FDDI Cable Attachment Configurations
Dual-Homed Connection
| Backup |
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| Primary |
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| FDDI Concentrator |
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| FDDI Concentrator | |||
... |
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| ... | ... |
| ... | |
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| A | B |
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| A | B |
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M M | M M |
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| M M M | M | ||
A B
HP router with FDDI port
Figure D-3. Example of Dual-Homed Connection
This configuration:
avoids the need for an optical bypass switch (page
provides redundancy so that failure of one cable or concentrator will not break the router’s connection to the dual ring
During normal operation in the above example, traffic is sent and received over port ‘‘B’’ of the router. Port ‘‘A’’ is used only if the cable or concentrator attached to port ‘‘B’’ fails.
1.Attach port ‘‘A’’ of the to an ‘‘M’’ port of a concentrator.
2.Attach port ‘‘B’’ of the router to an ‘‘M’’ port of another router.
Cable FDDI D Attachments