Innovative Technologies

• Configure all inter-switch links on SW2, SW3, and SW4 to be in dynamic
auto state.
• Configure all inter-switch links on SW1 to be in dynamic desirable state.
• Configure SW2 as a VTP server in the domain VTP.
• Configure SW1, SW3, and SW4 as VTP clients in the domain VTP.

SW1:
vtp domain VTP
vtp mode client
!
interface range FastEthernet0/13 - 21
switchport mode dynamic desirable
!
interface FastEthernet0/1
switchport access vlan 146
!
interface FastEthernet0/5
switchport access vlan 58

SW2
vtp domain VTP
vlan 5,7,8,9,10,22,43,58,67,79,146
!
interface FastEthernet0/2
switchport access vlan 22
!
interface FastEthernet0/4
switchport access vlan 43
!
interface FastEthernet0/6
switchport trunk encapsulation dot1q
switchport mode trunk
!

• Configure the link between SW2 and R6 as an 802.1q trunk link.
• Using the subinterfaces listed in the diagram configure R6 to route traffic for both VLANs 67 and 146 on its Ethernet link.

SW2(config)#int Fa 0/6
SW2(config-if)#switchport trunk encapsulation dot1q 
SW2(config-if)#switchport mode  trunk 
SW2(config-if)#end

R6(config)#int Fa 1/0.67
R6(config-subif)#encapsulation dot1Q 67
R6(config-subif)#ip address 155.1.67.6 255.255.255.0
R6(config-subif)#exit
R6(config)#int Fa 1/0.146                     
R6(config-subif)#encapsulation dot1Q 146            
R6(config-subif)#ip address 155.1.146.6 255.255.255.0
R6(config-subif)#exit
R6(config)#end

• Verify that R6 has reachability to devices both on VLAN 67 and 146.

SW2#sh int fa0/6 trunk
Port        Mode         Encapsulation  Status        Native vlan
Fa0/6       on           802.1q         trunking      1
Port        Vlans allowed on trunk
Fa0/6       1-4094
Port        Vlans allowed and active in management domain
Fa0/6       1,5,7-10,22,43,58,67,69,79,146
Port        Vlans in spanning tree forwarding state and not pruned
Fa0/6       1,5,7-10,22,43,58,67,69,79,146

R6#ping 155.1.67.7
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 155.1.67.7, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/4 ms
R6#ping 155.1.146.4
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 155.1.146.4, timeout is 2 seconds:
.!!!!
Success rate is 80 percent (4/5), round-trip min/avg/max = 1/1/1 ms

Disable Dynamic Trunking Protocol on the trunk links of SW1.

                                                         
                                                         
SW1(config)#int range Fa0/13 - 21                        
SW1(config-if-range)#switchport trunk encapsulation dot1q
SW1(config-if-range)#switchport mode trunk               
SW1(config-if-range)#switchport nonegotiate              
SW1(config-if-range)#end                                 
                                                         
SW2(config)#int range Fa0/13 - 21                        
SW2(config-if-range)#switchport trunk encapsulation dot1q
SW2(config-if-range)#switchport mode trunk               
SW2(config-if-range)#switchport nonegotiate              
SW2(config-if-range)#end                                 
                                                         
SW3(config)#int range Fa0/13 - 21                        
SW3(config-if-range)#switchport trunk encapsulation dot1q
SW3(config-if-range)#switchport mode trunk               
SW3(config-if-range)#switchport nonegotiate              
SW3(config-if-range)#end                                 
                                                         
SW4(config)#int range Fa0/13 - 21                        
SW4(config-if-range)#switchport trunk encapsulation dot1q
SW4(config-if-range)#switchport mode trunk               
SW4(config-if-range)#switchport nonegotiate              
SW4(config-if-range)#end                                 

Verify that trunking is still occurring between SW1 & SW2, SW1 & SW3, and SW1 & SW4 without the use of DTP.

