Configure Multiple WAN Interfaces on Cisco SD-Routing Devices Using a Custom VRF
Control Connections to Cisco Catalyst SD-WAN Manager
In an SD-Routing network, any WAN interface associated with a VRF establishes a control connection to the Cisco Catalyst SD-WAN Manager.
You can now create a custom VRF that hosts one or more WAN interfaces. You can extend this functionality to create multiple custom VRFs with each VRF hosting multiple WAN interfaces. These WAN interfaces now function as transport interfaces to establish control connections to the Cisco Catalyst SD-WAN Manager. Having multiple WAN interfaces ensures that there is resiliency in control connections and routing of transport traffic.
Types of WAN Interfaces for Control Connections
You can create custom VRFs in the Transport and Management profile and attach multiple WAN interfaces to it. These interfaces can be of type:
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All types of physical ethernet interface
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Unbound loopbacks
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Bounded loopbacks
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Port-channels
These interfaces when configured can establish control connections to the Cisco Catalyst SD-WAN Manager.
Preference Value for Control Connection
If you have configured multiple WAN interfaces for a one or more VRFs, you can set a preference for which of these multiple WAN interfaces form a control connection with Cisco Catalyst SD-WAN Manager.
This preference is set using the Connection Preference value in Cisco Catalyst SD-WAN Manager. This preference value determines the order in which each of the multiple WAN interfaces can form a control connection with the Cisco Catalyst SD-WAN Manager.
Steps to Set Up WAN Interfaces with a Custom VRF
Configuring WAN interfaces with a custom VRF involves these steps:
Configure a Custom VRF
You can create custom VRFs with one or more WAN interfaces.
To specify a value for the parameters required for configuring a VRF, choose Global, or Device Specific from the drop-down list and then proceed with specifying the required value.
Procedure
Step 1 | On the Cisco Catalyst SD-WAN Manager, select Configuration > Configuration Groups. Select the solution type as SD Routing. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Step 2 | Select a configuration group from the list that is displayed. Create a new Transport and Management profile or select an existing profile. Select the profile, click on … and select Edit. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Step 3 | Click Add New Feature, and select VRF to create a custom VRF. Click Add New to enter these details: To specify a value for the parameters required for configuring a VRF, choose Global, or Device Specific from the drop-down list. Basic Configuration
DNS
Host Mapping
IPv4 Static Route
IPv6 Static Route
NAT
Route Leak from Global VRF
Redistribution (in VRF)
Route leak to Global VRF
Redistribution (in VRF)
Route Leak from other Service VRF(s)
Redistribution (in Service VRF)
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Step 4 | Click Save. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Step 5 | Repeat the process to create additional custom VRFs. |
What's next
After configuring the custom VRF, proceed with Adding WAN interfaces to the custom VRF.
Add Interfaces to a Custom VRF
Before you begin
To specify a value for the parameters required for configuring an interface, choose Global, or Device Specific from the drop-down list .
Procedure
Step 1 | Select the custom VRF and click the + symbol. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Step 2 | Select Ethernet Interface to create a new WAN interface for this custom VRF. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Step 3 | Specify the details for the WAN interface:
IPV4 /IPv6 Settings
BFD
ARP (Optional)
ACL (Optional)
Advanced
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Step 4 | Click Save. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Step 5 | Repeat the process to create additional WAN interfaces. |
Associate and Deploy the Configuration Group to an SD-Routing Device
Before you begin
Procedure
Step 1 | On Cisco SD-WAN Manager, select the Configuration Group created earlier. |
Step 2 | Click + Add and select the devices from the list. Click Save to attach the configuration group to the selected devices. |
Step 3 | To provision the configuration changes, click Deploy.
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Monitor Custom VRF
This section provides details on how to monitor a custom VRF using commands and Cisco Catalyst SD-WAN Manager.
Monitor Custom VRF Using Cisco Catalyst SD-WAN Manager
The Monitor dashboard helps you monitor the different components and services of an SD-Routing network
Before you begin
Procedure
Step 1 | On the Cisco Catalyst SD-WAN Manager, choose Monitor > Devices. Select a device from the list. |
Step 2 | Select Control Connections to view information about the control connections from the SD-Routing device to the Cisco Catalyst SD-WAN Manager. |
Step 3 | To view the control connections in real time, select choose Real Time from the left pane. From Device Options, select the parameter you want to view. For example, to view real time information about control connections, choose one of these parameters.
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Monitor Custom VRF Sessions Using Commands
Use these commands to monitor the global VRF, custom VRFs and the associated WAN interfaces.
Use command |
To |
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show sd-routing control connections summary |
display active control plane connections to Cisco Catalyst SD-WAN Manager. |
show sd-routing control local-properties wan ipv4 |
display IPv4 related information about local control properties of WAN interfaces. |
show platform software sd-routing vdaemon vrfs |
display all the VRFs configured for the device. |
show sd-routing control local-properties wan detail |
display detailed information about local control properties of WAN interfaces. |
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