About stacked VLANs
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Note:
This information applies to Passport 8600 modules only.
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A stacked VLAN (sVLAN) transparently tunnels packets through an sVLAN domain by adding an additional 4-byte header to each packet. The packet may already have an IEEE 802.1Q tag, but it is not required.
Routing cannot be enabled on an sVLAN port. sVLAN user-to-network interface (UNI) ports are VLAN unaware and classify any traffic into the sVLAN which is configured on the port. sVLAN network-to-network interface (NNI) ports connect sVLAN switches together and support multiple sVLANs per port.
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Note:
You can enable sVLANs on all ports. If the port belongs to an MLT, however, you should perform all of the sVLAN configuration at the MLT level.
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See also:
