hello everyone
I have a problem and i hope to find the solution here so i have a lab with 3 switches 1 core and 2 aggr all the switches are linked together using etherchannel and MSTP
all the switches have hosts on valns 10 20 30 40 50 60
all the informations are below in the config
MY PROBLEM IS WHY SWITCH 3 IS BLOKING THE VLAN
hosts int switch 1 and 2 can reach each other and also can reach switch 3 but SWITCH CAN NOT REACH ANY OF THEM
I WILL BE HAPPY IF SOMEONE GIVE THE SOLUTION
this is the diagram
SWITCH 1CORE CONFIG
S1(config)#do sh run
Building configuration...
Current configuration : 3153 bytes
!
! Last configuration change at 02:42:14 UTC Tue Sep 14 2021
!
version 15.1
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
service compress-config
!
hostname S1
!
boot-start-marker
boot-end-marker
!
!
logging discriminator EXCESS severity drops 6 msg-body drops EXCESSCOLL
logging buffered 50000
logging console discriminator EXCESS
!
no aaa new-model
no ipv6 cef
ipv6 multicast rpf use-bgp
no ip icmp rate-limit unreachable
!
no ip domain-lookup
ip cef
!
!
!
!
!
spanning-tree mode mst
spanning-tree extend system-id
!
spanning-tree mst configuration
name INE
revision 6767
instance 1 vlan 10, 20
instance 2 vlan 30, 40
instance 3 vlan 50, 60
!
spanning-tree mst 1-3 priority 24576
!
!
!
!
vlan internal allocation policy ascending
!
ip tcp synwait-time 5
!
!
!
!
!
!
!
!
!
interface Port-channel1
switchport
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface Port-channel2
switchport
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface Ethernet0/0
duplex auto
!
interface Ethernet0/1
switchport trunk encapsulation dot1q
switchport mode trunk
duplex auto
channel-protocol pagp
channel-group 2 mode desirable
!
interface Ethernet0/2
switchport trunk encapsulation dot1q
switchport mode trunk
duplex auto
channel-protocol pagp
channel-group 1 mode desirable
!
interface Ethernet0/3
duplex auto
!
interface Ethernet1/0
switchport trunk encapsulation dot1q
switchport mode trunk
duplex auto
channel-protocol pagp
channel-group 1 mode desirable
!
interface Ethernet1/1
duplex auto
!
interface Ethernet1/2
switchport trunk encapsulation dot1q
switchport mode trunk
duplex auto
channel-protocol pagp
channel-group 2 mode desirable
!
interface Ethernet1/3
duplex auto
!
interface Ethernet2/0
duplex auto
!
interface Ethernet2/1
duplex auto
!
interface Ethernet2/2
switchport access vlan 10
switchport mode access
duplex auto
spanning-tree portfast
!
interface Ethernet2/3
switchport access vlan 20
switchport mode access
duplex auto
spanning-tree portfast
!
interface Ethernet3/0
switchport access vlan 30
switchport mode access
duplex auto
spanning-tree portfast
!
interface Ethernet3/1
switchport access vlan 40
switchport mode access
duplex auto
spanning-tree portfast
!
interface Ethernet3/2
switchport access vlan 50
switchport mode access
duplex auto
spanning-tree portfast
!
interface Ethernet3/3
switchport access vlan 60
switchport mode access
duplex auto
spanning-tree portfast
!
interface Vlan1
no ip address
shutdown
!
interface Vlan10
ip address 192.168.10.1 255.255.255.0
!
interface Vlan20
ip address 192.168.20.1 255.255.255.0
!
interface Vlan30
ip address 192.168.30.1 255.255.255.0
!
interface Vlan40
ip address 192.168.40.1 255.255.255.0
!
interface Vlan50
ip address 192.168.50.1 255.255.255.0
!
interface Vlan60
ip address 192.168.60.1 255.255.255.0
!
!
no ip http server
!
!
!
!
!
control-plane
!
!
line con 0
exec-timeout 0 0
privilege level 15
logging synchronous
line aux 0
exec-timeout 0 0
privilege level 15
logging synchronous
line vty 0 4
login
!
end
SWITCH 2 CONFIG
S2(config)#do sh run
Building configuration...
Current configuration : 2972 bytes
!
! Last configuration change at 02:42:10 UTC Tue Sep 14 2021
!
version 15.1
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
service compress-config
!
hostname S2
!
boot-start-marker
boot-end-marker
!
!
logging discriminator EXCESS severity drops 6 msg-body drops EXCESSCOLL
logging buffered 50000
logging console discriminator EXCESS
!
no aaa new-model
no ipv6 cef
ipv6 multicast rpf use-bgp
no ip icmp rate-limit unreachable
!
no ip domain-lookup
ip cef
!
!
!
!
!
spanning-tree mode mst
spanning-tree extend system-id
!
spanning-tree mst configuration
name INE
revision 6767
instance 1 vlan 10, 20
instance 2 vlan 30, 40
instance 3 vlan 50, 60
!
spanning-tree mst 1-3 priority 28672
!
!
!
!
vlan internal allocation policy ascending
!
vlan 10
name IT
!
vlan 20
name PR
!
vlan 30
name HR
!
vlan 40
name SLAES
!
vlan 50
name SUPPORT
!
vlan 60
name SOCIAL
!
ip tcp synwait-time 5
!
