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5-3
Cisco MDS 9000 Family Troubleshooting Guide, Release 3.x
OL-9285-05
Chapter 5 Troubleshooting Mixed Generation Hardware
Overview
Note Port groups are defined by the hardware and consist of sequential ports. For example, ports 1 through
12, ports 13 through 24, ports 25 through 36, and ports 37 through 48 are the port groups on the 48-port
4-Gbps Fibre Channel switching modules.
Port Speed Mode
Table 5-3 shows the port speeds allowed on each Generation 2 switching module.
Dynamic Bandwidth Management
Table 5-4 shows the bandwidth reserved based on port speed for ports in dedicated mode.
Table 5-5 shows the bandwidth reserved based on port speed for ports in shared mode.
DS-C9124 24-port 4 Gbps 6 12.8 4-Gbps
DS-C9222i-K9 18-port 4-Gbps 6 12.8 4-Gbps
1. Dedicated bandwidth with no oversubscription
2. Dedicated bandwidth or oversubscribed using shared buffer resources.
Table 5-2 Bandwidth and Port Groups for Generation 2 Modules (continued)
Module or Switch Description
Number of
Ports Per
Port Group
Bandwidth Per Port
Group
Maximum
Bandwidth Per
Port
Table 5-3 Configurable Port Speeds on Generation 2 Switching Modules
Module Port Speed Modes Default Configuration
48-port 4-Gbps Auto, auto (max 2 Gbps), 1, 2, 4 Auto, shared
24-port 4-Gbps Auto, auto max 2000 (2 Gbps), 1, 2, 4 Auto, shared
12-port 4-Gbps Auto, auto max 2000 (2 Gbps), 1, 2, 4 Auto, dedicated
4-port 10-Gbps Auto
1
1. 4-port 10-Gbps can be configured as auto mode, but only supports 10-Gbps connections.
Auto, dedicated
Table 5-4 Bandwidth Reserved for Dedicated Mode
Port Speed Bandwidth Reserved per Port
Auto / 4 Gbps 4 Gbps
Auto max 2000 / 2 Gbps 2 Gbps
1 Gbps 1 Gbps
10
1
1. Available only on the 4-port 10-Gbps switching module.
10 Gbps
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