Important Points To Remember - Dell Force10 C150 Configuration Manual

Ftos configuration guide ftos 8.4.2.7 e-series terascale, c-series, s-series (s50/s25)

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In at the access point of a VLAN-stacking network, service providers add a VLAN tag, the S-Tag, to each

frame before the 802.1Q tag. From this point, the frame is double-tagged. The service provider uses the

S-Tag, to forward the frame traffic across its network. At the egress edge, the provider removes the S-Tag,

so that the customer receives the frame in its original condition

Figure 46-1. VLAN Stacking in a Service Provider Network

Important Points to Remember

Interfaces that are members of the Default VLAN and are configured as VLAN-Stack access or trunk

ports do not switch untagged traffic. To switch traffic, these interfaces must be added to a non-default

VLAN-Stack-enabled VLAN.

Dell Force10 cautions against using the same MAC address on different customer VLANs, on the

same VLAN-Stack VLAN.

You can ping across a trunk port only if both systems on the link are an E-Series. You cannot ping

across the link if one or both of the systems is a C-Series or S-Series.

This limitation becomes relevant if you enable the port as a multi-purpose port (carrying single-tagged

and double-tagged traffic).

Service Provider Bridging

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