Could you explain?
Peter van Oene em 14/11/2002 10:28:04 Para: "[EMAIL PROTECTED]" cc: [EMAIL PROTECTED] Assunto: Re: Strange Spanning-Tree Behavior [7:57449] Only one side of a given link will block and thus what you are seeing is normal behavior. On Thu, 2002-11-14 at 11:00, [EMAIL PROTECTED] wrote: > 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=57454&t=57449 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
