Does anybody know what is this? On interface fa0/24 of SW2, the state of spannnig-tree for Vlan1 was forwarding and for Vlan11 was blocking . All the values, bridge priority - port priority - port cost, were the default values. I expected both Vlans as blocking.
The network is: SW1(fa0/22) -------(fa0/22) SW2(fa0/24)-------(fa0/24) SW3 (fa0/23)|__________________________________________|(fa0/24) After almost get crazy, I figured out that maybe the switch was crazy, so I erased the configuration, reload the switch and typed the configuration back. And it works fine. Before that, I just reload the switches, and there was no changes. SW2#sh spann int fa 0/24 Interface Fa0/24 (port 38) in Spanning tree 1 is FORWARDING Port path cost 19, Port priority 128 Designated root has priority 32768, address 0002.fd34.9180 Designated bridge has priority 32768, address 0005.326d.65c0 Designated port is 38, path cost 19 Timers: message age 0, forward delay 0, hold 0 BPDU: sent 31481, received 604975 SW3#sh spann int fa 0/24 Interface Fa0/24 (port 38) in Spanning tree 1 is BLOCKING Port path cost 19, Port priority 128 Designated root has priority 32768, address 0002.fd34.9180 Designated bridge has priority 32768, address 0005.326d.65c0 Designated port is 38, path cost 19 Timers: message age 2, forward delay 0, hold 0 BPDU: sent 605190, received 32565 SW 1 host SW1 ! interface FastEthernet0/1 duplex half speed 10 switchport access vlan 11 ! interface FastEthernet0/2 duplex half speed 10 ! interface FastEthernet0/3 duplex half speed 10 ! interface FastEthernet0/4 duplex half speed 10 ! interface FastEthernet0/5 duplex half speed 100 ! interface FastEthernet0/22 description *** connection to SW2 *** switchport mode trunk ! interface FastEthernet0/23 description *** connection to SW3 *** switchport mode trunk ! Int vlan 1 ip ad 1.1.1.254 255.255.255.0 SW 2 host SW2 ! interface FastEthernet0/22 description *** connection to SW1 *** switchport mode trunk ! interface FastEthernet0/24 description *** connection to SW3 *** switchport mode trunk ! Int vlan 1 ip ad 2.2.2.254 255.255.255.0 SW 3 host SW3 ! interface FastEthernet0/23 description *** connection to SW1 *** switchport mode trunk ! interface FastEthernet0/24 description *** connection to SW2 *** switchport mode trunk ! Int vlan 1 ip ad 3.3.3.254 255.255.255.0 Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=57449&t=57449 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]