Basic QoS Question

RouterOS General
1

I am trying to implement some basic QoS at some of our locations. This is complicated a bit since we are using hotspots with PCC for load balancing and redundancy on the boxes as well. Ideally I would like to have something in place much like what is outlined in this wiki.
http://wiki.mikrotik.com/wiki/Connection_Rate

I believe that I do have something worked out, and just wanted to post the configuration to see if this will accomplish what I am looking for, or if there is a better way to go about it.
For the first ISP they have a T-1, the other is a cable connection with a 30/5. So for the LAN port I put a queue on that interface and combined the two amounts of download, then for each ISP I put another queue on their interfaces. I tried putting it on the Global In and Out for their parents, but I need to keep the functionality of the simple queues going for bandwidth profiles for guests.

/ip firewall mangle
add action=jump chain=forward comment="Mangle rules for QoS" disabled=no jump-target=hotspot src-address=192.168.50.0/23
add action=jump chain=forward comment="" disabled=no dst-address=192.168.50.0/23 jump-target=QoS
add action=mark-packet chain=QoS comment="" disabled=no new-packet-mark=other_traffic passthrough=yes
add action=mark-packet chain=QoS comment="" connection-bytes=500000-0 connection-rate=200k-100M disabled=no new-packet-mark=heavy_traffic passthrough=yes protocol=tcp
add action=mark-packet chain=QoS comment="" connection-bytes=500000-0 connection-rate=200k-100M disabled=no new-packet-mark=heavy_traffic passthrough=yes protocol=udp
/queue tree
add burst-limit=0 burst-threshold=0 burst-time=0s disabled=no limit-at=0 max-limit=31500k name="Global Download" parent="Guest Network" priority=8
add burst-limit=0 burst-threshold=0 burst-time=0s disabled=no limit-at=25M max-limit=31500k name="Normal Download" packet-mark=other_traffic parent="Global Download" \
    priority=1 queue=default
add burst-limit=0 burst-threshold=0 burst-time=0s disabled=no limit-at=6500k max-limit=31500k name="Heavy Download" packet-mark=heavy_traffic parent="Global Download" \
    priority=8 queue=default
add burst-limit=0 burst-threshold=0 burst-time=0s disabled=no limit-at=0 max-limit=1500k name="Global Upload ISP1" parent=ether1 priority=8
add burst-limit=0 burst-threshold=0 burst-time=0s disabled=no limit-at=1M max-limit=1500k name="Normal Upload ISP1" packet-mark=other_traffic parent="Global Upload ISP1" \
    priority=1 queue=default
add burst-limit=0 burst-threshold=0 burst-time=0s disabled=no limit-at=500k max-limit=1500k name="Heavy Upload ISP1" packet-mark=heavy_traffic parent="Global Upload ISP1" \
    priority=8 queue=default
add burst-limit=0 burst-threshold=0 burst-time=0s disabled=no limit-at=0 max-limit=5M name="Global Upload ISP2" parent=ether2 priority=8
add burst-limit=0 burst-threshold=0 burst-time=0s disabled=no limit-at=4M max-limit=5M name="Normal Upload ISP2" packet-mark=other_traffic parent=\
    "Global Upload ISP2" priority=1 queue=default
add burst-limit=0 burst-threshold=0 burst-time=0s disabled=no limit-at=1M max-limit=5M name="Heavy Upload ISP2" packet-mark=heavy_traffic parent=\
    "Global Upload ISP2" priority=8 queue=default

My main concern with this is what it will do to CPU usage. Right now most of our boxes (450 boards) rarely exceed ~20% even under full load, so I’m hopping it won’t overload anything.

2

Queue trees are going to perform far better than simple queues as far as CPU resources go. Depending on how they are set up they can consume slightly more memory, though - but unless you’re already close to maxing that out there should not be an issue as the increase usually is very small.

For what it’s worth I’ll be talking about using PCQ with Hotspots at the MUM next week. That lets you keep per user rate limits while skipping simple queues, which at large load is a rather big resource saver and has some other neat side effects. While that’s only one of the two levels of QoS you’re looking to implement it shouldn’t be hard to combine the two and run everything through queue trees.

3

I saw that, and will definitely be attending that particular presentation. I’ve been trying to get my head warped around QoS and queues on and off for a while now, hoping your presentation will help.

4

Hell, I hope it does, too.