SW1#sh int trunk

Port        Mode         Encapsulation  Status        Native vlan
Fa0/13      on           802.1q         trunking      146
Fa0/14      on           802.1q         trunking      146
Fa0/15      on           802.1q         trunking      146
Fa0/16      on           802.1q         trunking      146
Fa0/17      on           802.1q         trunking      146
Fa0/18      on           802.1q         trunking      146
Fa0/19      on           802.1q         trunking      146
Fa0/20      on           802.1q         trunking      146
Fa0/21      on           802.1q         trunking      146

SW2#sh int trunk
Port        Mode         Encapsulation  Status        Native vlan
Fa0/6       on           802.1q         trunking      1
Fa0/13      on           802.1q         trunking      146
Fa0/14      on           802.1q         trunking      146
Fa0/15      on           802.1q         trunking      146
Fa0/16      on           802.1q         trunking      146
Fa0/17      on           802.1q         trunking      146
Fa0/18      on           802.1q         trunking      146
Fa0/19      on           802.1q         trunking      146
Fa0/20      on           802.1q         trunking      146
Fa0/21      on           802.1q         trunking      146

SW3#sh int trunk
Port        Mode         Encapsulation  Status        Native vlan
Fa0/13      on           802.1q         trunking      146
Fa0/14      on           802.1q         trunking      146
Fa0/15      on           802.1q         trunking      146
Fa0/16      on           802.1q         trunking      146
Fa0/17      on           802.1q         trunking      146
Fa0/18      on           802.1q         trunking      146
Fa0/19      on           802.1q         trunking      146
Fa0/20      on           802.1q         trunking      146
Fa0/21      on           802.1q         trunking      146

SW4#sh int trunk
Port        Mode         Encapsulation  Status        Native vlan
Fa0/13      on           802.1q         trunking      146
Fa0/14      on           802.1q         trunking      146
Fa0/15      on           802.1q         trunking      146
Fa0/16      on           802.1q         trunking      146
Fa0/17      on           802.1q         trunking      146
Fa0/18      on           802.1q         trunking      146
Fa0/19      on           802.1q         trunking      146
Fa0/20      on           802.1q         trunking      146
Fa0/21      on           802.1q         trunking      146

Modify the native VLAN on the 802.1q trunks of SW1 so that traffic between devices in VLAN 146 is not tagged when sent over the trunk links.

SW1(config)#int range Fa0/13 - 21
SW1(config-if-range)#switchport trunk native vlan 146
SW2(config)#int range Fa0/13 - 21
SW2(config-if-range)#switchport trunk native vlan 146
SW3(config)#int range Fa0/13 - 21
SW3(config-if-range)#switchport trunk native vlan 146
SW4(config)#int range Fa0/13 - 21
SW4(config-if-range)#switchport trunk native vlan 146

Verification:

SW1#sh int trunk
Port        Mode         Encapsulation  Status        Native vlan
Fa0/13      desirable    802.1q         trunking      146
Fa0/14      desirable    802.1q         trunking      146
Fa0/15      desirable    802.1q         trunking      146
Fa0/16      desirable    802.1q         trunking      146
Fa0/17      desirable    802.1q         trunking      146
Fa0/18      desirable    802.1q         trunking      146
Fa0/19      desirable    802.1q         trunking      146
Fa0/20      desirable    802.1q         trunking      146
Fa0/21      desirable    802.1q         trunking      146

SW2#sh int trunk
Port        Mode         Encapsulation  Status        Native vlan
Fa0/6       on           802.1q         trunking      1
Fa0/13      auto         n-802.1q       trunking      146
Fa0/14      auto         n-802.1q       trunking      146
Fa0/15      auto         n-802.1q       trunking      146

SW3#sh int trunk
Port        Mode         Encapsulation  Status        Native vlan
Fa0/13      auto         n-802.1q       trunking      146
Fa0/14      auto         n-802.1q       trunking      146
Fa0/15      auto         n-802.1q       trunking      146

SW4#sh int trunk
Port        Mode         Encapsulation  Status        Native vlan
Fa0/13      auto         n-802.1q       trunking      146
Fa0/14      auto         n-802.1q       trunking      146
Fa0/15      auto         n-802.1q       trunking      146

Change the trunking encapsulation on SW1’s inter-switch links from static ISL to static 802.1q.

