Dell S4820T, Configuration Manual

Page: 1089 / 1178

Guidelines for Enabling the VLT Proxy Gateway
Keep the following points in mind when you enable a VLT proxy gateway:
• Proxy gateway is supported only for VLT; for example, across a VLT domain.
• You must enable the VLT
peer-routing
command for the VLT proxy gateway to function.
• Asymmetric virtual local area network (VLAN) configuration, such as the same VLAN configured with
Layer 2 (L2) mode on one VLT domain and L3 mode on another VLT domain is not supported. You
must always configure the same mode for the VLANs across the VLT domain.
• You must maintain VLAN symmetry within a VLT domain.
• The connection between DCs must be a L3 VLT in eVLT format . For more information, refer to the
eVLT Configuration Example
• The trace route across the DCs can show extra hops.
• To ensure no traffic drops, you must maintain route symmetry across the VLT domains. When the
routing table across DCs is not symmetrical, there is a possibility of a routing miss by a DC that does
not have the route for L3 traffic. Because routing protocols are enabled and both DCs are in the same
subnet, there is no dynamic route asymmetry. But if you configure a static route on one DC and not
on the other, there is asymmetry.
VLT Proxy Gateway
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