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* MPLS based VPN is easier to
manage VPN sites and VPN membership using multiprotocol based Border Gateway
Protocol (BGP).
* MPLS network domain acts as a
backbone network between VPN users.
* A core router acts as a
providing routers and edge routers acts as costumer edge routers.
* These costumer edge routers
distribute VPN information through MPLS_BGP to other providing routers.
* LSRs that function as ingress
and/or egress routers to the VPN are often called PE (Provider Edge) routers.
* Devices that function only as
transit routers are similarly called P (Provider) routers.
* The job of a Provider router is
significantly easier than that of a PE router, so they can be less complex and
may be more dependable because of this.
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