SW1(config)#int range Fa0/13 - 21
SW1(config-if-range)#switchport trunk encapsulation dot1q 

Verify that SW2, SW3, & SW4 are negotiating 802.1q as the trunking encapsulation to SW1, and that SW1 is not negotiating 802.1q to SW2, SW3, and SW4

SW1#sh int trunk
Port        Mode         Encapsulation  Status        Native vlan
Fa0/13      desirable    802.1q         trunking      1
Fa0/14      desirable    802.1q         trunking      1
Fa0/15      desirable    802.1q         trunking      1
Fa0/16      desirable    802.1q         trunking      1
Fa0/17      desirable    802.1q         trunking      1
Fa0/18      desirable    802.1q         trunking      1
Fa0/19      desirable    802.1q         trunking      1
Fa0/20      desirable    802.1q         trunking      1
Fa0/21      desirable    802.1q         trunking      1

SW2#sh int trunk
Port        Mode         Encapsulation  Status        Native vlan
Fa0/6       on           802.1q         trunking      1
Fa0/13      auto         n-802.1q       trunking      1
Fa0/14      auto         n-802.1q       trunking      1
Fa0/15      auto         n-802.1q       trunking      1

SW3#sh int trunk
Port        Mode         Encapsulation  Status        Native vlan
Fa0/13      auto         n-802.1q       trunking      1
Fa0/14      auto         n-802.1q       trunking      1
Fa0/15      auto         n-802.1q       trunking      1

SW4#sh int trunk
Port        Mode         Encapsulation  Status        Native vlan
Fa0/13      auto         n-802.1q       trunking      1
Fa0/14      auto         n-802.1q       trunking      1
Fa0/15      auto         n-802.1q       trunking      1

Statically set the trunking encapsulation of SW1’s inter-switch links to ISL.

SW1(config)#int ra fa 0/13 - 21
SW1(config-if-range)#switchport trunk encapsulation isl 

Verify that SW2, SW3, & SW4 are negotiating ISL as the trunking encapsulation to SW1, and that SW1 is not negotiating ISL to SW2, SW3,and SW4.

SW1#sh int trunk 
Port        Mode         Encapsulation  Status        Native vlan
Fa0/13      desirable    isl            trunking      1
Fa0/14      desirable    isl            trunking      1
Fa0/15      desirable    isl            trunking      1
Fa0/16      desirable    isl            trunking      1
Fa0/17      desirable    isl            trunking      1
Fa0/18      desirable    isl            trunking      1
Fa0/19      desirable    isl            trunking      1
Fa0/20      desirable    isl            trunking      1
Fa0/21      desirable    isl            trunking      1

SW2#sh int trunk
Port        Mode         Encapsulation  Status        Native vlan
Fa0/6       on           802.1q         trunking      1
Fa0/13      auto         n-isl          trunking      1
Fa0/14      auto         n-isl          trunking      1
Fa0/15      auto         n-isl          trunking      1

SW3#sh int trunk
Port        Mode         Encapsulation  Status        Native vlan
Fa0/13      auto         n-isl          trunking      1
Fa0/14      auto         n-isl          trunking      1
Fa0/15      auto         n-isl          trunking      1

SW4#sh int trunk
Port        Mode         Encapsulation  Status        Native vlan
Fa0/13      auto         n-isl          trunking      1
Fa0/14      auto         n-isl          trunking      1
Fa0/15      auto         n-isl          trunking      1

Configure all inter-switch links on SW2, SW3, and SW4 to be in dynamic auto state and configure all inter-switch links on SW1 to be in dynamic desirable state.

SW1:
interface range FastEthernet0/13 - 21
switchport mode dynamic desirable
SW2:
interface range FastEthernet0/13 - 21
switchport mode dynamic auto
SW3:
interface range FastEthernet0/13 - 21
switchport mode dynamic auto
SW4:
interface range FastEthernet0/13 - 21
switchport mode dynamic auto

Verification:Using the CAM table verify that all layer 2 traffic between devices in the same VLAN, but not attached to the same switch, is transiting SW1.

