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Spirent KB Article
Doc ID: FAQ15689
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Spirent TestCenter: Do we support MPLS over GRE?
Currently, we do not. What we support is GREoMPLS with following encapsulation Eth+GRE+MPLS(transport label)+MPLS(VPN label)+IP. However, MPLS over GRE requires Eth+GRE+MPLS(VPN label)+IP in the case P-to-P router without MPLS but with the feature (supporting GRE on P Router). This feature is tentatively to be supported by end of July 2016.
Product : LDP,Routing,Windows GUI,OSPF,MPLS,BGP