| T.R | Title | User | Personal
Name | Date | Lines |
|---|
| 3173.1 | Managed as a single entity? | SNOFS1::KHOOJEANNIE | Humpty Dumpty was pushed | Thu Jan 18 1996 04:10 | 14 |
| They could mean that they want the stack to only count as 1 repeater
hop in the Ethernet (IEEE 802.3 Transmission Model 1) rules. In this case,
the MultiStack would count as 2 hops, i.e. to get from an FS port to a T-16
port, you go from the FS to the thinwire (1 hop) and then from the thinwire
to the T-16 (another hop).
(I'm not sure how the MultiStack rates against Transmission Model 2 ???)
But I would take it to mean that they want to manage the stack
as a single logical unit, and in that case, we comply, as the 90FS
proxy manages the T-16 and it all looks like one domain in HUBwatch.
Jeannie
|
| 3173.2 | What is Transmission Model 2 ? | TLAV02::WITTAYAJ | | Thu Jan 25 1996 00:31 | 8 |
| Thanks a lot,
What do you mean about Transmission Model 2 ?
Is it 1 repeater hop such as two DECrepeater900TMs in the same
Flexible (IMB) channel in HUB900 can do 1 repeater delay time ( I mean
propagation time ) ?
Bye
Tony.
|
| 3173.3 | Model 2 ... | SNOFS1::KHOOJEANNIE | Humpty Dumpty was pushed | Thu Jan 25 1996 03:55 | 16 |
| Hi Tony
Model 1 and 2 are two different methods for verifying the operation of
802.3 networks.
Model 1 provides configuration rules in terms of repeater hops
(the primary rule is that there shall be no more than 4 repeaters
and 5 segments between any two nodes), whereas Model 2 tends to be
used for more complex Ethernet configurations - it deals with
maintaining an acceptable round trip signal propagation delay and
interframe gap shrinkage (for which you have to calculate end-to-end values
for path delay and segment variability over the entire network path).
All the best
Jeannie
|
| 3173.4 | First paragraph of .1 was correct | NETCAD::HERTZBERG | History: Love it or Leave it! | Thu Jan 25 1996 13:08 | 7 |
| >> Is it 1 repeater hop such as two DECrepeater900TMs in the same
>> Flexible (IMB) channel in HUB900 ...
No, it is not. The multistack products cannot make two physical
repeaters act as one logical repeater. It always takes a hop to get
from any front panel port to the thinwire backbone, so there are two
hops between front panel ports in different modules in the stack.
|