03-17-2011 11:49 AM - edited 03-06-2019 04:08 PM
I've attatched the packet tracer file to see if anyone can figure out why
I can't communicate across vlans. Pretty sure its a simple fix for you wizards out there.
Solved! Go to Solution.
03-17-2011 02:09 PM
Kevin
Any chance you could post as a doc or something because not all of use packet tracer.
Things to check -
1) from a client in vlan 10 (for example) can you ping the vlan 10 SVI address
2) from a client in vlan 10 can you ping another SVI ip address on the switch
3) do you have the correct default-gateways set for the client
4) any access-lists configured
Jon
03-17-2011 04:18 PM
Check default gateway on the client and subnet mask
Can you ping yourself (on both the router and the pc)
Is the pc in the right vlan?
sho mac-address
sho ip arp
Both are your friends
03-18-2011 12:18 AM
Hi,
In each VLAN the gateway was unaccessible so there was surely a problem on the link between the 3560 and the 2960.
Logging into 3560, the VLAN interfaces were up/down.
Resolution: on the 3560 change the f0/1 back to a L2 port with the command switchport --->the nterfaces go up/up
Then a native vlan mismatch message appears on the 3560: vlan 1 on this side and vlan 99 on the other side
Resolution: on f0/1 put these commands
-switchport trunk encapsulation dot1q
-switchport mode trunk
-switchport trunk native vlan 99
Regards.
Alain.
03-17-2011 02:09 PM
Kevin
Any chance you could post as a doc or something because not all of use packet tracer.
Things to check -
1) from a client in vlan 10 (for example) can you ping the vlan 10 SVI address
2) from a client in vlan 10 can you ping another SVI ip address on the switch
3) do you have the correct default-gateways set for the client
4) any access-lists configured
Jon
03-17-2011 04:18 PM
Check default gateway on the client and subnet mask
Can you ping yourself (on both the router and the pc)
Is the pc in the right vlan?
sho mac-address
sho ip arp
Both are your friends
03-18-2011 12:18 AM
Hi,
In each VLAN the gateway was unaccessible so there was surely a problem on the link between the 3560 and the 2960.
Logging into 3560, the VLAN interfaces were up/down.
Resolution: on the 3560 change the f0/1 back to a L2 port with the command switchport --->the nterfaces go up/up
Then a native vlan mismatch message appears on the 3560: vlan 1 on this side and vlan 99 on the other side
Resolution: on f0/1 put these commands
-switchport trunk encapsulation dot1q
-switchport mode trunk
-switchport trunk native vlan 99
Regards.
Alain.
03-18-2011 05:44 AM
Thanks guys all of your suggestions helped. Problem solved.
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