ā09-23-2010 03:02 AM - edited ā03-06-2019 01:08 PM
Hi All,
I have a problem pinging the ip of the router when i configure encapsulation dot1q in its router fastethernet 0/1
here's the router configuration
Current configuration : 533 bytes
!
version 12.4
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname Router
!
interface FastEthernet0/0
no ip address
duplex auto
speed auto
shutdown
!
interface FastEthernet0/1
no ip address
duplex auto
speed auto
!
interface FastEthernet0/1.1
encapsulation dot1Q 2
ip address 1.1.1.254 255.255.255.0
!
interface Vlan1
no ip address
shutdown
!
ip classless
!
line con 0
line vty 0 4
login
!
end
below is the configuration of the switch where the router is connected
Building configuration...
Current configuration : 1328 bytes
!
version 12.1
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname Switch
!
!
!
interface FastEthernet0/1
switchport mode trunk
spanning-tree portfast
!
interface FastEthernet0/2
!
interface FastEthernet0/3
!
interface FastEthernet0/4
!
interface FastEthernet0/5
!
interface FastEthernet0/6
!
interface FastEthernet0/7
!
interface FastEthernet0/8
!
interface FastEthernet0/9
!
interface FastEthernet0/10
!
interface FastEthernet0/11
!
interface FastEthernet0/12
!
interface FastEthernet0/13
!
interface FastEthernet0/14
!
interface FastEthernet0/15
!
interface FastEthernet0/16
!
interface FastEthernet0/17
!
interface FastEthernet0/18
!
interface FastEthernet0/19
!
interface FastEthernet0/20
!
interface FastEthernet0/21
switchport access vlan 2
switchport mode access
spanning-tree portfast
!
interface FastEthernet0/22
switchport access vlan 4
spanning-tree portfast
!
interface FastEthernet0/23
switchport access vlan 3
switchport mode access
spanning-tree portfast
!
interface FastEthernet0/24
switchport access vlan 2
switchport mode access
spanning-tree portfast
!
interface GigabitEthernet1/1
!
interface GigabitEthernet1/2
!
interface Vlan1
no ip address
shutdown
!
!
line con 0
!
line vty 0 4
login
line vty 5 15
login
!
!
end
and here is the diagram.
all the pc can ping the core switch but if it pings the router it failed.
all vlan configuration are configured on the core switch.
here's the running config of the core switch
Building configuration...
Current configuration : 1288 bytes
!
version 12.2
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname Switch
!
ip routing
!
interface FastEthernet0/1
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface FastEthernet0/2
!
interface FastEthernet0/3
!
interface FastEthernet0/4
!
interface FastEthernet0/5
!
interface FastEthernet0/6
!
interface FastEthernet0/7
!
interface FastEthernet0/8
!
interface FastEthernet0/9
!
interface FastEthernet0/10
!
interface FastEthernet0/11
!
interface FastEthernet0/12
!
interface FastEthernet0/13
!
interface FastEthernet0/14
!
interface FastEthernet0/15
!
interface FastEthernet0/16
!
interface FastEthernet0/17
!
interface FastEthernet0/18
!
interface FastEthernet0/19
!
interface FastEthernet0/20
!
interface FastEthernet0/21
!
interface FastEthernet0/22
!
interface FastEthernet0/23
!
interface FastEthernet0/24
!
interface GigabitEthernet0/1
!
interface GigabitEthernet0/2
!
interface Vlan1
no ip address
shutdown
!
interface Vlan2
ip address 1.1.1.64 255.255.255.0
!
interface Vlan3
ip address 1.1.2.64 255.255.255.0
!
interface Vlan4
ip address 1.1.3.64 255.255.255.0
!
ip classless
!
line con 0
line vty 0 4
login
!
end
what must be wron on my configuration?
Please help!!!!
thanks,
nhel
ā09-23-2010 03:09 AM
Looking at the diagram fa0/24 is the uplink to the router but you have fa0/24 configured as an access port ie.
interface FastEthernet0/24
switchport access vlan 2
switchport mode access
spanning-tree portfast
if you only want vlan 2 on that link then your router config is wrong, ie. you do not need subinterfaces and you can just configuer the router as -
interface FastEthernet0/1
ip address 1.1.1.254 255.255.255.0
duplex auto
speed auto
!
and then remove the subinterface configuration.
If you want to actually have other vlans on this link and have mutliple subinterfaces on the router then you need to change the switchport config on your switch to -
int fa0/24
switchport mode trunk
switchport trunk encapsulation dot1q
Not sure which one you actually want to do ?
Jon
ā09-23-2010 06:19 AM
Also you need to determine who is going to do the routing for vlan 2 , the router or the switch . It should not be in both places the way you have it now .
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