!
!
!
!
!
!
!
!
interface Port-channel3
switchport
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface Port-channel2
switchport
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface Ethernet0/0
switchport trunk encapsulation dot1q
switchport mode trunk
duplex auto
channel-protocol pagp
channel-group 3 mode desirable
!
interface Ethernet0/1
switchport trunk encapsulation dot1q
switchport mode trunk
duplex auto
channel-protocol pagp
channel-group 2 mode desirable
!
interface Ethernet0/2
duplex auto
!
interface Ethernet0/3
switchport trunk encapsulation dot1q
switchport mode trunk
duplex auto
channel-protocol pagp
channel-group 3 mode desirable
!
interface Ethernet1/0
duplex auto
!
interface Ethernet1/1
duplex auto
!
interface Ethernet1/2
switchport trunk encapsulation dot1q
switchport mode trunk
duplex auto
channel-protocol pagp
channel-group 2 mode desirable
!
interface Ethernet1/3
duplex auto
!
interface Ethernet2/0
duplex auto
!
interface Ethernet2/1
duplex auto
!
interface Ethernet2/2
switchport access vlan 10
switchport mode access
duplex auto
spanning-tree portfast
!
interface Ethernet2/3
switchport access vlan 20
switchport mode access
duplex auto
spanning-tree portfast
!
interface Ethernet3/0
switchport access vlan 30
switchport mode access
duplex auto
spanning-tree portfast
!
interface Ethernet3/1
switchport access vlan 40
switchport mode access
duplex auto
spanning-tree portfast
!
interface Ethernet3/2
switchport access vlan 50
switchport mode access
duplex auto
spanning-tree portfast
!
interface Ethernet3/3
switchport access vlan 60
switchport mode access
duplex auto
spanning-tree portfast
!
interface Vlan1
no ip address
shutdown
!
!
no ip http server
!
!
!
!
!
control-plane
!
!
line con 0
exec-timeout 0 0
privilege level 15
logging synchronous
line aux 0
exec-timeout 0 0
privilege level 15
logging synchronous
line vty 0 4
login
!
end
SWITCH 3 CONFIG
S3(config-if)#do sh run
Building configuration...
Current configuration : 2935 bytes
!
! Last configuration change at 02:42:06 UTC Tue Sep 14 2021
!
version 15.1
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
service compress-config
!
hostname S3
!
boot-start-marker
boot-end-marker
!
!
logging discriminator EXCESS severity drops 6 msg-body drops EXCESSCOLL
logging buffered 50000
logging console discriminator EXCESS
!
no aaa new-model
no ipv6 cef
ipv6 multicast rpf use-bgp
no ip icmp rate-limit unreachable
!
no ip domain-lookup
ip cef
!
!
!
!
!
spanning-tree mode mst
spanning-tree extend system-id
!
spanning-tree mst configuration
name INE
revision 6767
instance 1 vlan 10, 20
instance 2 vlan 30, 40
instance 3 vlan 50, 60
!
!
!
!
!
vlan internal allocation policy ascending
!
vlan 10
name IT
!
vlan 20
name PR
!
vlan 30
name HR
!
vlan 40
name SLAES
!
vlan 50
name SUPPORT
!
vlan 60
name SOCIAL
!
ip tcp synwait-time 5
!
!
!
!
!
!
!
!
!
interface Port-channel1
switchport
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface Port-channel3
switchport
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface Ethernet0/0
switchport trunk encapsulation dot1q
switchport mode trunk
duplex auto
channel-protocol pagp
channel-group 3 mode desirable
!
interface Ethernet0/1
duplex auto
!
interface Ethernet0/2
switchport trunk encapsulation dot1q
switchport mode trunk
duplex auto
channel-protocol pagp
channel-group 1 mode desirable
!
interface Ethernet0/3
switchport trunk encapsulation dot1q
switchport mode trunk
duplex auto
channel-protocol pagp
channel-group 3 mode desirable
!
interface Ethernet1/0
switchport trunk encapsulation dot1q
switchport mode trunk
duplex auto
channel-protocol pagp
channel-group 1 mode desirable
!
interface Ethernet1/1
duplex auto
!
interface Ethernet1/2
duplex auto
!
interface Ethernet1/3
duplex auto
!
interface Ethernet2/0
duplex auto
!
interface Ethernet2/1
duplex auto
!
interface Ethernet2/2
switchport access vlan 10
switchport mode access
duplex auto
spanning-tree portfast
!
interface Ethernet2/3
switchport access vlan 20
switchport mode access
duplex auto
spanning-tree portfast
!
interface Ethernet3/0
switchport access vlan 30
switchport mode access
duplex auto
spanning-tree portfast
!
interface Ethernet3/1
switchport access vlan 40
switchport mode access
duplex auto
spanning-tree portfast
!
interface Ethernet3/2
switchport access vlan 50
switchport mode access
duplex auto
spanning-tree portfast
!
interface Ethernet3/3
switchport access vlan 60
switchport mode access
duplex auto
spanning-tree portfast
!
interface Vlan1
no ip address
shutdown
!
!
no ip http server
!
!
!
!
!
control-plane
!
!
line con 0
exec-timeout 0 0
privilege level 15
logging synchronous
line aux 0
exec-timeout 0 0
privilege level 15
logging synchronous
line vty 0 4
login
!
end
