Limitations And Restrictions For Traffic Prioritization - Brocade Communications Systems 53-1001763-02 Administrator's Manual

Trunk Port ON
Long Distance ON
VC Link Init ..
Locked L_Port ..
Locked G_Port ..
Disabled E_Port ..
Locked E_Port ..
ISL R_RDY Mode ..
RSCN Suppressed ..
Persistent Disable ON
LOS TOV enable ..
NPIV capability ON
NPIV PP Limit 126 126 126 126
QOS E_Port AE
EX Port ..
Mirror Port ON
Rate Limit ..
Credit Recovery ON
Fport Buffers ..
Port Auto Disable ..
CSCTL mode ..
where AE:QoSAutoEnable, AN:AutoNegotiate, ..:OFF, NA:NotApplicable, ??:INVALID,
switch:admin> portcfgqos --enable 2
switch:admin> portcfgqos --enable 19

Limitations and restrictions for traffic prioritization

Note the following configuration rules for traffic prioritization:
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Fabric OS Administrator's Guide
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If a host and target are included in two or more QoS zones with different priorities, the zone
with the lowest priority takes precedence. For example, if an effective zone configuration has
QOSH_z1 (H,T) and QOSL_z2 (H,T), the traffic flow between H and T will be of low QoS priority.
Additionally, if QOSH_z1 (H,T) overlaps with a "domain,port" zone at the H port, the traffic flow
between H and T is dropped to medium priority and the H port is marked as a session-based
zoning port.
Traffic prioritization is enforced on the egress ports only, not on the ingress ports.
Traffic prioritization is not supported on 10 Gbps ISLs.
Traffic prioritization is not supported on mirrored ports.
Traffic prioritization is not supported over LSAN zones. The traffic is always medium priority in
the ingress edge fabric, the backbone fabric, and the egress edge fabric.
Traffic prioritization is not supported on a CryptoTarget container (redirection zone). See the
Fabric OS Encryption Administrator's Guide for information about redirection zones.
Traffic prioritization is not supported in McDATA Fabric Mode (interopmode 2) or Open Fabric
Mode (interopmode 3).
You must be running Fabric OS v6.3.0 or later to create QoS zones using D,I notation.
QoS zones using D,I notation are not supported for QoS over FCR.
QoS zones using D,I notation should not be used for loop or NPIV ports.
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