if I just connect two similar port say both 10 gb of one switch to another symmetric bridge with stp enabled on both bridge , stpstate of all four ports always remain forwarding. ( may be because all four of them are either root or desginated port in above setup) should I except that one port atleast will get into blocking state , if i connect two non-similar ports together say a 10gb port on one switch to FE port on another switch as now path-cost to root will differ. ( as path-cost depending on link speed )=A0 Best Regards, Ashish Anand -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.linux-foundation.org/pipermail/bridge/attachments/20050420/89c52585/attachment-0002.htm
Stephen Hemminger
2007-Apr-18 17:22 UTC
[Bridge] stp port state always remains forwarding ...
On 20 Apr 2005 08:09:23 -0000 "ashish anand" <ashish_ibm@rediffmail.com> wrote:> if I just connect two similar port say both 10 gb of one switch to another symmetric bridge with stp enabled on both bridge , stpstate of all four ports always remain forwarding.Is STP enabled? It is off by default now.> ( may be because all four of them are either root or desginated port in above setup) > > should I except that one port atleast will get into blocking state , if i connect two non-similar ports together say a 10gb port on one switch to FE port on another switch as now path-cost to root will differ. ( as path-cost depending on link speed )? >If STP is working, it should see the loop and take one port out of forwarding.> Best Regards, > Ashish Anand