2900/2520 Series - qos

[yufopolu]

Hi everybody,

here my backgroud:

Location A:
ProCurve Switch 2900-48G (J9050A) Switch, vmware, Citrix Farm, Server, email Clients etc.

Location B:

2520-24-PoE(J9138A)
ClientsBackup-Storage

Location A and Location B are connected with a 100MBit Ethernet-Connect line from a local carrier.

We syncronize our vmware storage from Location A to Location B with Veeam Backup.
This works fine. But while the backup process, the whole bandwith is used. The other application hangs.

For Citrix Session we need TCP/2598 and TCP/1498,

for EMail (Exchange), TCP/135, TCP/443 and high-ports.

Is it possible to priorize citrix apps and exchange apps on the switches?

best thanks

[Emil_G]

Hello, 

You can find information about the QoS features supported by both switches in the Advancex Traffic Management Guide of the respective switch. This is the link for the 2900 switch series, chapter 5, page 187.

https://support.hpe.com/hpesc/public/docDisplay?docLocale=en_US&docId=c02564271

If I understand correctly you would like to assign a higher priority to the applications based on the TCP/UDP port number only, regardless of VLAN, interface number or device IP?

This is possible on the 2900 switches, Please have a look at page 201 -208 (5-15 to 5-22), QoS UDP/TCP Priority.

When you use UDP or TCP and a layer 4 Application port number as a QoS classifier, traffic carrying the specified UDP/TCP port number(s) is marked with the UDP/TCP classifier’s configured priority level, without regard for any other QoS classifiers in the switch. You can have up to 50 UDP/TCP application port numbers as QoS classifiers. 

...

You can find here more details on how it is configured and some examples.

Here is the Advanced Traffic Management Guide for the 2520 fast ethernet switches, running S.15.06 OS.

https://support.hpe.com/hpesc/public/docDisplay?docLocale=en_US&docId=c03460279

The QoS chapter 5 is on page 179

While 2900 is a Layer 3 lite switch which can be used as aggregation for small environments, the 2520 series is a pure Layer 2 switch. For this reason it is more limited in its QoS capabilites. So looking at the supported classifiers I dont see the option to assign priority based on the TCP/UDP port only.

The switch can assign priority based on VLAN ID or interface ID. The switch can also honor the priority of the incoming traffic that was given the packet by the end device or another switch, Keep in mind that honoring 802.1p for tagged traffic is enabled by default, while honoring ToS priorities must be enabled.

Based on the exact traffic flow that should be prioritized you can decide if you can configure TCP/UDP prioritization on one switch only or maybe you should go for VLAN or interface prioritization on both sides if the traffic of the applications is isolated in a separate VLAN or ports. Of course it is important to make sure that switch on the  far side is configured to honor the priority set by the near side.

I would advise to go through the whole QoS chapters for better understanding of the whole process before you decide how to design the QoS solution. 

[Emil_G]

Hello @yufopolu 

Did I answer your question? If I did, could you mark this thread as resolved? If you need any further clarification, please, let me know.