| 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 |
I've read and re-read the section describing the DECbridge 5xx/6xx in the "NaC Buyer's Guide Supplement", but still have this question: will the DECbridge 6xx perform packet filtering between the three Ethernet ports? That is, if two nodes connected to the same Ethernet port communicate in a non-broadcast fashion, that traffic will not be forwarded by the bridge to the FDDI port; will it also not be forward to the other two Ethernet ports? Thanks! tl
| T.R | Title | User | Personal Name | Date | Lines |
|---|---|---|---|---|---|
| 517.1 | KONING::KONING | Paul Koning, NI1D | Thu Mar 26 1992 13:20 | 16 | |
The rule for bridges is: things are only forwarded if they need to be and only
on the port(s) that need it. Our multiport bridges do just that.
There are basically three possible dispositions for a packet arriving at
a bridge (apart from learning, which is logically independent of forwarding):
1. Bridge ignores it -- if the destination is on the port where the packet
arrived.
2. Forward on all ports that are on the spanning tree ("flooding") -- if the
destination is multicast, or the location of the destination is unknown.
3. Forward on a single specific port -- if the destination is on that port,
a different port than where the packet came in.
paul
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| 517.2 | FILTERS | LEVERS::S_JACOBS | Live Free and Prosper | Fri Mar 27 1992 10:45 | 4 |
To answer more simply.......YES. Traffic between ethernet ports is
bridged, not repeated.
Steve
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