چستVRF

[B]VRF [/B][COLOR=#333333][FONT=Arial]is an [/FONT][/COLOR][B]extension of IP routing[/B][COLOR=#333333][FONT=Arial] that provides multiple routing instances. It provides a separate IP routing and forwarding table to each VPN and is used in concert with MP-iBGP (Multi-Protocol internal BGP) between provider equipment (PE) routers to provide Layer 3 MPLS-VPN. However, ML-Series VRF implementation is without MP-iBGP. With VRF Lite, the ML Series is considered a PE-extension or a customer equipment (CE)-extension. [/FONT][/COLOR][B]VRF Lite is[/B][COLOR=#333333][FONT=Arial] considered a [/FONT][/COLOR][B]PE-extension[/B][COLOR=#333333][FONT=Arial] since its has VRF ([/FONT][/COLOR][B]but without MP-iBGP[/B][COLOR=#333333][FONT=Arial]), and it is considered a CE-extension since this CE can have multiple VRFs and serves many customer with one CE box
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[/COLOR][/FONT][/LEFT][url=http://www.ciscozine.com/2010/07/13/hub-spoke-an-example-of-vrf-lite/]Hub & Spoke: an example of VRF-Lite | CiscoZine[/url][LEFT][FONT=Arial, Helvetica, sans-serif][COLOR=#000000]

[/COLOR][/FONT][/LEFT][url=http://www.cisco.com/en/US/docs/net_mgmt/vpn_solutions_center/1.1/user/guide/VPN_UG1.html#wp1018964]Introduction to Cisco MPLS VPN Technology[/url]

[url=http://www.cisco.com/en/US/docs/ios/mpls/configuration/guide/mp_vpn_ipv4_ipv6.html]MPLS VPN—VRF CLI for IPv4 and IPv6 VPNs[/url]

[url=http://www.cisco.com/web/about/security/intelligence/agm-vrf.htm]Integrating Cisco Anomaly Guard Module and VRF-Lite - Cisco Systems[/url]