max sdwan tunnels supported

[avdheshkumar]

Hi All,

plannign to deploy sdwan for around 100 sites with cat8300 routers at each site. can you help me with the max number of tunnels supported .

Regards,

Avdhesh 

[Flavio Miranda]

Hi

  You can check on this device datasheet but the capacity will not be given in tunnels capacity but in IPSEC capacity. Which, on this router, is " Up to 5 Gbps of IPSec".

https://www.cisco.com/c/en/us/products/collateral/routers/catalyst-8300-series-edge-platforms/datasheet-c78-744088.html 

But, the place you really need to worry when design SDWAN is the controller capacity.

For example:

"On-Premise deployments can be hosted on either ESXi or KVM hypervisors, with even the smallest footprint requiring a minimum of 16 vCPUs, 32GB of dedicated RAM and 500GB of storage. Now you can see why the cloud hosted option is so appealing. A single vManage instance can support up to 2,000 devices and can be deployed as part of a cluster containing 6 instances."

https://www.lookingpoint.com/blog/cisco-sdwan-architecture-components 

[cdoughty]

So, there isn't a maximum number of tunnels then?  I would think each tunnel would add CPU and Memory consumption to maintain the BFD telemetry, keep-alive, etc.  If you have 100 sites each with 2 transports unrestricted, that would be nearly 400 tunnels on each device.

[pdebreczeni]

For the record, there is a limitation, check Table 3. in the datasheet. "SD-WAN Overlay Tunnels scale"