> Definitely not more than 20 in a ring. As far as I know, IOS limits > the value of max-hops to 20. This means you can't have a BPDU > traverse more than 20 hops without being thrown away. If one pair of > switches in the ring experienced a total cut, your network would have > a diameter of 20, end to end.
this is STP limitation: MaxAge is by default 20 hops. for IOS, you can change this value: Switch(config)#spanning-tree vlan 1 max-age ? <6-40> maximum number of seconds the information in a BPDU is valid or for MST Switch(config)#spanning-tree mst max-age ? <6-40> maximum number of seconds the information in a BPDU is valid value 40 is maximum bpdu hopcount for 3560 switch, for other models there can be other upper limit. -- wbr sergey khalavchuk _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
