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Cisco Employee

Access Points Joining 3850 next generation switches

It's my understanding that APs can join 3850s if and only if the APs are directly connected to ports on the 3850 next generation device.

Can someone point me to where this is explained?

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Hall of Fame Super Silver

Re: Access Points Joining 3850 next generation switches

Just to add, FlexConnect isn't part of converged access as the AP's terminate directly to the 3850's so there is no need for FlexConnect.

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-Scott
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30 REPLIES
Hall of Fame Super Silver

Re: Access Points Joining 3850 next generation switches

Well you need to make sure the 3850 is also a MC and has license.

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-Scott
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Cisco Employee

Re: Access Points Joining 3850 next generation switches

Scott, Can you point me to where it's documented that the APs need to be connected directly to one of the ports off that switch?


Hall of Fame Super Silver

Re: Access Points Joining 3850 next generation switches

Here is configuring mobility controller

http://www.cisco.com/en/US/docs/switches/lan/catalyst3850/software/release/3.2_0_se/mobility/configuration_guide/b_mobility_32se_3850_cg_chapter_01000.html#d4955e252a1635

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-Scott
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New Member

is there any update now to

is there any update now to this problem? I see that this post is 2 years old. is there any development after this? i have aironet 2600 CAPs scattered all over a building that am planning to connect to LAN BASE 3850 PoE switches and i have 3850 IP base as core switch to which the 3850 LAN base switches will be connected [back bone connection]. Will it b possible to make MC work in this scenario now? The AP licenses are installed on the core switch with  the IP base feature.

 

 

 

 

VIP Purple

In your case if all AP

In your case if all AP connect to a 3850 (MA), then they can register to it using licence available on 3850 as MC.

HTH

Rasika

New Member

Thank you Rasika, but am

Thank you Rasika, but am still not clear:  the LAN Base 3850 PoE switch has MA by default?  and access points connected to this can register onto the IP base 3850 switch which is acting as core switch and on which the AP licenses are installed? i.e. pass through is possible?

VIP Purple

In converged Access, License

In converged Access, License will be on MC can be anywhere in your network. Once AP connected to MA 3850 at your access layer, it will get license from MC & register that AP to MA.

You can refer this post, in that I have used 5760 as MC, but in your case it will be another 3850 switch in MC role.

http://mrncciew.com/2013/12/14/3850ma-with-5760mc/

 

AP passthrough is different where you can connect AP to 3850 (any vlan other than wireless management vlan on that switch). In that case AP won't register to 3850, you can point it to any centralized controller (2504,5500 or even 5760) & register those to that controller. This is useful when you have AP models that is not supported in IOS-XE platforms, but still you want to connect those into those switches & register to a supported controller

let us know any further queries.

HTH

Rasika

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New Member

Thank you for this response.

Thank you for this response. with passthrough future that means I can use a mix of 2960 series and 3850 series switches as  both support location awareness and mobility i.e. give borderless experience.

 

regarding your comment on whether the LAN base image of 3850 supports MA role or not, I have been checking and couldn't find definitive answer. The info I got say summarily that the LAN base image doesn't support Wireless Controller but doesn't mention MA support separately. for price sake I would go for the LAN base image, if this MA support can be confirmed by anyone.

http://www.router-switch.com/ws-c3850-24p-l-p-5214.html

 

 

VIP Purple

If you have LAN base 3850,

If you have LAN base 3850, try this

wireless management interface vlan x
wireless mobility controller ip x.x.x.x

If these two command accepts without any problem, then it should work as MA. But to be 100% I would configure MC as well & plug an AP to MA & see if that register.

Here is how you configure normal 3850 as MC

wireless mobility controller
wr
reload
!
wireless management interface vlan X
wireless mobility controller peer-group ABC
wireless mobility controller peer-group ABC member ip <MA_Wireless_Mgt_IP>

HTH

Rasika

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New Member

I actually have two ipbase

I actually have two ipbase 3850  non-poe switch which will be stacked and serve as core switch on to which the AP licenses will be copied. And the plan was to connect the APs to 2960 PoE switch which i have them already, with this not possible to make it work, 

a. I need to order another 3850 PoE IPbase or Lan base switch to connect the APs to

b. get a refund of the AP licenses and buy AIR-CT2504-50-K9.  The AP licenses have not yet been used, i.e. have not yet been copied to the core switch.

What do you think is the return policy of the cisco? a bit out context question!

thanks!

 

 

 

 

VIP Purple

I think option (b) is the

I think option (b) is the easiest way.

In fact there is a special promotion when you buy two APs (3702,2702 or 1702) you will get 2504 with 25 AP license almost free of cost. Here are the part numbers for those promotions 

AIR-AP3702I-UX-WLC
AIR-AP2702I-UX-WLC
AIR-AP1702I-A-WLC <- pick the correct regulatory domain AP model as per your country

HTH

Rasika

*** Pls rate all useful responses ****

VIP Purple

I overlooked "lanbase" image

I overlooked "lanbase" image component.

With that image, I do not think you can have MA role. You need to have min IPBase in order to the configuration given in the below post.

