# VEDGE Fan trying to warm up to CEDGE
**URL:** https://forum.networklessons.com/t/vedge-fan-trying-to-warm-up-to-cedge/56192
**Category:** SD-WAN
**Created:** [March 24, 2025, 5:17pm UTC](https://forum.networklessons.com/t/vedge-fan-trying-to-warm-up-to-cedge/56192 "2025-03-24T17:17:13Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@gkorten](https://forum.networklessons.com/u/gkorten)
#### Post date: [March 24, 2025, 5:17pm UTC](https://forum.networklessons.com/t/vedge-fan-trying-to-warm-up-to-cedge/56192/1 "2025-03-24T17:17:13Z")
I have about 10 years of networking experience. I am replacing my Vedge 5000s with CEDGE 8500s. The Vedge has been solid in general. I had a few intermittent data plane issues that Cisco said were caused by elephant flows. I pushed about 2 Gbps of traffic between 5000s on a busy weekend. The Cedge has been very buggy. For example, I was trying to get Netflow to send to a collector and add the following to one of my overlay interfaces. IOS-XE SDWAN took the command and did not complain. I started getting flow. I had to remove the below from one of the interfaces; about 30 seconds after the commit, my 8500 crashed and rebooted. I also had an 8500L go into a reboot loop and revert to an older config once the IP flow was put on an interface. After working with a few different TAC engineers and getting a good one, I found out that this is not supported yet. The router took the config with no complaints.
DO NOT USE ON CEDGE 8500s:
```
ip flow monitor sdwan-flow-monitor output
ip flow monitor sdwan-flow-monitor input
```
Use:
```
policy flow-visibility
policy app-visibility
```
The above will update the sdwan section of the config.
---
### Author:  [@ReneMolenaar](https://forum.networklessons.com/u/ReneMolenaar)
#### Post date: [March 25, 2025, 11:01am UTC](https://forum.networklessons.com/t/vedge-fan-trying-to-warm-up-to-cedge/56192/2 "2025-03-25T11:01:55Z")
Hi Gregory,
That sounds like a frustrating experience. It’s good to hear you finally figured it out with the TAC engineers. Hopefully they’ll fix it in a future version…
Rene