From: nhatphuc (nhatphuc@gmail.com)
Date: Tue Feb 27 2007 - 14:40:29 ART
Hi Group,
In Question 1.6, IEWBv4 Lab 2, I configure pruning on SW1, and vtp pruning
is enabled on the other 3 switches. But when showing int trunk, the trunk
link to switch 2 doesn't prune the nonexistence vlans. My config is the same
as solution.
What could the problem be?
If I encounter the same issue in real lab, what should I do to fix the
problem?
Thanks
This is my config:
SW1#do sh int tru
Port Mode Encapsulation Status Native vlan
Po1 on isl trunking 1
Po2 auto n-802.1q trunking 783
Po3 desirable n-isl trunking 1
Port Vlans allowed on trunk
Po1 1-4094
Po2 1-4094
Po3 1-4094
Port Vlans allowed and active in management domain
Po1 1,3,5-6,8,10,26,33,52,255,783
Po2 1,3,5-6,8,10,26,33,52,255,783
Po3 1,3,5-6,8,10,26,33,52,255,783
Port Vlans in spanning tree forwarding state and not pruned
Po1 1,3,5-6,8,10,26,33,52,255,783
Po2 1,33,52,255,783
Po3 1,255
SW1#sh run
Building configuration...
Current configuration : 2535 bytes
!
version 12.2
no service pad
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname SW1
!
enable password cisco
!
aaa new-model
aaa authentication login default none
!
aaa session-id common
ip subnet-zero
no ip domain-lookup
!
lacp system-priority 1
no file verify auto
spanning-tree mode pvst
spanning-tree extend system-id
!
vlan internal allocation policy ascending
!
!
interface Loopback0
ip address 150.1.7.7 255.255.255.0
!
interface Port-channel1
switchport trunk encapsulation isl
switchport mode trunk
!
interface Port-channel2
switchport trunk native vlan 783
!
interface Port-channel3
switchport mode dynamic desirable
!
interface FastEthernet0/1
no switchport
ip address 132.1.17.7 255.255.255.0
!
interface FastEthernet0/2
!
interface FastEthernet0/3
switchport access vlan 3
!
interface FastEthernet0/4
!
interface FastEthernet0/5
switchport access vlan 5
!
interface FastEthernet0/6
!
interface FastEthernet0/7
!
interface FastEthernet0/8
!
interface FastEthernet0/9
!
interface FastEthernet0/10
switchport access vlan 10
!
interface FastEthernet0/11
switchport access vlan 10
!
interface FastEthernet0/12
!
interface FastEthernet0/13
switchport trunk encapsulation isl
switchport mode trunk
channel-group 1 mode on
!
interface FastEthernet0/14
switchport trunk encapsulation isl
switchport mode trunk
channel-group 1 mode on
!
interface FastEthernet0/15
switchport trunk encapsulation isl
switchport mode trunk
channel-group 1 mode on
!
interface FastEthernet0/16
switchport trunk native vlan 783
channel-group 2 mode active
!
interface FastEthernet0/17
switchport trunk native vlan 783
channel-group 2 mode active
!
interface FastEthernet0/18
switchport trunk native vlan 783
channel-group 2 mode active
!
interface FastEthernet0/19
switchport mode dynamic desirable
channel-group 3 mode active
!
interface FastEthernet0/20
switchport mode dynamic desirable
channel-group 3 mode active
!
interface FastEthernet0/21
shutdown
!
interface FastEthernet0/22
!
interface FastEthernet0/23
!
interface FastEthernet0/24
!
interface GigabitEthernet0/1
!
interface GigabitEthernet0/2
!
interface Vlan1
no ip address
shutdown
!
interface Vlan783
ip address 204.12.1.7 255.255.255.0
!
ip classless
ip http server
ip http secure-server
!
!
radius-server source-ports 1645-1646
!
control-plane
!
!
line con 0
exec-timeout 0 0
privilege level 15
logging synchronous
line vty 0 4
password cisco
line vty 5 15
password cisco
!
end
SW2#do s run
Building configuration...
