GS728TXP (S3300-28X-PoE+) EOL Bonjour/mDNS issue

Hi ReneD :

Sorry for the delay response.

Yes, I finally solve the issue, it was combination of several parts need to be configured/upgrade.

1. 

I did get "official" 6.6.4.29 firmware from NetGear vendor, and upgrade all 10 S3300 to it, but still not passing mDNS.

2.

Checked setting, and configure all S3300 with:

A. Switching/Multicast/IGMP Snooping/IGMP Snooping Configuration:

- IGMP Snooping Status : enable

- Validate IGMP IP header: enable

B. Switchig/Multicast/IGMP Snooping/IGMP Snooping Interface Configuration:

- Enable Admin Mode to all interfaces

C. Switching/Multicast/IGMP Snooping/IGMP Snooping VLAN Configuration

- Enable Admin Mode to target VLAN

D. Switching/Multicast/IGMP Snooping/Multicast Router Configuration

- Enable Admin Mode on the Uplink interface

E. Switching/Multicast/IGMP Snooping Querier/Querier Configuration

- Enable Querier Admin Mode

- Leave all other default as 0.0.0.0/2/60.125

Also for their core M4300:

A. Switching/Multicast/IGMP Snooping/Configuration/IGMP Snooping Configuration

- Enable Admin Mode

- Enable Validate IGMP IP header

- Enable Proxy Querier Mode

B. Switching/Multicast/IGMP Snooping/Interface Configuration/IGMP Snooping Interface Configuration

- Enable Admin Mode to all interfaces

C. Switching/Multicast/IGMP Snooping/Multicast Router Configuration/Multicast Router Configuration

- Enable Admin Mode for all Edge Switch/Server Interfaces.

D. Switching/Multicast/IGMP Snooping/Querier Configuration/Querier Configuration

- Enable Querier Admin Mode

- Leave all other default as 0.0.0.0/2/60.125

E. Switching/Multicast/IGMP Snooping/Querier VLAN Configuration/IGMP Snooping Querier VLAN Configuration

- Enable Admin Mode on target VLAN

After all these, then all Casting devices connected on edge S3300 switches, their mDNS can be forward to all edges/core and servers/PC connected to edge/core switches.

Appreiciated with the help and effort, this is really an dated bug that just hit the project from nowhere, but now it has a solution and verified working !

Please let me know if more configration I can provide to make it more visible if someone else has similar issue.

Sincerely,

Billy Lee