| Title: | FDDI - The Next Generation |
| Moderator: | NETCAD::STEFANI |
| Created: | Thu Apr 27 1989 |
| Last Modified: | Thu Jun 05 1997 |
| Last Successful Update: | Fri Jun 06 1997 |
| Number of topics: | 2259 |
| Total number of notes: | 8590 |
We are planning on using Gigaswiches in the following configuration: _____A|Router|B___A|Router|B___________________________ | | | Dual Ring | | | |____A|GigaSwitch1|B_________________A|Gigaswitch2|B____| ||...| ||...| | Dual Rings | | | |_A|Bridge|B_A|Bridge|B_A|Bridge|B_| | | | | | | -------- -------- --------- Ethernet Lans In this configuration the routers, Gigaswitches and Ethernet/FDDI bridges are all DAS connections. Gigiaswitch1 will be set up as the root bridge. Several Bridges rings will be connected to the Gigaswitches as shown above. Is the following true?: 1. The customer feels that the Ethernet/FDDI bridges DO NOT require spanning tree for this configuration to work. 2. I assume that in this configuration Gigaswitch2 will detect a loop and disable the port that connects the Bridge ring. The Bridge ring will then wrap at the last bridges B port. 3. If Gigaswitch1 then fails, spanning tree will be recalculated and Gigaswitch2 will enable the port that connects the Bridge ring and the ring will then wrap at the A port of the bridge connected to Gigaswitch1.
| T.R | Title | User | Personal Name | Date | Lines |
|---|---|---|---|---|---|
| 1294.1 | Flip the A-B ports... | CGOOA::CRICK | Sun Mar 27 1994 23:35 | 2 | |
The A-B ports on the Routers should be reversed in my diagram.
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| 1294.2 | KONING::KONING | Paul Koning, B-16504 | Mon Mar 28 1994 15:07 | 8 | |
1. If you have a loop, you need spanning tree. 2. In this case, one of the ports ends up in backup state, but that does NOT wrap the ring. All that happens is that the port is not used for bridging. Why the prejudice against spanning tree? paul | |||||