Both CONFIG and TCN BPDUs are used only in STP compatibility mode. In RSTP mode, the BPDUs sent in both directions are RSTP BPDUs. So they can be sent on the root port.
For a description of how topology changes are handled, see the section titled "New Topology Change Mechanisms" in http://www.cisco.com/en/US/tech/tk389/tk621/technologies_white_paper09186a0080094cfa.shtml Is this causing any particular issue? On Tue, Oct 5, 2010 at 3:24 PM, Rodolfo Giometti <[email protected]> wrote: > Hello, > > in function STP_transmit_check_conditions (rstplib/transmit.c) the > case: > > case IDLE: > if (!port->helloWhen) return STP_hop_2_state (this, > TRANSMIT_PERIODIC); > if (!port->sendRSTP && port->newInfo && > (port->txCount < TxHoldCount) && > (port->role == DesignatedPort) && > port->helloWhen) > return STP_hop_2_state (this, TRANSMIT_CONFIG); > if (!port->sendRSTP && port->newInfo && > (port->txCount < TxHoldCount) && > (port->role == RootPort) && > port->helloWhen) > return STP_hop_2_state (this, TRANSMIT_TCN); > if (port->sendRSTP && port->newInfo && > (port->txCount < TxHoldCount) && > ((port->role == RootPort) || <---- > (port->role == DesignatedPort))) > return STP_hop_2_state (this, TRANSMIT_RSTP); > break; > > states that a RSTP bpdu can be transmitted even throught a RootPort > which, IMHO, is not correct... only topology change BPDU should be > sent over the RootPort. That's why I suggest to remove the line with > the arrow (<----). > > Comments? :) > > Ciao, > > Rodolfo > > -- > > GNU/Linux Solutions e-mail: [email protected] > Linux Device Driver [email protected] > Embedded Systems phone: +39 349 2432127 > UNIX programming skype: rodolfo.giometti > Freelance ICT Italia - Consulente ICT Italia - www.consulenti-ict.it > _______________________________________________ > Bridge mailing list > [email protected] > https://lists.linux-foundation.org/mailman/listinfo/bridge > _______________________________________________ Bridge mailing list [email protected] https://lists.linux-foundation.org/mailman/listinfo/bridge
