Automatically control downlinks according to uplink's state

[TaoLeiCCIE_2]

Hello.

A switch has one uplink and several downlinks.

Is there any mechanism to accomplish this demand:

  When uplink gets down, all downlinks get down automatically.

  When uplink recovers then all downlinks recover, too.

Thanks.

[andrew.prince]

I am afraid I will disagree with you 1 last time.  STP has a possible slow convergance time agreed - but never the documented 50 seconds.  RSTP has documented failover times of 5/6 seconds - I can tell you right here and now I have "never" seen anything higher that 3/5ms failover on a properly designed and properly configured RSTP topology.  I have even witnessed PVST+ place a blocking port into forwarding in under 10ms.

Thanks.

[TaoLeiCCIE_2]

OK, if time permits, we'll have a try on RSTP.

Thank you very much.