Cisco MDS SanOS Troubleshooting Guide -- Troubleshooting Mixed Generation Hardware

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This section describes how to identify and resolve problems that might occur in the mixed generation hardware components of the Cisco MDS 9000 Family. It includes the following sections:

Overview

The below table identifies the modules supported by the Cisco MDS 9500 Series switches and Cisco MDS 9216A and Cisco MDS 9216i switches, as well as the Generation 2 switches:

Table 5-1 Generation 2 Modules and Switches

Part Number	Description
Modules
DS-X9148	48-port 4-Gbps Fibre Channel switching module
DS-9304-18K9	18-port 1/2/4-Gbps Fibre Channel switching module with 4 Gigabit Ethernet ports
DS-X9112	12-port 4-Gbps Fibre Channel switching module
DS-X9704	4-port 10-Gbps Fibre Channel switching module
DS-X9530-SF2-K9	Supervisor-2 module (Cisco MDS 9500 Series switches only)
Switches
DS-C9222i-K9	10-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
DS-9134-K9	34-port 4-Gbps Fibre Channel switch
DS-X9124	24-port 4-Gbps Fibre Channel switch
DS-9304-K9	18-port 1/2/4-Gbps Fibre Channel switch with 4 Gigabit Ethernet ports in fixed slot1

Note:

Generation 2 Fibre Channel switching modules are not supported on the Cisco MDS 9216 switch; however, they are supported by both the Supervisor-1 module and the Supervisor-2 module.

The 4-port 10-Gbps Fibre Channel switching module supports 10-Gbps port rates. The rest of the Generation 2 modules support 1-Gbps, 2-Gbps, 4-Gbps, or autosensing port rates.

For detailed information about the installation and specifications for these modules, refer to the hardware installation guide or the Configuration guides at the following website:

http://cisco.com/en/US/products/ps5989/tsd_products_support_series_home.html.

Port Groups

Each module has four groups of one or more ports in port groups that share common resources, such as bandwidth and buffer credits. The table below shows the port groups for the Generation 2 Fibre Channel switches and modules.

Table 5-2 Bandwidth and Port Groups for Generation 2 Modules

Module or Switch	Description	Number of Ports Per Port Group	Bandwidth Per Port Group	Maximum Bandwidth Per Port
DS-X9148	48-port 4-Gbps	12	12.8	4-Gbps¹
DS-X9124	24-port 4-Gbps	6	12.8	4-Gbps2
DS-9304-18K9	18-port/4-port 4-Gbps (MSM-18/4 module)	6	12.8	4-Gbps¹
DS-X9112	12-port 4-Gbps	3	12.8	4-Gbps¹
DS-X9704	4-port 10-Gbps	1	10	10-Gbps^²
DS-C9134-K9	32-port 4-Gbps	4	16	4-Gbps
DS-C9134-K9	2-port 10-Gbps	1	10	10-Gbps
DS-C9124	24-port 4 Gbps	6	12.8	4-Gbps
DS-C9222i-K9	18-port 4-Gbps	6	12.8	4-Gbps

¹Dedicated bandwidth with no oversubscription

²Dedicated bandwidth or oversubscribed using shared buffer resources.

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

The table below shows the port speeds allowed on each Generation 2 switching module.

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	Auto¹	Auto, dedicated

¹4-port 10-Gbps can be configured as auto mode, but only supports 10-Gbps connections.

Dynamic Bandwidth Management

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
10¹	10 Gbps

¹Available only on the 4-port 10-Gbps switching module.

Table 5-5 shows the bandwidth reserved based on port speed for ports in shared mode. Table 5-5 Bandwidth Reserved for Shared Mode

Module Type	Port Speed	Bandwidth Reserved
24-port 4-Gbps	Auto / 4 Gbps	1 Gbps
	Auto max 2000 / 2 Gbps	0.5 Gbps
	1 Gbps	0.25 Gbps
48-port 4-Gbps	Auto / 4 Gbps	0.8 Gbps
	Auto max 2000 / 2 Gbps	0.4 Gbps
	1 Gbps	0.2 Gbps

Out-of-Service Interfaces

Port Index Availability

Combining Modules and Supervisors

Initial Troubleshooting Checklist

Generation 1 and Generation 2 Issues

Module Does Not Come Online

Verifying Port Index Allocation Using Device Manager

Verifying Port Index Allocation Using the CLI

Cannot Configure Port in Dedicated Mode

Verifying Bandwidth Utilization in a Port Group Using Device Manager

Verifying Bandwidth Utilization in a Port Group Using the CLI

Cannot Enable a Port

Cannot Upgrade Supervisor System Image

Selecting the Correct Software Images

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