This article explains:
1. Need for VLAN Pooling in IAP
2. Configuring VLAN Pool in IAP
4. What we cannot achieve using VLAN pooling
VLAN Pooling is a new feature added in OS version 220.127.116.11_3.2.0. Any version prior to this does not have the VLAN Pooling feature.
In a single IAP cluster, there can be a large number of clients in the same VLAN. This leads to a high level of broadcasts in the same subnet. The solution to this is to partition the network into reasonably-sized subnets and use L3-mobility between those subnets, when clients roam. However, there are various situations, like simple network design considerations, where a large number of clients need to be in the same subnet. VLAN pooling provides a solution in such scenarios. Each client is randomly assigned a VLAN from a pool of
VLANs on the same SSID, thereby automatically partitioning a single broadcast domain of clients into multiple VLANs.
VLAN Pooling ensures client gets the same VLAN across all APsin the cluster.
NOTE: VLAN Pooling and L3 Mobility cannot be used together. Also, random VLAN assignment algorithm does not ensure even distribution of clients.
Environment : This article applies to all IAPs running OS version 18.104.22.168_3.2.0.
Navigate to New WLAN > VLAN tab > Static > Assign VLAN ID
Client VLAN assignments can be viewed in CLI and in Support UI by checking the AP association table