if a mac classification is done for a mac address. The host with that
mac address cannot be part of anyother vlans?
 p1 m1{v1,v2}               p2  p3,v1         p4,v1
a ---------------------------- b ------------------------c

I am working with PAUSE frames and I have some problems :
I'm working in a Project with Pause Frames and I have a problem .My really
problem is that  I send PAUSE frames with a FPGA to the PC and I´m sure
the PC receive   PAUSE frames I have sent because Ethereal and Wireshark

What tools should I use and where to get them?

Is there an MSTP MIB?  I've looked all over and the best I can find is
some mailing list activity in 2005 that says one is needed but nothing
current or seemingly approved.

I have an issue where a 10 Mbps system (non auto-negotiation) links
with another port on 100 Mbps port which is also non negotiatited/
forced. Is this happening due to aliasing ?
The 100 Mbps port does not link with the 10 Mbps port in this

Could someone check my calculations? I'm looking for the shortest time
an Ethernet frame will occupy the wire. I make it about 5uS on 100Mbit
as follows.
Minimum frame size in bytes is 46 payload + 14 header + 4 FCS = 64.

I have a problem with Sharing documents, and printers in a LAN (all
comps Win XP home) network I am responsible for. It is a nice 32-port
1GBit switch, used by about 5-10 (sometimes more) computers at once.
There was a long time it worked with no Internet (Sharing worked -

I currently have a LAN consisitng of a dell PC 6024 doing intervlan
routing for a number of vlans directly on it and on it via other
switches. Now, i'm changing the architecture such that my new fw/
router (which supports multiple security zones and vlanning) is going

i've read an understood basics of vlan; I've a very basic doubt on
this.
can i view vlan as a logical interface, because i've seen some
switches which provide

I have a design with a tri-speed Base-T PHY, which exhibits some weird
behaviour. For some reason sometimes the PHY doesn't establish the link with
another PHY (typically in a PC) after the auto-negotiation. Some of my
boards almost never fail, while others fail much more ...

Note: I also posted this to c.a.embedded. I'm not sure it belongs
here, but no answers there so far...
In putting together a little control nodule w/ a single 10/100
ethernet port, I started wondering if I need to pay any attention to

Dear everyone,
apologies for a question that's more hardware-related than networking
related...
I have a D-Link DGS-1216T Ethernet switch, in a 19"/1U chassis - and

Hello! I'm looking for a replacement for our "3com Baseline Switch 2250 plus" 48p switch. This is
the second 3com 2250+ we have had (the last one was returned) and it is very unstable and crappy.
We don't need any fansy, we are about 150 users and the 48p switch (current 3com ...