HTH

Rasika

Hall of Fame Super Silver

Re: Access Points Joining 3850 next generation switches

Might also want to review this

http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps12686/white_paper_c11-726107.html

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-Scott
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Cisco Employee

Re: Access Points Joining 3850 next generation switches

Scott,

I'm not sure why you included the link (Mobility Configuration Guide, Cisco IOS XE Release 3SE (Catalyst 3850 Switches))

-

Is this perhaps a way for Access Points that are not directly connected to the 3850 to join the Wirless Lan Controller portion  of the switch?

Hall of Fame Super Silver

Re: Access Points Joining 3850 next generation switches

No... If you are using the 3850 as the controller, it doesn't matter if the APs are connected to it or another 3850, you need ap license and you also have to define the 3850 as the MC.

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-Scott
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Cisco Employee

Re: Access Points Joining 3850 next generation switches

If Switch 1 is setup as a MC and switch 2 is setup as MA, you're saying APs connected to Switch 2 can join the MC of Switch 1?

Hall of Fame Super Silver

Re: Access Points Joining 3850 next generation switches

You need on MC... After that, all APs that connect to a 3850, will terminate to that switch. The MC is like the WLC function, its the brains.

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-Scott
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Cisco Employee

Re: Access Points Joining 3850 next generation switches

so if i have a 3850 mobility controller then access points connected to a 3850 mobility agent switch can in fact join that mc?

Cisco Employee

Re: Access Points Joining 3850 next generation switches

Thank you Scott for your responses above.

I now have a better understanding how this works.

Hall of Fame Super Silver

Re: Access Points Joining 3850 next generation switches

No problem. Hope I was able to she'd some light.

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-Scott
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New Member

Access Points Joining 3850 next generation switches

Can you non-directly connect APs to a 3850. For example if you had a multiple offices within one branch site and your 3850 MC was in the server rack and had 2960s in the other offices. Could you connect your APs to the 2960 switch and have them joined to the 3850 MC?

I've read that APs need to be directly connected to the 3850 however it supports flexconnect?

Would appreciate if anyone could shed some light.

Thanks,

Cisco Employee

Access Points Joining 3850 next generation switches

This hard-set requirement for

This hard-set requirement for APs to be directly attached really is a problem that is surely going to hold back many deployments.  It's very painful because it doesn't leave any options for old/legacy and new wireless to co-exist nicely.  I've looked at a few cases where next-generation wireless could go in, but this requirement has ruled every one of them out.

This restriction is an expecially big problem if you have a legacy 2500/5500 connected to your core switch and your core switch then has MA/MC functionality subsequently enabled.  This is because once a switch has MA or MC functionality enabled, all CAPWAP including legacy CAPWAP through the device is captured and redirected to the MA/MC switch for local termination (so it never reaches the legacy WLC).

From a practical perspective (I've tried this...) what happens in this scenario is that when the legacy AP tries to communicate via unicast to the legacy WLC, the MA/MC switch in between will intercept all of the CAPWAP even from non-connected APs and destined for the WLC, and proceed to terminate it locally.  The APs then get their upgraded image from the switch, and then when they go to connect again after a restart the switch will refuse to let them join (since they are not directly connected).

In other words, they're basically hosed at that point - and won't come online without repriming.

What is required is an option on a per-port or per-vlan basis of the switch to -not- intercept CAPWAP traffic so that traffic from legacy uplinks and to/from legacy WLCs is not subject to this interception.  This would then provide a way to migrate between old and new wireless and carefully manage a migration process.

I've seen in the release notes that there is some ethernet tunneling capability in WLC 8.1, so I wonder if that will help.  I haven't looked into it yet but that might be a way to get around the problem, assuming it also isn't intercepted by the MA on the way through too.

In 3.6 and 3.7 code, you can

In 3.6 and 3.7 code, you can prevent a switch from intercepting capwap by putting the AP on a VLAN other than the VLAN defined for wireless management.

 

We do this today to flip APs from 3850 MA/MC to a central 5508.  So this limitation that has you so concerned is not a valid limitation anymore.

New Member

Hi Jacob are you saying that

Hi Jacob are you saying that I can still plug the APs in to 2960 PoE switch and manage to control them from 3850 WLC?  

What I'm saying is that you

What I'm saying is that you can interoperable the two and allow the capwap through the core switch to the airespace controller. IRCM works across both platforms, so there is a valid mixed environment model.

Re: Access Points Joining 3850 next generation switches

The 3850 and 5760 controllers do not support Flexconnect at this time. Only Airespace controllers support Flexconnect/HREAP today.

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Re: Access Points Joining 3850 next generation switches

Good call jake +5

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__________________________________________________________________________________________ "Satisfaction does not come from knowing the solution, it comes from knowing why." - Rosalind Franklin ___________________________________________________________
Hall of Fame Super Silver

Re: Access Points Joining 3850 next generation switches

Just to add, FlexConnect isn't part of converged access as the AP's terminate directly to the 3850's so there is no need for FlexConnect.

Sent from Cisco Technical Support iPhone App

-Scott
*** Please rate helpful posts ***
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