Configuring Oversubscription Ratio Restrictions - Cisco AP776A - Nexus Converged Network Switch 5020 Configuration Manual

Configuring Module Interface Shared Resources
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
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fc7/37
fc7/38
fc7/39
fc7/40
fc7/41
fc7/42
fc7/43
fc7/44
fc7/45
fc7/46
fc7/47
fc7/48

Configuring Oversubscription Ratio Restrictions

The 48-port and 24-port 4-Gbps, and all 8-Gbps Fibre Channel switching modules support
oversubscription on switches with shared rate mode configurations. By default, all 48-port and 24-port
4-Gbps, and 8-Gbps Fibre Channel switching modules have restrictions on oversubscription ratios
enabled. As of Cisco SAN-OS Release 3.1(1) and NX-OS Release 4.1(1), you can disable restrictions
on oversubscription ratios.
Table 15-20
on the 4-Gbps and 8-Gbps modules.
Table 15-20
Switching
Module
48-Port 8-Gbps
Fibre Channel
Module
24-Port 8-Gbps
Fibre Channel
Module
4/44-Port
8-Gbps
Host-Optimized
Fibre Channel
Module
48-port 4-Gbps
Fibre Channel
switching
module
24-port 4-Gbps
Fibre Channel
switching
module
Cisco MDS 9000 Family CLI Configuration Guide
15-40
describes the bandwidth allocation for oversubscribed interfaces configured in shared mode
Bandwidth Allocation for Oversubscribed Interfaces
Configured Speed
Auto 8 Gbps
Auto Max 4 Gbps
Auto Max 2 Gbps
Auto 8 Gbps
Auto Max 4 Gbps
Auto Max 2 Gbps
8 Gbps
Auto Max 4 Gbps
Auto Max 2 Gbps
1 Gbps
Auto 4 Gbps
Auto Max 2 Gbps
1 Gbps
Auto 4 Gbps
Auto Max 2 Gbps
1 Gbps
Chapter 15 Configuring Generation 2 and Generation 3 Switching Modules
Buffers (Gbps)
32 4.0
32 4.0
32 4.0
32 4.0
32 4.0
32 4.0
32 4.0
32 4.0
32 4.0
32 4.0
32 4.0
32 4.0
Reserved Bandwidth (Gbps)
Ratios enabled
0.36
0.24
0.12
0.8
0.4
0.2
0.87
0.436
0.218
0.109
0.8
0.4
0.2
1
0.5
0.25
shared
shared
shared
shared
shared
shared
shared
shared
shared
shared
shared
shared
Maximum
Bandwidth
Ratios disabled (Gbps)
0.2 8
0.1 4
0.05 2
0.8 8
0.4 4
0.2 2
0.16 8
0.08 4
0.04 2
0.02 1
0.09 4
0.045 2
0.0225 1
0.27 4
0.135 2
0.067 1
OL-18084-01, Cisco MDS NX-OS Release 4.x