Cisco Cisco MDS 9000 NX-OS Software Release 6.2
The FCNS bulk notification and coalesce switch RSCN features are supported only in NX-OS Release
6.2(7) and later releases. The switch coalesce RSCN should be enabled only if all the switches in the fabric
are Cisco MDS switches that are running MDS NX-OS Release 6.2(7) or later.
6.2(7) and later releases. The switch coalesce RSCN should be enabled only if all the switches in the fabric
are Cisco MDS switches that are running MDS NX-OS Release 6.2(7) or later.
Note
Limitation 2
The maximum zone database size has been increased from 2 MB to 3.8 MB in Cisco MDS Release 6.2(7) and later for all MDS 9700
Series switches to enable zone scale enhancements. The new limit of 16000 zones is supported on an MDS 9700-only fabric. Fabrics
with Cisco MDS 9500, 9200, or 9100 Series switches continue to have the 2-MB zone database limit, supporting only up to 8000
zones.
Series switches to enable zone scale enhancements. The new limit of 16000 zones is supported on an MDS 9700-only fabric. Fabrics
with Cisco MDS 9500, 9200, or 9100 Series switches continue to have the 2-MB zone database limit, supporting only up to 8000
zones.
Limitation 3
In a three-node serial topology, traffic imbalance may occur if the number of port channels configured between the switches are the
same. It is recommended to have a single port channel between two switches with any number of member ports. If more than one
port channel is configured, ensure that the count of port channels between the switches varies.
same. It is recommended to have a single port channel between two switches with any number of member ports. If more than one
port channel is configured, ensure that the count of port channels between the switches varies.
Limitation 4
The maximum latency (round-trip time) and packet drop supported on FCIP links is 100 ms round trip and 0.05% packet drop.
The limit is the same regardless whether latency and packet drop conditions exist together or only one of
them exists.
them exists.
Note
Syslog and Warnings for Fibre Channel Network Scale
The below table provides syslogs and warnings for the Fibre Channel network.
Table 4: FC Fabric Scale-Related Syslog and Warning
Cisco MDS 9500, 9200, and 9100
Cisco MDS 9700 Series
Syslog and Warnings
8000 zones – Hard limit: Syslog warning that states
no more zones can be configured:
no more zones can be configured:
“Maximum configurable zone
limit of 8,000 reached.
Creation of any more zones
is not supported.
limit of 8,000 reached.
Creation of any more zones
is not supported.
”
10400 zones – Hard limit for Cisco MDS 9500 Series
Supervisor-2A Module: Syslog warning that states
no more zones can be configured:
Supervisor-2A Module: Syslog warning that states
no more zones can be configured:
“Maximum configurable zone
limit of 10,400 reached.
Creation of any more zones
is not supported.
limit of 10,400 reached.
Creation of any more zones
is not supported.
”
16000 zones – Hard limit: Syslog warning
that states no more zones can be configured:
that states no more zones can be configured:
“Maximum configurable zone
limit of 16,000 reached.
Creation of any more zones
is not supported.
limit of 16,000 reached.
Creation of any more zones
is not supported.
”
Zone limit
7