Published 6月 07, 2018 by with 0 comment

CCNP-BCMSN-v5.0 Lab 3-1: Spanning Tree Protocol (STP) Default Behavior


!!!I used real Cisco 3550 switch *4 to do this lab. I did not use Dynamips to do this lab.!!!

Objective:
The purpose of this lab is to observe the default behavior of STP.

Scenario:
In this lab, you will observe what spanning tree does and why.


Basic Configuration:
DLS1 & DLS2:
enable
configure terminal
!
no ip domain lookup
!
vtp mode transparent
!
line console 0
 logging synchronous
 exec-timeout 0 0
!
interface range FastEthernet 0/1 -24
 shutdown
 exit
!
interface range gigabitEthernet 0/1 - 2
 shutdown
 exit
!
hostname DSL(1,2)

ALS1 & ALS2:
enable
configure terminal
!
no ip domain lookup
!
vtp mode transparent
!
line console 0
 logging synchronous
 exec-timeout 0 0
!
interface range FastEthernet 0/1 -24
 shutdown
 exit
!
interface range gigabitEthernet 0/1 - 2
 shutdown
 exit
!
no ip routing
!
hostname ASL(1,2)


Step 1
Start by deleting the vlan.dat file, erasing the startup config, and reloading all your switches.
All Switch:
Clearing all Switches


Step 2
By default, spanning tree runs on every port. When a new link becomes active, the
port goes through the listening, learning, and forwarding states before it becomes
active.
DLS1:
DSL1(config)#interface range FastEthernet 0/7 -12
DSL1(config-if-range)#no shutdown

DLS2:
DSL2(config)#interface range FastEthernet 0/7 -12
DSL2(config-if-range)#no shutdown

ALS1:
ASL1(config)#interface range FastEthernet 0/7 -12
ASL1(config-if-range)#no shutdown

ALS2:
ASL2(config)#interface range FastEthernet 0/7 -12
ASL2(config-if-range)#no shutdown


Step 3
Verify STP with the show spanning-tree command.
All Switch:
All Switch#show spanning-tree

DSL1#show spanning-tree

VLAN0001
  Spanning tree enabled protocol ieee
  Root ID    Priority    32769
             Address     000e.d7a6.9c80
             This bridge is the root
             Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority    32769  (priority 32768 sys-id-ext 1)
             Address     000e.d7a6.9c80
             Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec
             Aging Time 300

Interface           Role Sts Cost      Prio.Nbr Type
------------------- ---- --- --------- -------- --------------------------------
Fa0/7               Desg FWD 19        128.7    P2p
Fa0/8               Desg FWD 19        128.8    P2p
Fa0/9               Desg FWD 19        128.9    P2p
Fa0/10              Desg FWD 19        128.10   P2p
Fa0/11              Desg FWD 19        128.11   P2p
Fa0/12              Desg FWD 19        128.12   P2p

DSL1#

DSL2#show spanning-tree

VLAN0001
  Spanning tree enabled protocol ieee
  Root ID    Priority    32769
             Address     000e.d7a6.9c80
             Cost        19
             Port        11 (FastEthernet0/11)
             Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority    32769  (priority 32768 sys-id-ext 1)
             Address     000e.d7a6.ab00
             Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec
             Aging Time 300

Interface           Role Sts Cost      Prio.Nbr Type
------------------- ---- --- --------- -------- --------------------------------
Fa0/7               Desg FWD 19        128.7    P2p
Fa0/8               Desg FWD 19        128.8    P2p
Fa0/9               Desg FWD 19        128.9    P2p
Fa0/10              Desg FWD 19        128.10   P2p
Fa0/11              Root FWD 19        128.11   P2p
Fa0/12              Altn BLK 19        128.12   P2p

DSL2#

ASL1#show spanning-tree

VLAN0001
  Spanning tree enabled protocol ieee
  Root ID    Priority    32769
             Address     000e.d7a6.9c80
             Cost        19
             Port        7 (FastEthernet0/7)
             Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority    32769  (priority 32768 sys-id-ext 1)
             Address     000e.d7a6.c500
             Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec
             Aging Time 300

Interface           Role Sts Cost      Prio.Nbr Type
------------------- ---- --- --------- -------- --------------------------------
Fa0/7               Root FWD 19        128.7    P2p
Fa0/8               Altn BLK 19        128.8    P2p
Fa0/9               Altn BLK 19        128.9    P2p
Fa0/10              Altn BLK 19        128.10   P2p
Fa0/11              Desg FWD 19        128.11   P2p
Fa0/12              Desg FWD 19        128.12   P2p

ASL1#

ASL2#show spanning-tree

VLAN0001
  Spanning tree enabled protocol ieee
  Root ID    Priority    32769
             Address     000e.d7a6.9c80
             Cost        19
             Port        9 (FastEthernet0/9)
             Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority    32769  (priority 32768 sys-id-ext 1)
             Address     000e.d7d4.7500
             Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec
             Aging Time 300

Interface           Role Sts Cost      Prio.Nbr Type
------------------- ---- --- --------- -------- --------------------------------
Fa0/7               Altn BLK 19        128.7    P2p
Fa0/8               Altn BLK 19        128.8    P2p
Fa0/9               Root FWD 19        128.9    P2p
Fa0/10              Altn BLK 19        128.10   P2p
Fa0/11              Altn BLK 19        128.11   P2p
Fa0/12              Altn BLK 19        128.12   P2p

ASL2#


Reference:
Cisco Networking Academy
http://www.cisco.com/web/learning/netacad/index.html

CCNP Version 5.0: Building Multilayer Switched Networks
Student Lab Manual


最初發表 / 最後更新: 2008.10.05 / 2018.06.0.7

0 comments:

張貼留言