topic Re: Virtual wire for two different VLANs! in General Topics

Virtual wire for two different VLANs!

Besfort — Mon, 18 Aug 2014 07:43:42 GMT

Hi,

I wanted to apply a virtual wire between two sub-interfaces 1.10 and 2.20, which are basically in two different VLAN ID (10 and 20), but I'm getting an error saying that sub-interfaces cannot have interfaces with different VLAN (10/20).

Is this the default behavior for virtual wire, or am I missing something?

Thanks,

-B

Re: Virtual wire for two different VLANs!

Besfort — Mon, 18 Aug 2014 10:05:18 GMT

or is there any option to set the vlan as native vlan ...

Re: Virtual wire for two different VLANs!

VinceM — Mon, 18 Aug 2014 11:42:08 GMT

Hi,

FIrst, vwire can only be configured between physical interfaces. After that you can configure Vwire sub interface per vlan.

Second, as Vwire is transparent, no reason for having different vlan on each interface 🙂

Hope help

Re: Virtual wire for two different VLANs!

Besfort — Mon, 18 Aug 2014 12:17:20 GMT

OK it's a misconfiguration on my network, because it doesn't make sense to have two different vlans.

It wont work even with the router, but router in this case is using the Native Vlan to accept all untagged traffic.

Regards,

Re: Virtual wire for two different VLANs!

VinceM — Mon, 18 Aug 2014 12:20:59 GMT

Hi,

If question is answer, please to close it.

Keep in mind, if you need to allow taggued vlan to go through vwire, you have to allow it:

Hope help

Re: Virtual wire for two different VLANs!

Besfort — Mon, 18 Aug 2014 13:52:33 GMT

thank you Vince.

Re: Virtual wire for two different VLANs!

Besfort — Wed, 20 Aug 2014 15:19:32 GMT

Below is the answer for Native VLAN:

Setting a VLAN as a native VLAN on Cisco turns off tagging.

The PAN device has no concept of "Native VLAN". The logical interface assigned to the physical interface would be the interface to accept untagged vlans.

If the following interfaces are created:

Eth1/1 ---- Untagged Traffic
Eth1/1.100 --- Tagged with VLID = 100
Eth1/1.200 --- Tagged with VLID = 200

On the Cisco switch configure VLAN 200 to be the "Native VLAN", then the packets exiting the switch would have no tag. These packets would enter the PAN device on Eth1/1 because it is expecting untagged traffic.

owner: skrall

Native VLAN Configuration

Re: Virtual wire for two different VLANs!

snaft — Thu, 21 Aug 2014 12:05:16 GMT

If you've got two wires with different VLAN's chances are that you are running two different logical networks as well (ie. different ip networks). If, however, the same ip network is present on both VLAN's you can use L2 interfaces instead of vwire and then do VLAN translation between them.

BR,
Nicolai