Current configuration : 2109 bytes
!
version 12.2
no service pad
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname SW2
!
enable password cisco
!
no aaa new-model
ip subnet-zero
no ip domain-lookup
!
!
!
!
!
!
no file verify auto
spanning-tree mode pvst
spanning-tree extend system-id
!
vlan internal allocation policy ascending
!
!
interface Loopback0
ip address 150.1.8.8 255.255.255.0
!
interface Port-channel1
switchport trunk encapsulation isl
switchport mode trunk
!
interface FastEthernet0/1
!
interface FastEthernet0/2
switchport access vlan 26
!
interface FastEthernet0/3
!
interface FastEthernet0/4
!
interface FastEthernet0/5
!
interface FastEthernet0/6
switchport trunk encapsulation dot1q
switchport trunk native vlan 6
switchport mode trunk
switchport nonegotiate
!
interface FastEthernet0/7
!
interface FastEthernet0/8
switchport access vlan 52
!
interface FastEthernet0/9
!
interface FastEthernet0/10
!
interface FastEthernet0/11
!
interface FastEthernet0/12
!
interface FastEthernet0/13
switchport trunk encapsulation isl
switchport mode trunk
channel-group 1 mode on
!
interface FastEthernet0/14
switchport trunk encapsulation isl
switchport mode trunk
channel-group 1 mode on
!
interface FastEthernet0/15
switchport trunk encapsulation isl
switchport mode trunk
channel-group 1 mode on
!
interface FastEthernet0/16
shutdown
!
interface FastEthernet0/17
shutdown
!
interface FastEthernet0/18
shutdown
!
interface FastEthernet0/19
shutdown
!
interface FastEthernet0/20
shutdown
!
interface FastEthernet0/21
shutdown
!
interface FastEthernet0/22
!
interface FastEthernet0/23
!
interface FastEthernet0/24
!
interface GigabitEthernet0/1
!
interface GigabitEthernet0/2
!
interface Vlan1
no ip address
shutdown
!
interface Vlan8
ip address 132.1.8.8 255.255.255.0
!
interface Vlan783
ip address 204.12.1.8 255.255.255.0
!
ip classless
ip http server
ip http secure-server
!
control-plane
!
!
line con 0
exec-timeout 0 0
privilege level 15
logging synchronous
line vty 0 4
password cisco
login
line vty 5 15
password cisco
login
!
end
SW2#sh int tru
Port Mode Encapsulation Status Native vlan
Fa0/6 on 802.1q trunking 6
Po1 on isl trunking 1
Port Vlans allowed on trunk
Fa0/6 1-4094
Po1 1-4094
Port Vlans allowed and active in management domain
Fa0/6 1,3,5-6,8,10,26,33,52,255,783
Po1 1,3,5-6,8,10,26,33,52,255,783
Port Vlans in spanning tree forwarding state and not pruned
Fa0/6 1,3,5-6,8,10,26,33,52,255,783
Po1 1,3,5,10,33,52,255,783
SW2(config-if)#do sh vl
VLAN Name Status Ports
---- -------------------------------- ---------
-------------------------------
1 default active Fa0/1, Fa0/3, Fa0/4, Fa0/5
Fa0/7, Fa0/9, Fa0/10, Fa0/11
Fa0/12, Fa0/16, Fa0/17,
Fa0/18
Fa0/19, Fa0/20, Fa0/21,
Fa0/22
Fa0/23, Fa0/24, Gi0/1, Gi0/2
3 VLAN0003 active
5 VLAN0005 active
6 VLAN0006 active
8 VLAN0008 active
10 VLAN0010 active
26 VLAN0026 active Fa0/2
33 VLAN0033 active
52 VLAN0052 active Fa0/8
255 VLAN0255 active
783 VLAN0783 active
1002 fddi-default act/unsup
1003 token-ring-default act/unsup
1004 fddinet-default act/unsup
1005 trnet-default act/unsup
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