Shared Rate Mode; Dedicated Rate Mode Configurations For The 8-Gbps Modules - Cisco AP776A - Nexus Converged Network Switch 5020 Configuration Manual

Cisco mds 9000 family cli configuration guide - release 4.x (ol-18084-01, february 2009)
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Chapter 15
Configuring Generation 2 and Generation 3 Switching Modules
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
Table 15-5
modules.
Table 15-5
Configured Speed
Auto
4-Gbps
Auto with 2-Gbps maximum
2-Gbps
1-Gbps
Note
The 4-Port 10-Gbps Fibre Channel module ports in auto mode only support auto speed mode at 10 Gbps.

Shared Rate Mode

When port rate mode is configured as shared, multiple ports within a port group share data paths to the
switch fabric so that fabric bandwidth and related resources are shared. Often, the available bandwidth
to the switch fabric may be less than the negotiated operating speed of a port. Ports in this mode use local
buffering for the BB_credit buffers.
All ports in 4-Gbps Fibre Channel switching modules where bandwidth is shared support 1-Gbps,
2-Gbps, or 4-Gbps traffic. However, it is possible to configure one or more ports in a port group to
operate in dedicated rate mode with 1-Gbps, 2-Gbps or 4-Gbps operating speed.
All ports in the 48-Port and 24-Port 8-Gbps Fibre Channel switching modules where bandwidth is shared
support 1-Gbps, 2-Gbps, 4-Gbps, or 8-Gbps traffic.
In the 4/44-Port 8-Gbps Host-Optimized Fibre Channel switching module, all the ports where bandwidth
is shared support 1-Gbps, 2-Gbps, 4-Gbps in a maximum of 44 ports, or 8 Gbps in a maximum of 4 ports.

Dedicated Rate Mode Configurations for the 8-Gbps Modules

Table 15-2
3 Fibre Channel modules.
Table 15-6
Part Number
DS-X9248-96K9
DS-X9224-96K9
OL-18084-01, Cisco MDS NX-OS Release 4.x
show the amount of bandwidth reserved for a configured port speed on 4-Gbps switching
Bandwidth Reserved for the Port Speeds on Generation 2 Switching Modules
shows the maximum possible dedicated rate mode configuration scenarios for the Generation
Dedicated Rate Mode Bandwidth Reservation for Generation 3 Fibre Channel
Modules
Product Name/
Description
48-port 8-Gbps
Fibre Channel
switching module
24-port 8-Gbps
Fibre Channel
switching module
Reserved Bandwidth
4 Gbps
2 Gbps
1 Gbps
Dedicated
Maximum
Bandwidth
Allowed Ports
per Port
that can come up Ports in Shared Mode
8 Gbps
8 Ports
4 Gbps
24 Ports
2 Gbps
48 Ports
8 Gbps
8 Ports
4 Gbps
24 Ports
Cisco MDS 9000 Family CLI Configuration Guide
Port Groups and Port Rate Modes
All the remaining ports
are 8 Gbps shared.
All the remaining ports
are 8 Gbps shared.
15-7

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