FabricPath Configuration Guide, Cisco DCNM for LAN, Release 5.x
Configuring Advanced FabricPath Features
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Configuring Advanced FabricPath Features

Table Of Contents

Configuring Advanced FabricPath Features

Information About FabricPath Advanced Features

Information About Advanced FabricPath Layer 2 IS-IS Configurations

High Availability

Licensing Requirements for FabricPath Advanced Features

Platform Support

Configuring FabricPath Advanced Features

Configuring IS-IS Processes

Displaying Statistics for Optional IS-IS Process Configurations

Configuring IS-IS Interfaces

Field Descriptions for FabricPath Optional Configurations

ISIS Processes: ISIS Process Settings: Basic Settings Section

ISIS Processes: ISIS Process Settings: LSP/SPF Settings Section

ISIS Interfaces: ISIS Interface Settings: Basic Settings Section

ISIS Interfaces: ISIS Interface Settings: Adjacency Status Section

Feature History for Configuring FabricPath Advanced Features Using DCNM


Configuring Advanced FabricPath Features


You can do advanced configurations using FabricPath for the FabricPath Intermediate System-to-Intermediate System (IS-IS) protocol.

This chapter includes the following sections:

Information About FabricPath Advanced Features

Licensing Requirements for FabricPath Advanced Features

Platform Support

Configuring FabricPath Advanced Features

Field Descriptions for FabricPath Optional Configurations

Feature History for Configuring FabricPath Advanced Features Using DCNM

Information About FabricPath Advanced Features


Note You must have an F Series module in your chassis to run FabricPath.


This section includes the following sections:

Information About Advanced FabricPath Layer 2 IS-IS Configurations

High Availability

Information About Advanced FabricPath Layer 2 IS-IS Configurations


Note See Chapter 3 "Configuring FabricPath Switching" for information on the default Layer 2 IS-IS behavior with FabricPath.


We recommend that you run the FabricPath network using the default Layer 2 IS-IS configurations.

Optionally, you can also change many of the IS-IS settings. You change these settings as follows:

Globally on the entire device and on each device in the FabricPath network

On specified FabricPath interfaces within the FabricPath network

If you do change any of the FabricPath Layer 2 IS-IS settings, ensure that you make the same changes for those global parameters on every device in the FabricPath network and for those interface parameters on every applicable FabricPath interface in the network.

Layer 2 IS-IS is based on Layer 3 IS-IS with enhancements to run on Layer 2. The commands for Layer 2 IS-IS and Layer 3 IS-IS are not the same. Layer 2 IS-IS is the control plane in FabricPath and a single protocol controls all unicast and multicast traffic. From a forwarding standpoint, FabricPath Layer 2 IS-IS forwards traffic for unicast, unknown unicast, broadcast, and multicast frames. Using Layer 2 IS-IS, the system maintains loop-free paths throughout the FabricPath network. (see Chapter 3 "Configuring FabricPath Switching" for information on default FabricPath Layer 2 IS-IS behavior and Chapter 5 "FabricPath Forwarding" for information on FabricPath forwarding.)

You can use these advanced FabricPath Layer 2 IS-IS configurations to fine-tune the operation of the FabricPath network.

High Availability

The FabricPath topologies retain their configuration through ISSU.

See the Cisco Nexus 7000 Series NX-OS High Availability and Redundancy Guide, Release 5.x, for more information on high availability.

Licensing Requirements for FabricPath Advanced Features

The following table shows the licensing requirements for this feature:

Product
License Requirement

Cisco NX-OS

FabricPath requires an Enhanced Layer 2 license. For a complete explanation of the Cisco NX-OS licensing scheme, see the Cisco Nexus 7000 Series Licensing Guide.

Cisco DCNM

FabricPath requires no license. Any feature not included in a license package is bundled with the Cisco DCNM and is provided at no charge to you. For an explanation of the Cisco DCNM licensing scheme, see the Cisco DCNM Installation and Licensing Guide.


Platform Support

The following platform supports this feature. For platform-specific information, including guidelines and limitations, system defaults, and configuration limits, see the corresponding documentation.

Platform
Documentation

Cisco Nexus 7000 Series Switches

Cisco Nexus 7000 Series Switches Documentation


Configuring FabricPath Advanced Features


Note You must have FabricPath enabled on the devices.
You must make these configurations on each switch that you want to participate in the FabricPath network


This section describes how to configure optional FabricPath Layer 2 IS-IS parameters and includes the following topics:

Configuring IS-IS Processes

Configuring IS-IS Interfaces

Configuring IS-IS Processes

You can modify the default settings for the FabricPath Layer 2 IS-IS process values.

BEFORE YOU BEGIN

Ensure that you have enabled FabricPath.

Ensure that you are working on the F Series module.

DETAILED STEPS


Step 1 From the Feature Selector pane, choose Switching > Fabricpath > ISIS Processes to open the ISIS Processes pane.

