The Network Gateway device places a customer configurable routing device in front of specific customer configured VLANs. The Network Gateway device becomes the first network hop, instead of a SoftLayer Frontend Customer Router (FCR) or Backend Customer Router (BCR).
It is also possible to provision multiple Network Gateway devices together to perform a high-availability group.
The following terminology will be helpful in reviewing this document.
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Associated
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Associating a VLAN with a Network Gateway links the VLAN with a Network Gateway but does NOT route the VLAN to the Network Gateway. A VLAN can be associated with one Network Gateway at a time.
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Bypassed
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VLANs which are in Bypass state with respect to a Network Gateway are being serviced directly by their associated datacenter router. The Network Gateway device is not involved.
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Frontend/Backend Customer Router
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Network devices operated by the datacenter for purposes of routing traffic to/from customer VLANs. The FCR and BCR are controlled by the datacenter.
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Network Gateway
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Customer controlled device which receives traffic from the FCR/BCR for specific configured VLANs and processes that traffic based on rules determined by the customer.
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Routed
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VLANs which are in Routed state with respect to a Network Gateway have their traffic passing through that Gateway.
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VLAN
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A VLAN is a collection of IP subnets (addresses) and datacenter switch ports connected to devices.
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