Virtual Leased Line Services
7210 SAS-X, R6 OS Services Guide Page 125
that operator will configure both end of the service appropriately to ensure only
appropriate packets enter the service.
• When traffic is received on the dot1q SAP, the outermost tag is not stripped and the
VLAN tag corresponding to the outermost tag configured for the QinQ SAP is added to
the packet.
• If the packet is received on a QinQ SAP, assign an incoming packet to this service based
on matching the outermost two tags in the packet header (that is, in other words the first
two tags in the packet header). It will strip only the outermost tag (only a single tag) on
ingress. The VLAN tag corresponding to the outermost tag configured for the QinQ SAP
(that is, the other endpoint) is added to the packet and it is sent out of the QinQ SAP.
Thus, the device processes packets received with 2 or more tags using the MPLS SDP or a dot1q
SAP while classifying on the QinQ SAP ingress using 2 tags.
Feature Support, Configuration notes and Restrictions
A new svc-sap-type value "qinq-inner-tag-preserve" is available for configuring the service. This
must be used when creating a new Epipe service if this functionality is desired (For example:
epipe 10 svc-sap-type qinq-inner-tag-preserve create).
• This service is available only in network mode.
• Epipe service created with the parameter svc-sap-type set to qinq-inner-tag-preserve will
allow for only one QinQ SAP and only one SDP of vc-type ‘vc-vlan’. The system will not
allow the user to use any other SAP in this new service, that is, NULL SAP, Q1. * SAP,
0.* SAP, etc, are not allowed for configuration in this service. The SDP cannot be of vc-
type ‘vc-ether’.
• User can configure vlan-vc-tag value for the SDP, the dot1q SAP VLAN tag value and the
inner tag VLAN value of a QinQ SAP to match the VLAN ID value of the inner tag
specified in the Q1.Q2 SAP configured in the service (example: if the SAP is 1/1/
10:Q1.Q2, then vlan-vc-tag must be set to Q2, the dot1q SAP VLAN value must be Q2,
and the inner tag of another QinQ SAP must be set to Q2). If any other value, other than
QinQ SAP's inner tag is configured for vlan-vc-tag or dot1q SAP VLAN value, or for the
inner tag of the QinQ SAP then it will be errored out by the software. If vlan-vc-tag value
is not configured, it defaults to use the inner VLAN tag value. It is highly recommended
that the customer configure the vlan-vc-tag value to match the VLAN ID value of the
inner tag configured for the QinQ SAP, to avoid misconfiguration.
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