Hi,
Does Cisco NCS 5500 or NCS 540 support EVPN / EVPN IRB VLAN-based service retaining the originating VID when transporting the ethernet frame over the MPLS/IP network? The reason for asking is, all examples in the relevant L2VPN configuration guide always have the command "rewrite ingress tag pop 1 symmetric" configured under the L2 access circuit that pops off the originating VID (C-VLAN) from the packet.
I would like to deploy an RFC7432 compliant VLAN-based service which requires frames transported over MPLS to remain tagged with the originating VID and VID translation be performed at the disposition PE.
<snip from RFC7432 >
6.1. VLAN-Based Service Interface
With this service interface, an EVPN instance consists of only a
single broadcast domain (e.g., a single VLAN). Therefore, there is a
one-to-one mapping between a VID on this interface and a MAC-VRF.
Since a MAC-VRF corresponds to a single VLAN, it consists of a single
bridge table corresponding to that VLAN. If the VLAN is represented
by multiple VIDs (e.g., a different VID per Ethernet segment per PE),
then each PE needs to perform VID translation for frames destined to
its Ethernet segment(s). In such scenarios, the Ethernet frames
transported over an MPLS/IP network SHOULD remain tagged with the
originating VID, and a VID translation MUST be supported in the data
path and MUST be performed on the disposition PE. The Ethernet Tag
ID in all EVPN routes MUST be set to 0.
</snip>
Regards,
Muthu
