If an Ethernet frame generated on LAN 1 is destined for LAN 2, the frame is
translated as shown in figure 8.
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.
LAN 1
FDDI Ring
LAN 2
LAN 1 Frame
Translated
Frame
LAN 2 Frame
DA SA
type
data
FCS
DA SA
type
data
FCS
DA SA
AA AA 03
SNAPLLC
OUI
OO OO OO
type
data
FCS
A
p
p
li
c
a
ti
o
n
N
o
te
s
/
C
a
s
e
S
tu
d
ie
s
3
Shining a Light on FDDI
Internetworking with HP Routers
3-55
Содержание 600 Series
Страница 1: ...Hewlett Packard Series 200 400 and 600 Routers HP Routing Services and Applications ...
Страница 4: ......
Страница 5: ...1 Product Notes ...
Страница 6: ...Features of HP Routers Architecture and Technology Branch Office Routing Product Notes 1 2 ...
Страница 38: ...Architecture and Technology Software Control Path Architecture 1 34 ...
Страница 52: ...Branch Office Routing Future Directions 1 48 ...
Страница 53: ...2 Routing Services Notes ...
Страница 106: ...Bridging Service Traffic Prioritization 2 54 ...
Страница 158: ...Novell IPX Routing Service NetBIOS Protocol Support 2 106 ...
Страница 194: ...Data Compression for WAN Links Conclusion 2 142 ...
Страница 195: ...3 Application Notes and Case Studies ...
Страница 224: ...Improving Network Availability Application Recovery 3 30 ...
Страница 234: ...ISDN Wide Area Network Design Dry Creek Joint Elem School District Performance 3 40 ...
Страница 316: ......