topic VSP Fabric - analogue of EXOS PSTAG in ExtremeSwitching (VSP/Fabric Engine)

VSP Fabric - analogue of EXOS PSTAG

Alexandr_P — Wed, 02 Sep 2020 20:07:12 GMT

Hello!

Could you please tell about VSP Fabric analogue of EXOS PSTAG?

Is it switched UNI? If yes - what differences?

Thank you!

Re: VSP Fabric - analogue of EXOS PSTAG

Roger_Lapuh — Wed, 02 Sep 2020 20:25:17 GMT

Yes, switched UNI allows you to have a port specific tag on every port and assign them to different ISIDs. So Tag 10 on port 1 might go to ISID 10010 and Tag 10 on port 2 might go to ISID 20010.

Roger

Re: VSP Fabric - analogue of EXOS PSTAG

Alexandr_P — Wed, 02 Sep 2020 20:33:31 GMT

Hello, Roger!

If we will take reverse situation - when we have 2 clients in different VLANs (vlan 10 and 20), they connect to same port (UNI) and in this configuration - service VLAN is 30 (I-SID). In this case would it be switching between them within one switch?

Thank you!

Re: VSP Fabric - analogue of EXOS PSTAG

Roger_Lapuh — Wed, 02 Sep 2020 20:41:36 GMT

no, on the same port you can’t bind two vlans to the same ISID, if this is what you are asking for.

Re: VSP Fabric - analogue of EXOS PSTAG

Alexandr_P — Wed, 02 Sep 2020 20:52:11 GMT

So how I can configure in Fabric VSP switch in case of “we have 2 clients in different VLANs (vlan 10 and 20), they connect to same port (UNI) and in this configuration - service VLAN is 30 (I-SID).” ? (to have PSTAG-like EXOS functions)

Because “switched UNI” functionality is describes what we need:

• Multiple VLANs must be part of the same broadcast domain.

• VLAN ID translation is required

Thank you!

Re: VSP Fabric - analogue of EXOS PSTAG

Roger_Lapuh — Mon, 07 Sep 2020 15:10:56 GMT

Alexandr, the only way I could envision this to work would be to create an external loopback cable where you connect two ISIDs together through a switched-UNI back to back interface. As I said, traffic ingressing on a port from two VLANs can not be switched together into the same ISID, you have to send it into two ISIDs. Those two ISIDs can then be looped together through an external cable.

Makes sense?

Roger