Can 240AC and 1850i coexist in same VLAN?

[maweigel]

i have an existing network of 1850i access points with Mobility Express. 

Can i add 240AC access points to the same VLAN? 

Can they coexist in the same VLAN, or even join to each other?

[Leo Laohoo]

As long as they do not "see" each other.

[maweigel]

How to i achieve that? e.g. what should i filter?

[Leo Laohoo]

Get a wireless placement design done correctly.

[marce1000]

  - You are probably talking about a mixed wireless environment : it is not advisable to do that because then you have to allocate bands and channels manually to avoid conflicts.Also the 250AC can not join a mobility express based controller. Better is to use the single controller only (wirh compatible capwap APs) , tothe have the controller regulate all the wireless network resources,

 M.

[maweigel]

Unfortunately, this is kind of complicated.

This is an existing installation of dozends of 1850i. Now a few more APs should be added. 1850 are not available any more, so i have to use 240AC. I can add them, so they do not see the others on the RF side. My problem is, if they can be on the same VLAN on the wired side.

I also cannot just replace all the existing APs.

[marce1000]

 I don' think it will be a problem  if they use the same vlan in essence but then another problem could arise for unique address management for clients. I would use another VLAN. The overall solution is not ideal : If the wireless network keeps groing , then go for the 9800 controller and compatible APs. You can already start with the virtual controller , if desired ,

 M.

[Rich R]

The technical details of the SMB products are not well documented anywhere so not possible to say whether they're using any of the same protocols on the LAN side but I would be prepared for the possibility that you might need to keep them on separate VLANs for example if they both use the same VRRP group by default.

[maweigel]

i guess just about every mobility express installation faces this question at some point in time.

Has really nobody ever tested this?

[marce1000]

  - Perhaps it's also worth nothing that ME technology is also EOL : https://www.cisco.com/c/en/us/products/collateral/wireless/aironet-2700-series-access-point/eos-eol-notice-c51-738143.html

  Including 8.10 as last software version. The document proposes the EWC capable AP's , which contain the 9800 as a 'small form factor'

 M.