Alcatel-Lucent AOS-W 6.5.3.x - Mdns AP VLAN Aggregation

1031| AirGroup AOS-W 6.5.3.x| User Guide
mDNS APVLANAggregation
In the AirGroup solution, all mDNS/SSDP packets are terminated in a switch. The AirGroup solution works as a
unicast querier and responder on behalf of mDNS/SSDP devices and eliminates the propagation of multicast
mDNS/SSDP traffic in the WLAN.
When a wired mDNS/SSDP device is part of a VLAN which is not trunked in a switch, L2 connectivity does not
exist between the wired mDNS/SSDP device and the switch. In such a scenario, the mDNS/SSDP packets from
the wired mDNS/SSDP device does not reach the switch or from the switch to the wired mDNS/SSDP device.
Hence, AirGroup does not discover these wired mDNS/SSDP devices.
The mDNS APVLANaggregation allows the discovery of wired mDNS/SSDP devices which do not have L2
connectivity with the switch or which do not trunk in the switch. An AP, which is in the same VLAN as the wired
mDNS/SSDP device which does not trunk in the switch, receives and forwards the mDNS/SSDP packets from
the wired mDNS/SSDP devices to the switch and from the switch to the wired mDNS/SSDP device. The AP
forms a separate split tunnel (0x8000)with the switch and aggregates all mDNS/SSDP traffic to and from the
switch.
n The split tunnel is formed only when both AP Multicast Aggregation (under AP System Profile) and
AirGroup parameters are enabled. If either AP Multicast Aggregation or AirGroup parameter is
disabled, the split tunnel is not formed.
n The AP Multicast Aggregation parameter is disabled by default.
n When AP Multicast Aggregation parameter is enabled from disabled state, an mDNS/SSDP device
discovery packet is sent to the VLAN in which the split tunnel is created if the AirGroup parameter is also
enabled.
n If an AP is provisioned with an uplink VLAN, then the split tunnel between the AP and the switch is formed
with the uplink VLAN, otherwise the native VLAN is used.
n When the native VLAN is changed, the tunnel is recreated.
n Irrespective of which VLAN (uplink VLANor native VLAN)is used, the split tunnel is in the same VLAN as the
wired mDNS/SSDP devices.
n Configure the VLAN in which the wired mDNS/SSDP device terminates in the switch. Do not create an SVI or
attach a port to the VLAN.
Configuring mDNS APVLAN Aggregation
Use the following procedures to configure mDNS APVLANaggregation:
In the WebUI
Following different network topologies are possible to configure APmulticast aggregation for allowed VLANs:
1. If AP uplink is an access port with access VLAN x, the AP performs mDNS aggregation for VLAN x. Perform
following configuration:
l Create VLAN on switch using command vlan x.
l Configure native VLAN ID in system profile as vlan x.
l Enable parameter APMulticast Aggregation in ap-system profile.
2. If AP uplink is a trunk port with native VLAN as x (that is, uplink-VLAN is not configured for AP), the AP
performs mDNS aggregation for VLAN x. Perform following configuration:
l Create VLAN on switch using command vlan x.
l Configure native VLAN ID in system profile as vlan x.
l Enable parameter APMulticast Aggregation in ap-system profile.