :mad: unless anyone else knows any different...

RB
 
Have others successfully used this device with your provider? I know you said there are no guides but are there any indications of success?

On "proper" Cisco IOS devices, this is accomplished with a sub-interface with an "encapsulation dot1q x" statement (where x is your VLAN number).

Let me have a look around and see if I can find anything for this device...

EDIT:

The more I think about this, the more convinced I am that a switch and a router is what you need to do here. In the guides you have seen for the switch setups that work, are the IPTV devices also on VLAN 20? I.E. not routed? That would make sense... Tag VLAN 20, put the IPTV devices on VLAN 20 and then have the native VLAN as "the Internet" - put a router on that native VLAN, put all your other stuff behind that router and job's a goodun...
 
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The model has only been out a few months so was hoping to get it working.

It also has dual WAN giving a decent advantage if I decided to go for another ISP with a static IP and keep my current ISP for the VoIP and IPTV services.

Thanks for the efforts :).

RB
 
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