QoS Guaranteed Bandwidth question

[Bvance]

We have a couple of tenants in our building and I was wanting to insure a guaranteed bandwidth of our 100 Mbs circuit for us regardless of what the tenants are doing. I was looking at something like this: I set all of our traffic to class 1 and all tenant traffic to class 2; create a QoS profile that sets class 1 with guaranteed bandwidth to 75 and 0 for max and class 2 with a 0 for guaranteed and 0 for max bandwidth. I am uncertain of what the 0 guaranteed will do. lets say one tenant is downloading a 35 GB file, will this QoS profile still guarantee us up to 75Mbs and the tenant have access to the remaining 25Mps + what we are not using of the 75Mps?

Thanks.,

[Remo · Accepted solution]

Hi @Bvance 

Yes, your configuration would still guarantee you to use the 75 Mbit/s and the tenant download will be slowed down to 25 Mbit/s. The 0 at egress guaranteed for class 2 means that if the traffic exceeds this value the firewall passes this traffic on a best effort basis.

A configuration that would do also what you want but with less configuration steps would be if you configure only a QoS rule for your traffic and assign class 1. In the QoS profile configure the priority of realtime and egress max of 75. As traffic that does not match a QoS rule it will be assigned to default class 4. So your traffic will always have the higher priority. When you do not use your 75 Mbit/s the tenant traffic can use the available bandwidth.

Hope this helps,

Remo

[Bvance]

Thanks for your help Remo!

[Bvance]

Quick question. What if I set class 1 to real-time and class 2 to medium but I leave max egress and guaranteed egress to 0 on both? We will still be prioritized over their traffic even whe downloading very large files?

Thanks,

[Remo]

Yes, your traffic will be  served first. But with this confoguration it is possible that you consume all the bandwidth and nothing is left for your tenant(s)