Virtual Private LAN Services
7750 SR OS Services Guide Page 813
• Egress PE, egress I-SDP case with force-qtag-forwarding enabled under PBB Epipe or
IVPLS
→ Case 1: I-SDP vc-type = Ethernet VLAN so there is service delimiting tag added after
PW encapsulation.
− The dot1p+DE bits from the QTAG received over the PBB core side are copied to
the QTAG added on the I-SDP.
− The VLAN value in the QTAG might change to match the provisioned value for
the I-SDP configuration.
→ Case 2: I-SDP vc-type = Ethernet (force-vlan-vc-forwarding=not supported for I-
SDPs) so there is no service delimiting tag added on egress PW
− The QTAG received over the PBB core is stripped and the QoS information is
lost.
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