Cisco MDS 9000 Family Release Notes for Cisco MDS SAN-OS Release 3.2(2c) (OL14116-03, November 2007)

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Cisco MDS 9000 Family Release Notes for Cisco MDS SAN-OS Release 3.2(2c)
OL-14116-03
Limitations and Restrictions
QoS on an MDS 48-port Fibre Channel Module
Due to possible differences in parts per million between the MAC ASICs on both sides of an ISL link,
there is a potential throughput issue when running QoS over an ISL on an MDS 48-port Fibre Channel
module. Specifically, the user may not see traffic throughput that follows the programmed QoS ratios.
The throughput ratio on the high and/or medium priority class of service (COS) relative to the low
priority COS, may not be as high as the actual programmed ratio.
If this situation occurs, you can move the ISL to a port on a different port group on one and/or both sides
of the link, or move the ISL to a port on a lower-density card if you require accurate QoS ratios.
Maximum Number of Zones Supported in Interop Mode 4
In interop mode 4, the maximum number of zones that is supported in an active zone set is 2047, due to
limitations in the connected vendor switch.
When IVR is used in interop mode 4, the maximum number of zones supported, including IVR zones,
in the active zone set is 2047. The limit for the maximum number of IVR zones per VSAN is 250 zones
(two members per zone).
Configuring Default Settings for the Default Zone
Following an upgrade from any Cisco SAN-OS 2.x release to any Cisco SAN-OS 3.x release, the
configuration defined by the zone default-zone permit vsan vsan-id command is applied only to the
active VSAN. The configuration does not apply to unconfigured VSANs. In SAN-OS 3.x, you can apply
the configuration to unconfigured VSANs by issuing the system default zone default-zone permit
command.
Similarly, the zoneset distribute full vsan vsan-id command applies only to the active VSAN following
an upgrade from any Cisco SAN-OS 2.x release to any Cisco SAN-OS 3.x release.
Although you can configure the default-zone settings in the setup script, these settings do not take effect
for VSAN 1, because VSAN 1 already exits prior to running the setup script. To configure the default
settings for the default-zone in VSAN 1, you must explicitly enter the zone default-zone permit
command.