The Citrix NetScaler Gateway uses the configured Mapped IP (MIP) and Subnet IP addresses to build its own routing table and determine the different IP subnets that are connected to each network interface of the NetScaler. Each network interface of the NetScaler can be connected to multiple IP subnets.
Assigning VLAN tags directly to the interfaces might prevent the NetScaler from accessing one or more subnets if the VLAN tags are not configured correctly. It is advisable to assign each VLAN to an individually configured Virtual IP (VIP) address or SNIP address on the NetScaler.
This recipe will show you how to assign VLANs to the configured IP addresses on the CNG.
To assign VLAN IDs to the NetScaler ...