Information Technology Reference
In-Depth Information
Caution
In certain situations, replacing existing translational bridges with Cisco translational
bridges can cause interoperability problems. Some translational bridge implementations
map functional addresses between media (such as local-area transport [LAT] functional
address 0900.2B00.00FA on Ethernet) to a broadcast address on the Token Ring side (such
as C000.FFFF.FFFF). Cisco does not support this functionality. Furthermore, you cannot
use translational bridging with any protocol that embeds the MAC address of a station
inside the Information field of the MAC frames (examples include IP ARP and Novell
IPX).
Table 10-7 outlines the problems that might cause this symptom and describes solutions to those
problems.
Table10-6
Translational Bridging: Client Cannot Connect to Server
Possible Problem
Solution
Media problem
Verify the line using the
show interfaces
exec command. If the
interface or line protocol is down, troubleshoot the media. For
LAN media, refer to the chapter that covers your media type.
Ethernet-to-Toke
n Ring address
mapping that is
misconfigured
1.
Use the
show bridge
exec command to verify the existence
of the Ethernet station.
Ethernet and Token Ring addresses use opposite bit ordering
schemes. The Token Ring address 0110.2222.3333 is equivalent
to the Ethernet address 8008.4444.cccc.
2.
Use the
show spanning
exec command to determine
whether the Ethernet port is in forwarding mode.
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