R4#ping 155.1.146.6
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 155.1.146.6, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/4 ms
R4#sh arp          
Protocol  Address          Age (min)  Hardware Addr   Type   Interface
Internet  155.1.146.1            85   0025.84e8.6381  ARPA   FastEthernet1/1
Internet  155.1.146.4             -   001b.2ad6.f9d2  ARPA   FastEthernet1/1
Internet  155.1.146.6             0   0007.0e45.7f01  ARPA   FastEthernet1/1
Internet  204.12.1.4              -   001b.2ad6.f9d1  ARPA   FastEthernet1/0
Internet  204.12.1.254            0   001b.2ae2.c9c1  ARPA   FastEthernet1/0

SW2#sh mac addr dynamic address 0007.0e45.7f01
          Mac Address Table
-------------------------------------------

Vlan    Mac Address       Type        Ports
----    -----------       --------    -----
   1    0007.0e45.7f01    DYNAMIC     Fa0/6
 146    0007.0e45.7f01    DYNAMIC     Fa0/6
Total Mac Addresses for this criterion: 2

VLAN assignments on SW1, SW2, SW3, and SW4 to obtain basic connectivity

!SW1:
vlan 7,58,67,79,146
!
interface FastEthernet0/1
switchport access vlan 146
!
interface FastEthernet0/5
switchport access vlan 58
!SW2:
vlan 8,22,43,58
!
interface FastEthernet0/2
switchport access vlan 22
!
interface FastEthernet0/4
switchport access vlan 43
!
interface FastEthernet0/24
switchport access vlan 22
!SW3:
vlan 5,9,43,79
!
interface FastEthernet0/5
switchport access vlan 5
!
interface FastEthernet0/24
switchport access vlan 43
!SW4:
vlan 10,146
!
interface FastEthernet0/4
switchport access vlan 146

Verification:

 SW1#sh int status 
Port      Name               Status       Vlan       Duplex  Speed Type
Fa0/1                        connected    146        a-full  a-100 10/100BaseTX
Fa0/2                        notconnect   1            auto   auto 10/100BaseTX
Fa0/3                        connected    routed     a-full  a-100 10/100BaseTX
Fa0/4                        notconnect   1            auto   auto 10/100BaseTX
Fa0/5                        connected    58         a-full  a-100 10/100BaseTX
Fa0/6                        notconnect   1            auto   auto 10/100BaseTX
Fa0/7                        notconnect   1            auto   auto 10/100BaseTX
Fa0/8                        notconnect   1            auto   auto 10/100BaseTX
Fa0/9                        notconnect   1            auto   auto 10/100BaseTX
Fa0/10                       notconnect   1            auto   auto 10/100BaseTX
Fa0/11                       notconnect   1            auto   auto 10/100BaseTX
Fa0/12                       notconnect   1            auto   auto 10/100BaseTX
Fa0/13                       connected    trunk      a-full  a-100 10/100BaseTX
Fa0/14                       connected    trunk      a-full  a-100 10/100BaseTX
Fa0/15                       connected    trunk      a-full  a-100 10/100BaseTX
Fa0/16                       connected    trunk      a-full  a-100 10/100BaseTX
Fa0/17                       connected    trunk      a-full  a-100 10/100BaseTX
Fa0/18                       connected    trunk      a-full  a-100 10/100BaseTX
Fa0/19                       connected    trunk      a-full  a-100 10/100BaseTX
Fa0/20                       connected    trunk      a-full  a-100 10/100BaseTX
Fa0/21                       connected    trunk      a-full  a-100 10/100BaseTX
Fa0/22                       notconnect   1            auto   auto 10/100BaseTX
Fa0/23                       notconnect   1            auto   auto 10/100BaseTX
Fa0/24                       notconnect   1            auto   auto 10/100BaseTX