HP 200 Series Services And Applications page 249

If an Ethernet frame generated on LAN 1 is destined for LAN 2, the frame is
translated as shown in figure 8.
LAN 1
LAN 1 Frame
SNAPLLC
Translated
DA SA
Frame
AA AA 03
LAN 2 Frame
Figure 8. Translation Bridging
Translation by the bridge consists of:
1. extraction of addressing information from the Ethernet header
2. incorporation of address information into a newly generated FDDI
MAC header
3. encapsulation of Ethernet data as specified in RFC 1088
4. FCS recalculation
5. addition of the FDDI MAC-level trailer
Standalone FDDI Rings
Network designers can take advantage of FDDI's high-speed capabilities
without an FDDI backbone in a network topology. In the absence of a ring, a
network designer can use the HP 27290A Router BR as a standalone FDDI
network, interconnecting a maximum of two SAS devices or a single DAS.
Shining a Light on FDDI
Internetworking with HP Routers
LAN 2
FDDI Ring
DA SA type data
OUI
type data
OO OO OO
DA SA type data
FCS
FCS
FCS
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