| 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 support a customer with 2 FDDI nets, one is private to teh Unix
servers, the other goes to the hub and then to all their ethernets
around the company.
On the public net I see huge numbers of multicast bytes. Here is a
piece of netstat:
fta0 FDDI counters at Mon Jun 24 13:38:22 1996
53878 seconds since last zeroed
37091537 ANSI MAC frame count
0 ANSI MAC frame error count
0 ANSI MAC frames lost count
922059962 bytes received
40987240 bytes sent
5153345 data blocks received
123732 data blocks sent
883213471 multicast bytes received
5006716 multicast blocks received
183569 multicast bytes sent
2492 multicast blocks sent
on the private- unix only net I see:
fta1 FDDI counters at Mon Jun 24 13:40:18 1996
53991 seconds since last zeroed
886979495 ANSI MAC frame count
0 ANSI MAC frame error count
0 ANSI MAC frames lost count
81861828 bytes received
998655604 bytes sent
654646 data blocks received
1557733 data blocks sent
391122 multicast bytes received
9940 multicast blocks received
11329 multicast bytes sent
229 multicast blocks sent
Is it a problem that we have such huge multicast numbers- How do we
track down what is causing it. The custoemr says 'no one is complaining'
about a net problem, so it must be OK.
| T.R | Title | User | Personal Name | Date | Lines |
|---|---|---|---|---|---|
| 2074.1 | NPSS::RAUHALA | Mon Jun 24 1996 17:01 | 6 | ||
given that bridges, by default, learn unicast addresses and then filter
them, the majority of traffic that ends up on the public net is
multicast traffic. using the numbers in .0 you have 16k bytes/second
of multicast traffic on the FDDI, nothing to get worried about.
ken
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