RCSP Study Guide - In-path Networks
The Steelhead appliance can be physically connected to access both ports and trunks. When the Steelhead appliance is placed on a trunk, the In-path interface has to be able to tag its traffic with the correct VLAN number. The supported trunking protocol is 802.1q (“Dot1Q”).
A tag can be assigned via the GUI or the CLI. The CLI command for this is:
HOSTNAME (config) # in-path interface inpathx_x vlan