EESky
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Question about Vlan connection in Layer 2 switch
Any expert can explain the vlan routing to me?
Here is topology: PC3 ------ SW1-----PC5. The switch (SW1) is layer 2 switch which connect PC3 and PC5, which are assigned to two vlan, vlan 13 and vlan 15, respectively. At SW1, I created SVI and configured vlan 13 and vlan 15, which are assigned to the SW1 port. The question is that PC3 and PC5 are in different vlan in the Layer 2 switch, why the two PC can ping each other ? Thank you.
Here is topology: PC3 ------ SW1-----PC5. The switch (SW1) is layer 2 switch which connect PC3 and PC5, which are assigned to two vlan, vlan 13 and vlan 15, respectively. At SW1, I created SVI and configured vlan 13 and vlan 15, which are assigned to the SW1 port. The question is that PC3 and PC5 are in different vlan in the Layer 2 switch, why the two PC can ping each other ? Thank you.
ASKER
Thank you for your fast reply
Here is some brief config:
SW1#show run
interface FastEthernet0/3
switchport access vlan 30
no ip address
!
interface FastEthernet0/5
switchport access vlan 50
no ip address
!
interface Vlan30
ip address 13.0.0.1 255.255.255.0
!
interface Vlan50
ip address 15.0.0.1 255.255.255.0
!
SW1#sh ip int bri
Interface IP-Address OK? Method Status Protocol
FastEthernet0/0 unassigned YES unset administratively down down
FastEthernet0/1 unassigned YES unset administratively down down
FastEthernet0/2 unassigned YES unset administratively down down
FastEthernet0/3 unassigned YES unset up up
FastEthernet0/4 unassigned YES unset administratively down down
FastEthernet0/5 unassigned YES unset up up
Vlan30 13.0.0.1 YES manual up up
Vlan50 15.0.0.1 YES manual up up
PC1 and PC2 default gateway is 13.0.0.1 and 15.0.0.1 respectively
Here is some brief config:
SW1#show run
interface FastEthernet0/3
switchport access vlan 30
no ip address
!
interface FastEthernet0/5
switchport access vlan 50
no ip address
!
interface Vlan30
ip address 13.0.0.1 255.255.255.0
!
interface Vlan50
ip address 15.0.0.1 255.255.255.0
!
SW1#sh ip int bri
Interface IP-Address OK? Method Status Protocol
FastEthernet0/0 unassigned YES unset administratively down down
FastEthernet0/1 unassigned YES unset administratively down down
FastEthernet0/2 unassigned YES unset administratively down down
FastEthernet0/3 unassigned YES unset up up
FastEthernet0/4 unassigned YES unset administratively down down
FastEthernet0/5 unassigned YES unset up up
Vlan30 13.0.0.1 YES manual up up
Vlan50 15.0.0.1 YES manual up up
PC1 and PC2 default gateway is 13.0.0.1 and 15.0.0.1 respectively
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ASKER
SW1#sh ip route
Gateway of last resort is not set
13.0.0.0/24 is subnetted, 1 subnets
C 13.0.0.0 is directly connected, Vlan30
15.0.0.0/24 is subnetted, 1 subnets
C 15.0.0.0 is directly connected, Vlan50
I think this is a reason
Thank you
Gateway of last resort is not set
13.0.0.0/24 is subnetted, 1 subnets
C 13.0.0.0 is directly connected, Vlan30
15.0.0.0/24 is subnetted, 1 subnets
C 15.0.0.0 is directly connected, Vlan50
I think this is a reason
Thank you
Yep, it's in layer 3 mode.
You probably already know, but just in case:
no ip routing
to disable layer 3 mode.
no ip routing
to disable layer 3 mode.
ASKER
Thank you !
Can you better explain this part. You lost me here. If you have each computer is assigned to a different vlan, they should not be able to ping each other.
Can you post the switch config?