Dedicated Rate Mode - Cisco AP776A - Nexus Converged Network Switch 5020 Configuration Manual

Port Groups and Port Rate Modes
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 15-3
Part Number
DS-C9124
(Cisco MDS 9124
Fabric switch)
DS-C9222i-K9
(Cisco MDS 9222i
Multiservice
Modular switch)
1. Shared rate mode is supported on Fx ports only and no ISLs.
2. All ports in a 48-port 4-Gbps switching module can operate in dedicated rate mode with a 1-Gbps operating speed. However,
3. All ports in a 24-port 4-Gbps switching module can operate in dedicated rate mode with a 2-Gbps operating speed. However,

Dedicated Rate Mode

When port rate mode is configured as dedicated, a port is allocated required fabric bandwidth and related
resources to sustain line rate traffic at the maximum operating speed configured for the port. In this
mode, ports do not use local buffering and all receive buffers are allocated from a global buffer pool (see
the
Table 15-4
Channel switching modules.
Table 15-4
Configured Speed
Auto
8-Gbps
Auto with 4-Gbps maximum
4-Gbps
Auto with 2-Gbps maximum
2-Gbps
1-Gbps
Cisco MDS 9000 Family CLI Configuration Guide
15-6
Port Rate Mode Support on Generation 2 and Generation 3 Modules and Switches
Product Name/
Description
24-port 4-Gbps Fabric
3
switch
18-port 4-Gbps Fibre
Channel switch with
4-Gigabit Ethernet IP
storage services ports, and
a modular expansion slot to
host Cisco MDS 9000
Family Switching and
Services Modules
if you configure one or more ports to operate in 2-Gbps or 4-Gbps dedicated rate mode, some of the other ports in the port
group would have to operate in shared mode.
if you configure one or more ports to operate in 4-Gbps dedicated rate mode, some of the other ports in the port group would
have to operate in shared mode
"Buffer Pools" section on page
shows the bandwidth provided by the various port speed configurations on the 8-Gbps Fibre
Bandwidth Reserved for the Port Speeds on Generation 3 Switching Modules
Chapter 15 Configuring Generation 2 and Generation 3 Switching Modules
Supports
Dedicated Rate
Mode
Yes
Yes
15-9).
Reserved Bandwidth
8 Gbps
4 Gbps
2 Gbps
1 Gbps
Supports Default Speed
Shared Rate Mode and Rate
Mode Mode on All Ports
No Auto, Dedicated
Yes Auto, Shared
OL-18084-01, Cisco MDS NX-OS Release 4.x