Brocade Fabric OS v7.2.0d Release Notes v1.0

Fabric OS v7.2.0d Release Notes v1.0 Page 50 of 52
Area
Comments
Manageability
It is suggested that Port Fencing be used to avoid taking ports down for normal
fabric events. The recommended fencing criteria and settings are:
Criteria
Value
ITW (Invalid Transmission Words)
25 per minute
CRC (Cyclical Redundancy Check)
3 per hour
Protocol Errors
2 per minute
State Change
7 per minute
Link Reset
3 per minute
Note: Port fencing should not be set for C3 discards.
While Port fencing is supported in v7.2.0d, it is recommended that all System z
customers enable MAPS after upgrading to FOS v7.2.0d using the default
aggressive policy, “dflt_aggressive_policy”.
Manageability
As a "Best Practice" for deploying FOS switches/directors into a FICON
environment, verify the FOS version shipped with the most current FOS
recommendation. It is recommended to update all FOS switch/directors to the
same FOS levels for production.
Manageability
FMS must be enabled on the local switch for the remote CUP to work.
Manageability
The FICON merge wizard feature in Network Advisor cannot be used to merge a
48000 with a DCX, DCX-4S, DCX8510-8, or a DCX8510-4.
Manageability
When setting insistent domain ID on a switch using the FICON Configuration
Wizard, the switch will always be taken offline and insistent domain ID set, even if
insistent domain ID is already set.
Optics
When configuring inter-switch links (ISLs) between a 16G platform and an 8G
platform, the ISL ports must be configured for E-Port only.
Serviceability
zDAC may not give reliable results. The SIOCA tool run from HMC on System z
performs a similar function and therefore may not give reliable results as well.
Traffic Isolation Zones
Under certain circumstances, enabling multiple Traffic Isolation Zones with failover
disabled may cause some frames to be dropped due to the timing of when paths
are re-routed while the zones are being implemented. To avoid this, all Traffic
Isolation Zones should be enabled with failover enabled first so that all desired
routes are established.
Traffic Isolation Zones
Assistance from service support should be sought before attempting to configure
and enable this feature.
Virtual Fabrics
Assistance from service support should be sought before attempting to enable
Virtual Fabrics or use the XISL (Base Switch ISL) capability.
Virtual Fabrics
If a port gets assigned a port address of 0xFE in an Open System logical switch, an
RSCN will be sent by FOS on behalf of port address 0xFE during CP failover or
firmware download. This may result in an IFCC for any FCP channel running traffic
to port address 0xFE.