Restrictions for Ambiguous VLAN Support for IP Sessions over ISG
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Ambiguous VLANs are currently supported only for Inteliigent Services Gateway (ISG) sessions.
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IP sessions and PPP sessions are not supported on the same ambiguous subinterfaces. Hence, different ranges need to be specified for the outer VLAN tags for both IP sessions and PPP sessions.
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Only a limited feature set will be applied to each queue-in-queue (QinQ) pair as no subinterfaces are created for each QinQ pair. The available features include those applicable to the ISG session and those applicable to the ambiguous VLAN interface.
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This feature is restricted to Layer 2 unclassified MAC and DHCP-initiated ISG sessions.
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IPv6 sessions are not supported.
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This feature supports only Ethertype 0x8100. Other Ethertypes such as 0x88A8, 0x9100 and 0x9200 are not supported.
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This feature does not support Virtual Routing and Forwarding (VRF).