This is a discussion on Insight into ethernet switch design and bugs - Network ; I've been seeing some flaky performance in inexpensive switches. I'm seeing connectivity interrupted for tens of minutes at a time or perhaps until a reboot of the switch or perhaps until port use is changed. In one case, the switch ...
I've been seeing some flaky performance in inexpensive switches. I'm seeing
connectivity interrupted for tens of minutes at a time or perhaps until a
reboot of the switch or perhaps until port use is changed.
In one case, the switch is being used as a convenient place to plug into the
downstream feed from a server. Otherwise, the switch is being used with one
port in and one port out - carrying all the server's traffic.
At one port ("upstream") there is but a single destination. On the other
port ("downstream"), all clients on the network appear.
Now, I have a rudimentary understanding of switches. So, I can imagine that
this configuration will cause the switch to store something like a table
that associates a long list of MAC addresses or IP addresses with a single
port. Either that or the switch "forgets" older associations as new traffic
appears from a variety of clients - and is continually updating its
associations on the downstream port. Or, maybe the switch reverts to being
a hub and "acts dumb". I have no idea.
I'm going to assume that the switch keeps a list. If this is the case then
there must be a finite limit on the size of the list. One can imagine a
LIFO stack of MAC associations with finite stack depth. One can imagine a
bug in LIFO management. etc. etc.
Might it be possible for a switch to get confused and stop all
communications and then take a noticeable amount of time to "wake up" or
simply fail altogether? Well, theoretically anything is possible. But
might this be a practical issue that is somewhat common / known in the
Does anyone have experience with this sort of thing?
Any brand / model / bug correlation? It appears something like this could
be happening with a Belkin 8-port switch supporting 12 clients and a router
as described above.