A brouter is a single port VLAN, which can route packets of particular protocol and bridge packets for other protocols. The brouter is not part of any spanning tree group (STG) and it is always in the forwarding state.
The IPX brouter bridges packets of any other protocol. The IPX brouter is similar to an IP brouter in its functionality. The basic difference between IP and IPX brouter is that, the IPX packet can be of any one among four Ethernet frame formats namely: EthernetII, 802.2-LLC, 802.3-RAW, and 802.3-SNAP.The protocol used is determined by the encapsulation that you specify
A single port can act both as an IP and an IPX brouter and can also be part of any other port-based VLAN.