Cisco MDS 9000 series Command Reference Manual page 935

Chapter 21 S Commands
S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m
is 2 Gbps. For the same interface, if autosensing with a maximum speed of 2 Gbps (auto max 2000) is
configured, then only 2 Gbps of bandwidth is reserved and the unused 2 Gbps is shared with the other
interface in the port group.
The 4-port 10-Gbps switching module only supports 10-Gbps traffic.
Note
Table 21-1
Table 21-1 Default Configurations, Credits, and Buffers
Switching Module
12 port
24 port
48 port
4 port
1. Auto speed negotiates to 1-, 2-, or 4-Gbps.
2. Auto port mode can operate as an E, TE, or Fx port.
3. Auto speed for a 4-port module negotiates to 10-Gbps.
When configuring port modes, observe the following guidelines:
•
•
•
•
•
When configuring PortChannels, observe the following guidelines:
•
•
•
•
•
•
OL-8413-07, Cisco MDS SAN-OS Release 3.x
lists the default configurations, credits, and buffers for switching modules.
Speed
1
Auto
1
Auto
1
Auto
3
Auto
Auto port mode and E port mode cannot be configured in shared rate mode.
The 4-port 10-Gbps module does not support FL port mode.
Generation 2 modules do not support TL port mode.
Shared to dedicated ports should be configured in this order: speed, rate mode, port mode, credit.
Dedicated to shared ports should be configured in this order: credit, port mode, rate mode, speed.
When an interface is out-of-service, it cannot be part of a PortChannel.
The 24-port module and the 48-port module support making ports out-of-service. In a shared
resource configuration, an out-of-service port reverts to its default values when it comes back into
service.
The maximum number of PortChannels for Generation-2 modules is 256.
The maximum number of PortChannels for a mixture of Generation-1 and Generation-2 modules is
128.
The number of PortChannels is independent of the type of supervisor module.
When adding a PortChannel to a configuration that uses both Generation-1 and Generation-2
modules, configure the PortChannel and Generation-2 interface speed to auto max 2000.
Port Mode
2
Auto
Fx
Auto
Fx
Auto
2
Auto
Rate Mode
Dedicated
Shared
Dedicated
Dedicated
Shared
Dedicated
Dedicated
Auto
Cisco MDS 9000 Family Command Reference
switchport
Credits
Min/Max/Default
2/250/250
1/16/16
1/250/16
2/250/250
1/16/16
1/250/16
2/250/125
2/250/250
21-67