Brocade Communications Systems 53-1001763-02 License requirements for traffic prioritization

404 Fabric OS Administrator’s Guide

53-1001763-02

QoS: SID/DID traffic prioritization

NOTE

If there is a single low priority flow to a destination ID (DID) and several medium priority flows to that

same DID, then it is possible that the medium priority flows would have less bandwidth because they

have to share the medium priority VCs, whereas the low priority flow would have a separate VC.

License requirements for traffic prioritization

License requirements are different for 4 Gbps and 8 Gbps platforms:

•4 Gbps platforms

Do not require a license: Brocade 4100, 4900, 5000, 7500, 7500E, 7600, and 48000.

You must manually enable QoS on 4 Gbps ports.

•8 Gbps platforms

SID/DID traffic prioritization is a licensed feature for the 8 Gbps platforms: Brocade 300,

5100, 5300, 5410, 5424, 5450, 5460, 5470, 5480, 7800, 8000, VA-40FC, DCX, DCX-4S, and

Brocade Encryption Switch.

An Adaptive Networking license must be installed on every 8 Gbps switch that is in the path

between a configured device pair.

When you install the Adaptive Networking license, QoS is automatically enabled on 8 Gbps

ports, except for long-distance 8 Gbps ports. For long-distance 8 Gbps ports, you must

manually enable QoS after you install the license.

This section applies only to 8 Gbps ports that are not long-distance ports.

If 8 Gbps ports are part of an active trunk group before the Adaptive Networking license is added,

ISLs are formed without QoS.

When you install the Adaptive Networking license, QoS is automatically enabled on all 8 Gbps ports

for which you have not manually disabled QoS, so the 8 Gbps ports in the trunk group are set to

QoS enabled by default.

Adding the license does not immediately affect the trunk groups. The trunks continue without QoS

until the next time one of the ISLs is toggled, at which point the toggled ISL comes up with QoS

enabled and splits from the trunk group because of a QoS mismatch.

To preserve existing trunk groups, before you install the Adaptive Networking license, manually

disable QoS on these 8 Gbps ports.

NOTE

QoS is disabled by default on 4 Gbps ports and long-distance 8 Gbps ports. The following procedure

does not apply to these ports.

1. Connect to the switch and log in as admin.

2. Display the ISL information using the following command:

islshow