Step 2 From the Contents pane, in the Summary pane, click the device in which you want to configure the IS-IS process values.

The system highlights the device in the Summary pane, and tabs appear in the Details pane.

Step 3 In the Details pane, click the ISIS Process Settings tab.

Step 4 Click the Basic Settings section.

a. In the Switch Id field, enter the value you want for the switch ID.

b. In the Authentication Settings area, enable or disable the authentication, select the type, and enter the keychain information.

c. In the Other Settings area, enter the values you want for Root Priority, Reference Bandwidth, and Maximum Paths and check to enable Graceful Restart, Log Adjacency Check, and Dynamic Hostname.

Step 5 Click the LSP/SPF Settings section.

a. In the LSP Settings area, enter the values you want for MTU, Initial Wait, Second Wait, and Maximum Wait.

b. In the SPF Settings area, enter the values you want for Initial Wait, Second Wait, and Maximum Wait.

Step 6 (Optional) From the menu bar, choose File > Deploy to apply your changes to the device.


Displaying Statistics for Optional IS-IS Process Configurations

You display statistics for the FabricPath Layer 2 IS-IS processes.

BEFORE YOU BEGIN

Ensure that you have enabled FabricPath.

Ensure that you are working on the N7K-F132XP-15 module.

DETAILED STEPS


Step 1 From the Feature Selector pane, choose Switching > Fabricpath > ISIS Processes to open the ISIS Processes pane.

Step 2 From the Contents pane, in the Summary pane, click the device for which you want to display statistics.

The system highlights the device in the Summary pane, and tabs appear in the Details pane.

Step 3 In the Details pane, click the Statistics tab.

Step 4 From the menu bar, choose New Chart > Fabricpath ISIS Traffic Statistics Chart.

a. In the Fabricpath ISIS Traffic Statistics area, click Select Parameters.

b. Choose the received, sent, retransmit, and error counts that you want for the CSNP PDUs, LAN PDUs, LSP PDus, P2P PDUs, and PSNP PDUs.

The statistics display.

Step 5 From the menu bar, choose New Chart > Fabricpath ISIS Process Statistics Chart.

a. In the Fabricpath ISIS Process Statistics area, click Select Parameters.

b. Choose the parameters you want to display for LSP and Others.

The statistics display.


Configuring IS-IS Interfaces

You can modify the default settings for the FabricPath Layer 2 IS-IS basic configurations and display some adjacency information.

BEFORE YOU BEGIN

Ensure that you have enabled FabricPath.

Ensure that you are working on the N7K-F132XP-15 module.

DETAILED STEPS


Step 1 From the Feature Selector pane, choose Switching > Fabricpath > ISIS Interfaces to open the ISIS Interfaces pane.

Step 2 From the Contents pane, in the Summary pane, click the device in which you want to configure the IS-IS Interface values.

Step 3 Click on one of the following to choose the interface type:

Physical Interfaces

Portchannels.

Step 4 Click the module and the interface that you want.

The system highlights the interface in the Summary pane, and tabs appear in the Details pane.

Step 5 In the Details pane, click the Fabricpath ISIS Interface Settings tab.

Step 6 Click the Basic Settings section.

a. In the Basic Settings field, choose the Fabricpath topology from the drop-down menu and enter the metric you want for the selected interface.

b. In the Authentication Settings area, enable or disable the authentication, select the type, and enter the keychain information.

c. In the Interval Settings area, enter the values that you want for CSNp Interval, LSP Interval, Retransmit Interval. and Retransmit Throttle Interval.

d. In the Hello Packets area, enable or disable the Hello Padding and enter the values that you want for the Hello Interval and the Hello Multiplier.

Step 7 Click the Adjacency Settings section to display topology and adjacency status of the interface and its neighbor.

Step 8 (Optional) From the menu bar, choose File > Deploy to apply your changes to the device.


Field Descriptions for FabricPath Optional Configurations

These field descriptions are used for configuring the FabricPath optional features that fine-tune FabricPath. This section includes the following topics:

ISIS Processes: ISIS Process Settings: Basic Settings Section

ISIS Processes: ISIS Process Settings: LSP/SPF Settings Section

ISIS Interfaces: ISIS Interface Settings: Basic Settings Section

ISIS Interfaces: ISIS Interface Settings: Adjacency Status Section

ISIS Processes: ISIS Process Settings: Basic Settings Section

Table 6-1 ISIS Processes: ISIS Processes Settings: Basic Settings Section 

Field
Description

Fabricpath ISIS Process

Display only. Name of the FabricPath Layer 2 IS-IS process.

Fabricpath Topology IDs

Display only. Topology associated with the FabricPath Layer 2 IS-IS process.

Switch ID

Switch-ID for the device in the FabricPath topology.

