02-07-2019 01:49 PM - edited 03-03-2019 08:59 AM
Hi,
We have a Cisco 3750 with 12 Fiber Ports. Went this switch was connected to old 2950 works fine but know I am changing to 2960 switches and dont communicate between them. In the Cisco 3750 the trunk port are setup with;
switchport trunk encapsulation dot1q
switchport mode trunk
In the 2960 with
switchport mode trunk
because the 2960 dont have the option of the encapsulation dot1q
And I cant ping from the 3750 to the 2960 and vise-versa
Any recomendation or additional instruction that I need to add to the 2960 switches?
Please let me know.
Thanks
Solved! Go to Solution.
02-08-2019 02:05 PM
As per your config my understanding
3750 (port Gig 3/0/1 ) ---Connected --- (Port Gig 1/0/49) ---2960
Is this correct ?
If So on your 3750 all the ports are in Trunk Mode.
Form testing on 3750 do following steps : ( No changes required on 2960X side for now).
config t
!
Default interface GigabitEthernet3/0/2
Default interface GigabitEthernet3/0/3
!
interface GigabitEthernet3/0/2
switchport mode access
switchport access vlan 10
!
interface GigabitEthernet3/0/3
switchport mode access
switchport access vlan 1
!
interface Vlan1
no shutdown
!
interface Vlan10
no shutdown
!
Try ping locally
Switch#ping 172.10.5.11
remote ping
Switch#ping 172.10.5.15
Switch#ping 192.168.120.11
remote ping
Switch#ping 192.168.120.15
Post the results.
02-07-2019 09:42 PM
02-07-2019 11:13 PM
adding to other post can you also post
show vlan
show run interface XX (part of trunk)
02-08-2019 09:08 AM
02-08-2019 09:19 AM
High level
interface Vlan10
ip address 172.10.5.11 255.255.248.0
no ip route-cache
no ip mroute-cache
shutdown <--- no shut
end
test and advise.
02-08-2019 09:25 AM
02-08-2019 09:32 AM
Can you post both the device full configuration.
show run from both the devices.
02-08-2019 12:37 PM
02-08-2019 02:05 PM
As per your config my understanding
3750 (port Gig 3/0/1 ) ---Connected --- (Port Gig 1/0/49) ---2960
Is this correct ?
If So on your 3750 all the ports are in Trunk Mode.
Form testing on 3750 do following steps : ( No changes required on 2960X side for now).
config t
!
Default interface GigabitEthernet3/0/2
Default interface GigabitEthernet3/0/3
!
interface GigabitEthernet3/0/2
switchport mode access
switchport access vlan 10
!
interface GigabitEthernet3/0/3
switchport mode access
switchport access vlan 1
!
interface Vlan1
no shutdown
!
interface Vlan10
no shutdown
!
Try ping locally
Switch#ping 172.10.5.11
remote ping
Switch#ping 172.10.5.15
Switch#ping 192.168.120.11
remote ping
Switch#ping 192.168.120.15
Post the results.
02-08-2019 02:51 PM
Hi Balaji.bandi,
You are the best. I configure the instruction you send me and now is working. I saw that the 3750 don't create the vlan 10 until I setup a port with this vlan and that was the problem.
Thanks a lot
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