A standard IP interface within an existing IES or VPRN service context may be bound to a service name. A VPLS service only supports binding for a single IP interface.
While an IP interface may only be bound to a single VPLS service, the routing context containing the IP interface (IES or VPRN) may have other IP interfaces bound to other VPLS service contexts. That is, R-VPLS allows the binding of IP interfaces in IES or VPRN services to be bound to VPLS services.