Note The system automatically assigns the switch-ID when you enable FabricPath. You can manually override that assignment and assign you own switch ID, which must be unique for that device in that FabricPath topology.

Authentication Setting

Auth. Check

Status of authentication check: enabled or disabled.

Type

Type of authentication. Choose one of the following:

None

Text authentication

Md5

Keychain

Keychain used for authentication by the FabricPath Layer 2 IS-IS process

Other Settings

Root Priority

Value for the root priority of the FabricPath Layer 2 IS-IS process. The range is from 1 to 255.

Ref. Bandwidth (mbps)

Value for reference bandwidth of the FabricPath Layer 2 IS-IS process. The range is 1 to 4000.

Maximum Paths

Value for maximum paths of the FabricPath Layer 2 IS-IS process. The range is from 1 to 16.

Graceful Restart

Enables graceful restart for the FabricPath Layer 2 IS-IS process.

Log Adjacency Check

Sends a long message when the state of an FabricPath Layer 2 IS-IS neighbor changes.

Dynamic Hostname

Allows FabricPath Layer 2 IS-IS process to set hostname dynamically.


ISIS Processes: ISIS Process Settings: LSP/SPF Settings Section

Table 6-2 ISIS Processes: ISIS Processes Settings: LSP/SPF Settings Section

Field
Description
LSP Settings (in Secs)

MTU

MTU of the link state PDUs for the FabricPath Layer 2 IS-IS process. the range is 128 to 4352.

Initial Wait

Initial wait of the link state PDUs for the FabricPath Layer 2 IS-IS process. The range is 50 to 120,000.

Second Wait

Second wait of link state PDUs for the FabricPath Layer 2 IS-IS process. The range is 50 to 120,000.

Maximum Wait

Maximum wait of link state PDUs for the FabricPath Layer 2 IS-IS process. The range is 50 to 120,000.

SPF Settings (in Secs)

Initial Wait

Initial wait of the shortest-path first PDUs for the FabricPath Layer 2 IS-IS process. The range is 50 to 120,000.

Second Wait

Second wait of the shortest-path first PDUs for the FabricPath Layer 2 IS-IS process. The range is 50 to 120,000.

Maximum Wait

Maximum wait of the shortest-path first PDUs for the FabricPath Layer 2 IS-IS process. The range is 50 to 120,000.


ISIS Interfaces: ISIS Interface Settings: Basic Settings Section

Table 6-3 ISIS Interfaces: ISIS Interface Settings: Basic Settings Section 

Field
Description
Basic Settings

Interface Name

Display only. Name of FabricPath interface.

Topology ID

Topologies. Add or remove the topologies you want here.

Metric

Interface metric when interface participates in FabricPath Layer 2 IS-IS. The range is 0 to 16,777,215.

Fabricpath Mode

Display only. FabricPath.

Operational Status

Display only. Operational status of FabricPath interface, one of the following:

Up

Down

Authentication Settings

Auth. Check

Authentication status for the selected interface: enable or disable.

Type

Authentication type for the selected interface. The choices are as follows:

None

Md5 Authentication

Text Authentication

Keychain

Keychain information used for authentication for the selected interface.

Interval Settings

CSNP Interval

Interval for Complete Sequence Number Packets. The range is from 1 to 65535.

LSP Interval

Interval for link state PDUs. The rang is from 10 to 65535.

Retransmit Interval

Interval at which retransmission will be done. The range is from 1 to 65535.

Retransmit Throttle Interval

Interval for the retransmit throttle. The range is from 20 to 65535.

Hello Packets

Hello Padding

Hello padding for the selected interface: enabled or disabled.

Hello Interval

Interval at which the hello packets are sent. The range is from 1 to 65535.

Hello Multiplier

Multiplier value for the hello packets. The range is from 3 to 1,000.


ISIS Interfaces: ISIS Interface Settings: Adjacency Status Section

Table 6-4 ISIS Interfaces: ISIS Interface Settings: Adjacency Status Section 

Field
Description

Topology ID

Display only. Topology ID for the selected interface.

Metric

Display only. Topology-specific metric value for the selected interface.

Adjacency Status

Display only. Adjacency status for the selected interface for a specific topology. The possible values are as follows:

Up

Down

Init

Fabricpath Topology Status

Display only. Topology status for the selected interface for a specific topology. The possible values are as follows:

Up

Down

Neighbour Details

Adjacency Status

Display only. Adjacency status of the neighbor interface for the selected interface.The possible values are as follows:

Up

Down

Init

L2 topology Status

Display only. Topology status of the neighbor interface for the selected interface. The possible values are as follows:

Up

Down


Feature History for Configuring FabricPath Advanced Features Using DCNM

Table 6-5 lists the release history for these features.

Table 6-5 Feature History for FabricPath

Feature Name
Releases
Feature Information

FabricPath

5.1(1)

These features were introduced.