Re: mDNS gateway on 9800-40 with IOS-XE 17.9.5

kerstin-534 · ‎05-29-2024

Has someboy mDNS gateway on 9800-40 with IOS-XE 17.9.5 get working ?

We have on Ethernet trunk to WLAN Controller, packet capture shows all necessary mDNS queries/responses from clients and printers an so on the wired side of the controller. The problem is that only one service from the wired side is shown in cache, other services from the same type and vlan not shown in cache and not shown in debug.

No SVIs configured as stated in release notes. mDNS gateway enabled on WLAN

mDNS gateway with Flexconnect APs work without any problems, also with services in other vlans.

marce1000 · ‎05-29-2024

- You may find this informative : https://community.cisco.com/t5/wireless/9800-and-mdns-to-wired-network/m-p/3985637#M201580

M.

-- Each morning when I wake up and look into the mirror I always say ' Why am I so brilliant ? '
When the mirror will then always repond to me with ' The only thing that exceeds your brilliance is your beauty! '

kerstin-534 · ‎05-29-2024

Does somebody know the real answer ?

kerstin-534 · ‎05-29-2024

workaround

https://bst.cisco.com/bugsearch/bug/CSCwd59093?rfs=qvlogin

Rich R · ‎05-30-2024

Thanks for the update @kerstin-534 - I've added a note about CSCwd59093 to the thread @marce1000 linked to.

Note that this is already covered in the config guide:
https://www.cisco.com/c/en/us/td/docs/wireless/controller/9800/17-9/config-guide/b_wl_17_9_cg/m_mdns_gateway.html
- Wireless multicast link-local is enabled by default. When wireless link-local is enabled, only mDNS Bridging mode is supported. If you require mDNS Gateway for wired services, disable wireless link-local.

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TAC recommended codes for AireOS WLC's and TAC recommended codes for 9800 WLC's
Best Practices for AireOS WLC's, Best Practices for 9800 WLC's and Cisco Wireless compatibility matrix
Check your 9800 WLC config with Wireless Config Analyzer using "show tech wireless" output or "config paging disable" then "show run-config" output on AireOS and use Wireless Debug Analyzer to analyze your WLC client debugs
Field Notice: FN63942 APs and WLCs Fail to Create CAPWAP Connections Due to Certificate Expiration
Field Notice: FN72424 Later Versions of WiFi 6 APs Fail to Join WLC - Software Upgrade Required
Field Notice: FN72524 IOS APs stuck in downloading state after 4 Dec 2022 due to Certificate Expired
- Fixed in 8.10.196.0, latest 9800 releases, 8.5.182.12 (8.5.182.13 for 3504) and 8.5.182.109 (IRCM, 8.5.182.111 for 3504)
Field Notice: FN70479 AP Fails to Join or Joins with 1 Radio due to Country Mismatch, RMA needed
How to avoid boot loop due to corrupted image on Wave 2 and Catalyst 11ax Access Points (CSCvx32806)
Field Notice: FN74035 - Wave2 APs DFS May Not Detect Radar After Channel Availability Check Time
Leo's list of bugs affecting 2800/3800/4800/1560 APs

kerstin-534 · ‎06-05-2024

works for me: "no wireless multicast link-local"

mDNS gateway wired (when controller uses multicast over multicast) works perfect with Apple Clients (eg Iphone), but Android 12 (eg Samsung Galaxy) cannot see any mDNS services anymore. Androids cannot see any mDNS services with gateway enabled, the can see all services when briding enabled.

What could be the problem with Androids and mDNS gateway ?

Can

Konstantin Kabassanov · ‎06-18-2024

It does not work for me (in 17.9.5). There should be some additional configuration in your setup that mine is missing... Should I be able to see mdns announcements from the wired network in a packet capture from the controller over the corresponding SVI vlan interface?

Konstantin Kabassanov · ‎06-18-2024

Please, ignore my previous post...