Users Guide

1030| AirGroup Dell Networking W-Series ArubaOS 6.5.x| User Guide
Controller Model Number of mDNS Servers
W-7024 600
W-7010 500
W-7005 300
In a multi-controller deployment with AirGroup solution:
l The local controller sends the response from an mDNS device for iChat service to other controllers in the
cluster. This is in addition to local controller performing L2 multicast of the message to all VLANs.
l The corresponding controller multicasts the message to all the VLANs that are trunked in it.
l When a user moves from one controller to another controller, two user entries exist in the user cache for
the same user until the user entry is deleted from the first controller. The two user entries exist because the
IP address, which is part of the mDNS payload, changes when a user moves from one controller to another
controller. If IP mobility is enabled, only one user entry exists because the user retains the IP address across
the controllers.
Configuring mDNS Multicast Response Propagation
Use the following procedures to enable or disable mDNS multicast response propagation:
In the WebUI
To enable iChat using the controller WebUI:
1. Navigate to Configuration > Advanced Services > AirGroup.
2. Under Services, select the checkbox next to chat.
3. Click Enable.
4. Click Apply.
In the CLI
To enable iChat using the controller WebUI:
(host) (config) #airgroup service chat enable
Troubleshooting and Log Messages
Controller Troubleshooting Steps
Use the following procedure to prevent potential errors in a controller:
1. Execute the show airgroup internal-state statistics CLI command and ensure that the Sibyte
Messages Sent/Recv counters increment over a period of time.
2. Enable mDNS logs using the logging level debugging system process mdns command, and capture the
output of show log system all when the issue occurs. Review any obvious error print statements.
3. Save the output of show airgroup cache entries and show airgroup cppm entries and look for any
discrepancies.