cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
Announcements

Choose one of the topics below for Cisco DNA Center Resources to help you on your journey with Cisco DNA Center

This community is for technical, feature, configuration and deployment questions.
For production deployment issues, please contact the TAC!
We will not comment or assist with your TAC case in these forums.

3476
Views
5
Helpful
7
Replies
Beginner

DNA Fusion Router - Device Model

Hi everyone!

 

I've looked over the official list of DNA compatible devices. However, I have not found a document outlining the requirements for a device to be considered for the role of the Fusion router. From reading through documentation, I can gather the Fusion will need to perform the following:

- IP routing

- Support for dynamic routing protocols (ISIS, BGP, EIGRP, etc.)

- VRF support

- Route redistribution

 

Since these requirements can be met using a true router (ISR/ASR) or a L3 switch (Catalyst), what devices have been used in environments (lab/prod)?

 

Just looking to see what devices have been tested and are viable options...

 

Thanks!

Everyone's tags (2)
1 ACCEPTED SOLUTION

Accepted Solutions
Highlighted
Cisco Employee

Re: DNA Fusion Router - Device Model

we don't have a documentation for compute requirements of fusion router. we only have the configuration guide. link to it is following:

 

https://www.cisco.com/c/en/us/support/docs/cloud-systems-management/dna-center/213525-sda-steps-to-configure-fusion-router.html

View solution in original post

7 REPLIES 7
Cisco Employee

Re: DNA Fusion Router - Device Model

DNA-SDA solution requires Fusion router.

Today the Dynamic Network Architecture Software Defined Access (DNA-SDA) solution requires a fusion router to perform VRF route leaking between user VRFs and Shared-Services, which may be in the Global routing table (GRT) or another VRF. Shared Services may consist of DHCP, Domain Name System (DNS), Network Time Protocol (NTP), Wireless LAN Controller (WLC),  Identity Services Engine (ISE), DNAC components which must be made available to other virtual networks (VN’s) in the Campus. Thus by creating Border Gateway Protocol (BGP) peerings from the Border Routers to the Fusion Routers, on the Fusion Router the fabric VRF’s subnets which need access to these shared services will be leaked into GRT, and vice-versa. Route maps can be used to help contain routing tables to subnets specific to SDA Fabric.

Beginner

Re: DNA Fusion Router - Device Model

Thank you. On top of the logical requirements, are there any compute or memory requirements? Does the certain Fusion device need a certain amount of memory or CPU in order to handle all the processes taking place?
Cisco Employee

Re: DNA Fusion Router - Device Model

The memory and processing requirements are load balanced as the control plane functionality is automated.
DNA Center automates the configuration of the control plane functionality. For redundancy, you should deploy two control plane nodes to ensure high availability of the fabric, as a result of each node containing a duplicate copy of control plane information. The devices supporting the control plane should be chosen to support the HTDB, CPU, and memory needs for an organization based on fabric endpoints.

Beginner

Re: DNA Fusion Router - Device Model

I see the explanation is for the control plane node. However, I am looking for compute requirements of the fusion router.

Is there any documentation available for that?
Highlighted
Cisco Employee

Re: DNA Fusion Router - Device Model

we don't have a documentation for compute requirements of fusion router. we only have the configuration guide. link to it is following:

 

https://www.cisco.com/c/en/us/support/docs/cloud-systems-management/dna-center/213525-sda-steps-to-configure-fusion-router.html

View solution in original post

Beginner

Re: DNA Fusion Router - Device Model

Thank you. For the future, I would recommend providing a document on compute requirements or, at the minimum, a list of recommended devices that can be used as the Fusion router role. I know the Fusion router isn't necessary part of the fabric, but it plays a vital role during the planning phases of rolling out DNA.

Enthusiast

Re: DNA Fusion Router - Device Model

Is this for a lab or production network? If the latter, then a Cisco firewall makes more sense than fusion router, cost permitting. Better to punt inter-VRF traffic up to the firewalls, thereby properly securing the networks from one another, which is presumably the aim of separate VRFs in the first place. You only need to factor in the stateful performance hit on the firewall - i.e. not IPS. Try to keep VRFs to a minimum and rely more on TrustSec.

CreatePlease to create content
Content for Community-Ad
July's Community Spotlight Awards