Configuring Dense Wavelength Division Multiplexing

This chapter includes the following topics:

Information About DWDM

Dense Wavelength-Division Multiplexing (DWDM) multiplexes multiple optical carrier signals on a single optical fiber. DWDM uses different wavelengths to carry various signals.

To establish a DWDM link, both ends of an Inter Switch Link (ISL) need to be connected with DWDM SFPs (small form-factor pluggable) at each end of the link. To identify a DWDM link, DCNM-SAN discovers the connector type on the Fiber Channel (FC) ports. If the ISL link is associated with the FC ports at each end, then the FC port uses DWDM SFP to connect the links.

Cisco DCNM for SAN discovers FC ports with DWDM SFPs and the ISLs associated with the FC ports. The DCNM-SAN Client displays ISL with DWDM attribute on the topology map.

Note The Fabric Shortest Path First (FSPF) database only displays an ISL link, which is connected with DWDM SFPs at both ends.

Configuring X2 DWDM Transceiver Frequency

Restrictions

This feature is supported only in MDS 9134 modules. With MDS 9134 modules, the 10-Gigabit Ethernet ports must be in a down state when you configure the X2 transceiver frequency.

To configure X2 DWDM transceiver frequency for a module, follow these steps:

 
Command
Purpose

Step 1

switch# config t

Enters configuration mode.

Step 2

switch(config)# module 1 transceiver-frequency x2-eth

Configures the link to fuction as X2 Ethernet.

switch(config)# module 1 transceiver-frequency x2-fc

 

Configures (default) the link to function as X2 FC.

To configure the X2 DWDM transceiver frequency using Device Manager, follow these steps:

Step 1 From the Device Manager menu bar, select Physical > Modules .

The module configuration window is displayed.

Step 2 Choose an XcvrFrequencyConfig option button.

Step 3 Click Apply .

 

To configure the X2 DWDM transceiver frequency, follow these steps:

Step 1 From the Physical Attributes pane, select Hardware .

The module configuration window is displayed.

Step 2 Click the Card Module Config tab.

Step 3 In the X2 XcvrFrequencyConfig column, choose an option.

Step 4 Click Apply .

 

Monitoring DWDM Links

The DCNM-SAN Client displays DWDM links with a “dash-dash” pattern. The tooltip for the link displays “DWDM” to indicate its link type.

To view the DWDM link, follow these steps:

Step 1 Select the switch in the Logical Domain region.

Step 2 Select ISL in the Physical Attribute s region.

The Information pane diplays the ISL’s information.

Step 3 Click the Physical tab.

You see the ISL in the Information pane.

The ISL’s Physical table displays the connector type as sfpDwdm .

Move the mouse over the link to see the tooltip as DWDM indicating the link type.

Step 4 Perform a Dump Discovery of ISL to list all ISLs. DWDM links are listed with [DWDM].

 

Field Descriptions for DPVM

This section displays the following field descriptions for this feature.

DPVM Actions

 

Field
Description

Action

Helps in activating the set of bindings.

Result

Indicates the outcome of the activation.

Status

Indicates the state of activation. If true, then activation has been attempted as the most recent operation. If false, then an activation has not been attempted as the most recent operation.

CopyActive to Config

When set to copy(1), results in the active (enforced) binding database to be copied on to the configuration binding database. The learned entries are also copied.

Auto Learn Enable

Helps to learn the configuration of devices logged into the local device on all its ports and the VSANs to which they are associated.

Auto Learn Clear

Assists in clearing the auto-learnt entries.

Clear WWN

Represents the port WWN (pWWN) to be used for clearing its corresponding auto-learned entry.

DPVM Config Database

 

Field
Description

Type

Specifies the type of the corresponding instance of cdpvmLoginDev object.

WWN or Name

Represents the logging in device.

VSAN Id

Represents the VSAN to be associated to the port on the local device on which the device represented by cdpvmLoginDev logs in.

Switch Interface

Represents the device alias.

DPVM Active Database

 

Field
Description

Type

Specifies the type of the corresponding instance of cdpvmEnfLoginDev.

WWN or Name

Represents the logging in device address.

VSAN Id

Represents the VSAN of the port on the local device through which the device represented by cdpvmEnfLoginDev logs in.

Interface

Represents the device alias.

IsLearnt

Indicates whether this is a learned entry or not. If true, then it is a learned entry. If false, then it is not.

Additional References

For additional information related to implementing VSANs, see the following section:

Related Document

 

Related Topic
Document Title

Cisco MDS 9000 Family Command Reference

Cisco MDS 9000 Family Command Reference

Standards

 

Standard
Title

No new or modified standards are supported by this feature, and support for existing standards has not been modified by this feature.

–

RFCs

 

RFC
Title

No new or modified RFCs are supported by this feature, and support for existing RFCs has not been modified.

–

MIBs

 

MIBs
MIBs Link

No new or modified MIBs are supported by this feature, and support for existing MIBs has not been modified by this feature.

To locate and download MIBs, go to the following URL:

http://www.cisco.com/dc-os/mibs