1.1 PTS
Using two switches, connected in a loop, view port status, and transmits the data stream to see whether the loop is eliminated.
1.1.1 Topology
1.1.2 Configuration
1) Open the Spanning Tree model stp
xNet#configure terminal
xNet(config)#spanning-tree mode stp
xNet(config)#end
XNET #
2) The configuration of the switch into the same interfaces used by a VLAN, ge1 as trunk and ge48, ge25 access mode.
207 and 208 the same configuration:
xNet#con t
xNet(config)#vlan database
xNet(config-vlan)#vlan 2
xNet(config-vlan)#end
XNET #
xNet#con t
xNet(config)#interface ge1
xNet(config-if)#switchport
xNet(config-if)#switchport mode trunk
xNet(config-if)#switchport trunk allowed vlan add 2
xNet(config-if)#exit
xNet(config)#interface ge48
xNet(config-if)#switchport
xNet(config-if)#switchport mode trunk
xNet(config-if)#switchport trunk allowed vlan add 2
xNet(config-if)#exit
xNet(config)#interface ge25
xNet(config-if)#switchport
xNet(config-if)#switchport access vlan 2
xNet(config-if)#end
XNET #
3) View spanning tree port status:
ge1 207 and ge48 (ge1 as Forwarding, ge48 is Blocked):
208 ge1 and ge48 (ge1 to Forwarding, ge48 is Forwarding):
Seen from the show information, Root 208 is the machine
4) The machine 207 to Root, set its priority to:
207 No. machines:
xNet(config)#spanning-tree priority 0
xNet(config)#end
XNET #
View Root turned into a 207.
5) sends the packet PC-101, PC-91 No. packet receiving function.
6) on the interface to enable / disable spanning tree:
xNet#configure terminal
xNet(config)#interface ge25
xNet(config-if)#spanning-tree disable
1.1.3 results
Two switches connected in a loop, a port status change, block one of the ports, the loop has been eliminated by calculation protocol.