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:

Contents


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 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-Gbps2

DS-C9134-K9

32-port 4-Gbps

4

16

4-Gbps

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

1 Dedicated bandwidth with no oversubscription

2 Dedicated bandwidth or oversubscribed using shared buffer resources.

Note 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

1 4-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

1 Available 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

Note Note: When migrating a host only supporting up to 2-Gbps traffic to the 4-Gbps switching modules, use autosensing with 2-Gbps maximum bandwidth.
Note Note: The 4-port 10-Gbps switching module only supports 10-Gbps links.

Out-of-Service Interfaces

You can take interfaces out of service to release shared resources that are needed for dedicated bandwidth. This feature is especially useful for the 48-port 4-Gbps switching modules. When an interface is taken out of service, all shared resources are released and made available to the other interface in the port group or module.

Caution Caution: If you need to bring an interface back into service, you might disrupt traffic if you need to release shared resources from other interfaces.

Port Index Availability

Each chassis in the Cisco MDS 9000 Series has a hardware-based maximum port availability based on internally assigned port indexes. When the maximum number of port indexes is reached in a chassis, any modules remaining or added to the chassis will not boot up. The number of physical ports on a Fibre Channel module is equal to its number of port indexes. However, for Gigabit Ethernet modules (IPS-8, IPS-4, and MPS-14/2), one physical port is equal to four port indexes (one port index for iSCSI and three port indexes for FC IP tunnels). Table 5-6 lists the physical ports and port indexes (virtual ports) allocated per Cisco MDS 9000 module.

Table 5-6 Port Index Allocation

Module

Physical Ports

Port Indexes Allocated

48-port 4-Gbps Fibre Channel switching module

48

48

24-port 4-Gbps Fibre Channel switching module

24

24

12-port 4-Gbps Fibre Channel switching module

12

12

4-port 10-Gbps Fibre Channel switching module

4

4

16-port 2-Gbps Fibre Channel module

16

161

32-port 2-Gbps Fibre Channel module

32

321

8-port Gigabit Ethernet IP Storage services module

8

321

4-port Gigabit Ethernet IP Storage services module

4

32 (with Supervisor-1)16 (with Supervisor-2)

32-port 2-Gbps Fibre Channel Storage Services Module (SSM).

32

321

14-port Fibre Channel/2-port Gigabit Ethernet Multiprotocol Services (MPS-14/2) module

162

32 (with Supervisor-1)22 (with Supervisor-2)

1 All Generation 1 modules reserve port indexes on fixed boundaries with Supervisor-1. See Table 5-7.

2 Fourteen Fibre Channel ports and two Gigabit Ethernet ports.

Using any combination of modules that include a Generation 1 module or a Supervisor-1 module limits the port index availability to 252 on all Cisco MDS 9500 Series directors. Generation 1 modules also require contiguous port indexes where the system assigns a block of port index numbers contiguously starting from the first port index reserved for the slot that the module is inserted in (See Table 5-7). This means that while there may be enough port indexes available for a Generation 1 module, the module may not boot up because the available port indexes are not in a contiguous range or the contiguous block does not start at the first port index for a given slot.

Example 5-1 shows a case with a Supervisor-1 module, where a 48-port Generation 2 module borrowed port indexes from the first slot. Slot 1 still has 16 port indexes available, but the full 32 indexes are no longer available (28-31 are used by the module in slot 4). This means that no Generation 1 module except a 16-port Fibre Channel switching module can be inserted into slot 1 because some of the port indexes for the slot are already in use.

Example 5-1 Borrowing Port Indexes from Another Slot </p>

<a name="wp93012"></a>
switch#<span style="color: Black; font-style: normal; font-weight: bold">show port index-allocation
</span>
<a name="wp93389"></a>
Module index distribution:
<a name="wp93390"></a>
---------------------------------------------------+
<a name="wp93391"></a>
Slot   | Allowed |      Alloted indices info       |
<a name="wp93392"></a>
       |  range* | Total |          Index values   |
<a name="wp93393"></a>
-------|---------|-------|-------------------------|
<a name="wp93394"></a>
1      |   <span style="color: Black; font-style: normal; font-weight: bold">0-  31|   -   |   -      </span>               |
<a name="wp93395"></a>
2      |  32-  63|   32  |   32-63                 |
<a name="wp96732"></a>
3      |  64-  95|   48  |   64-95,224-239         |
<a name="wp96733"></a>
4      |  <span style="color: Black; font-style: normal; font-weight: bold">96- 127|   48  |  96-127, 240-252, 28-31 |
</span>
<a name="wp96734"></a>
7      | 128- 159|   32  |   128-159               |
<a name="wp93399"></a>
8      | 160- 191|   32  | 160-191                 |
<a name="wp94609"></a>
9      | 192- 223|   32  | 192-223                 |
<a name="wp93401"></a>
SU     | 253-255 |   3   |  253-255                |
<a name="wp85683"></a>
*Allowed range applicable only for Generation-1 modules 
<a name="wp93550"></a><br />
<a name="wp94812"></a>

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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