Configuring IP routing and forwarding Configure Virtual Routing and Forwarding (VRF)
Digi TransPort® Routers User Guide
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Configure Virtual Routing and Forwarding (VRF)
Virtual Routing and Forwarding (VRF) is an IP technology that allows multiple instances of a routing
table to coexist on the same router at the same time. Using VRF, you can create multiple routing
tables, and assign each interface to a different VRF. Because the routing instances are independent,
you can use the same or overlapping IP addresses without conflict. VRF also refers to a routing table
instance that can exist in one or multiple instances per each VPN on a Provider Edge (PE) router. You
can enable use of VRF through a license.
VRF-Lite (Multi-VRF)
VRF-Lite is an application based on VRF that extends the concept of VRF to the Customer Edge (CE)
router on the customer's premises. It supports multiple, overlapping, independent routing and
forwarding tables per customer.
You can use any routing protocol supported by normal VRF in a VRF-Lite CE implementation. The CE
supports traffic separation between customer networks. As there is no MPLS functionality on the CE,
no label exchange happens between the CE and PE.
Information model objects (IMOs)
n Virtual Routing Forwarding (VRF) Entity (IVrf)
n Equivalent Routing Entry (IRoutingEntries)
n Virtual Routing Entry (IVrfEntry)
n Multi Protocol BGP Entity (IMpBgp)
n Equivalent Cross Virtual Routing Entry (ICrossVrf)
n Cross Virtual Routing Entry (ICrossVrfRoutingEntry)
Virtual Routing Forwarding (VRF) entity
The Virtual Routing Forwarding (VRF) Entity <XREF> object describes the routing and address
resolution protocols' independent forwarding component of a MPLS-BGP based VPN router. It is bound
by its Logical Sons attribute to all the Network layer IP Interface objects among which it is routing IP
packets.
Attribute
name Attribute description Scheme
Polling
interval
Next Hop
BGP
Address
Next hop Border Gateway Protocol (BGP) IP address IPCore Configuration
Incoming
and
Outgoing
Inner Label
Incoming and outgoing inner MPLS label IPCore Configuration
Outer
Label
Outer MPLS label IPCore Configuration
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