3-8
Cisco MDS 9000 Family NX-OS Interfaces Configuration Guide
OL-29284-01, Release 6.x
Chapter 3 Configuring Fibre Channel Interfaces
Information About Fibre Channel Interfaces
Table 3-5 shows the bandwidth provided by the various port speed configurations on the 8-Gbps Fibre
Channel switching modules.
Table 3-6 shows the amount of bandwidth reserved for a configured port speed on 4-Gbps switching
modules.
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.
Auto with 2-Gbps maximum 2 Gbps
2-Gbps
1-Gbps 1 Gbps
Table 3-4 Bandwidth Reserved for the Port Speeds on Generation 4 Switching Modules
Configured Speed Reserved Bandwidth
Ta b l e 3-5 Bandwidth Reserved for the Port Speeds on Generation 3 Switching Modules
Configured Speed Reserved Bandwidth
Auto 8 Gbps
8-Gbps
Auto with 4-Gbps maximum 4 Gbps
4-Gbps
Auto with 2-Gbps maximum 2 Gbps
2-Gbps
1-Gbps 1 Gbps
Ta b l e 3-6 Bandwidth Reserved for the Port Speeds on Generation 2 Switching Modules
Configured Speed Reserved Bandwidth
Auto 4 Gbps
4-Gbps
Auto with 2-Gbps maximum 2 Gbps
2-Gbps
1-Gbps 1 Gbps
