Spread one Cable with VLAN 40 on Cisco 2960 series

[PrabowoSandi]

Dear All,

I have one cable have set with VLAN40 in my network. And i have some workstations need to connect into same network. Is possible that one cable connect to Cisco 2960 series, and some workstations connect to same Cisco able to get VLAN40 and can working properly?.

How the setup in the Cisco 2960?.

Really appreciate for your help

[balaji.bandi · Accepted solution]

If i understand correctly you like to add another switch with more device which can use same VLAN 40 ?

if yes, then yes you can do, add Trun port between exiting switch and new switch and alliow VLAN 40 in the Trunk and configure ports as access vlan 40, so they can use same network IP address.

[PrabowoSandi]

Dear BB,

Thank you very much for the reply.

Similar like that, actually the one cable coming from another network provider that have set as VLAN40.

And i have some workstations need to connect and have 1 switch Cisco 2960.

If possible i configure one port as Trunk to connect to that cable and other ports set as VLAN40 too?.

Is that can working to some workstations get VLAN40 from my DHCP?.

Can i have the sample of the config?.

Really appreciate it.

Regards

[danjmcintyre · Accepted solution]

Is the cable coming from the provider a trunk port, or an access port in vlan 40 of their network? 

If it's a trunk port, you'd need to know if vlan 40 is tagged or not.

If it's tagged, you would need to know the native vlan of the trunk or you'll get native vlan mismatch notifications constantly. The port configuration would be something like if it was tagged:

interface GigabitEthernet0/1

 description From provider

 switchport mode trunk

 switchport trunk native vlan <native>

 switchport trunk allowed vlan <native>, 40

Or if it's not tagged:

interface GigabitEthernet0/1

 description From provider

 switchport mode trunk

 switchport trunk native vlan 40

 switchport trunk allowed vlan 40

If it's not a trunk and is configured as an access port, your uplink would be something like:

interface GigabitEthernet0/1

 description From provider

 switchport mode access

 switchport access vlan 40

Either way, the PC ports would all be something like:

interface FastEthernet0/1

 description Workstation ###

 switchport mode access

 switchport access vlan 40

A word of warning: If the port from the provider isn't meant to connected to a switch, it may be shutdown by their switch if it has bpduguard or port security enabled on the port, which will probably result in you having to speak to them to have the port unblocked.