Intermec MobileLAN 21 Series System Manual page 107

MAC frames originating on the home IP subnet are encapsulated in the root access
point, forwarded through the IP network, unencapsulated by the access point at the
remote end of the IP tunnel, and forwarded to the appropriate access point (if necessary)
for delivery to the destination end device. For inbound frames, the same process is used
in reverse between the access point at the remote end of an IP tunnel and the root access
point.
Certain frame types are never forwarded through tunnels. Frame types that are never
forwarded include IP frames used for coordinating routers and MAC frames used for
coordinating bridges. Frame types that are never forwarded include:
•
802.1D bridge frames
•
Proprietary VLAN switch frames
•
IP frames with a broadcast or multicast Ethernet address
•
IP frames with the following router protocol types and decimal values:
•
DGP (86) (Dissimilar Gateway Protocol)
•
EGP (8) (Exterior Gateway Protocol)
•
IDPR (35) (Inter-Domain Policy Routing Protocol)
•
IDRP (45) (Inter-Domain Routing Protocol)
•
IGP (9) (Interior Gateway Protocol)
•
IGRP (88)
•
MHRP (48) (Mobile Host Routing Protocol)
•
OSPFIGP (89) (Open Shortest Path First Interior Gateway Protocol)
•
IP ICMP (Internet Control Message Protocol) types:
•
IPv6
•
Mobile IP
•
Router Advertisement
•
Router Selection
•
IP/UDP (User Datagram Protocol) frames with the following destination protocol
port numbers:
•
BGP (179) (Border Gateway Protocol)
•
RAP (38) (Route Access Protocol)
•
RIP (520) (Routing Information Protocol)
•
IP/TCP frames with the following destination or source protocol port numbers:
•
BGP (179) (Border Gateway Protocol)
•
RAP (38) (Route Access Protocol)
Configuring the Spanning Tree
4
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