If you have interconnected two Catalyst 3750 switches, I do not see how one of them can run only RSTP and the other Rapid-PVST. On Cisco switches, there is only PVST or Rapid-PVST - Catalysts have no option of running a global RSTP for all VLANs.
You are probably running PVST+ and RVPST+ but that is semantics. Is there a reason why you can't run RPVST+ on both?
The fast convergence of RPVST+ is based on synchronizing the topology. That does not work when mixing versions. The RPVST+ switch should detect that the other switch is running PVST+ by the incoming BPDUs. It would then revert to sending 802.1D BPDUs on that interface and rely on timers instead of synchronization.
[toc:faq]The ProblemOn traditional switches whenever we have a trunk
interface we use the VLAN tag to demultiplex the VLANs. The switch needs
to determine which MAC Address table to look in for a forwarding
decision. To do this we require the switch to do...
[toc:faq]Introduction:Netdr is a tool available on a RSP720, Sup720 or
Sup32 that allows one to capture packets on the RP or SP inband. The
netdr command can be used to capture both Tx and Rx packets in the
software switching path. This is not a substitut...
IntroductionOSPF, being a link-state protocol, allows for every router
in the network to know of every link and OSPF speaker in the entire
network. From this picture each router independently runs the Shortest
Path First (SPF) algorithm to determine the b...