Planet XGS3-24042 User Manual download pdf (Page 704)

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82.1.2 VRF Internet Access Mode 3

In VRF Internet Access Mode 3, as demonstrated in the next figure, VPN site access the Internet via private

network connections between PE and CE. The VRF route tabl eof PE routers contain Internet routes, which

are learnt via the PE routers conencted with the Internet gateway (Internet PE). Internet PE will create an

Internet VRF, and connect withe Internet gateway withe the interface bound with the Internet VRF. Thus , the

Internet gateway will be able to advertise Inernet routes to the VRF route table of the Internet PE. There

routes then will be advertised to VRF of other PE routers as VPNv4 routes. PE routers connected with the

VPN sites needing to access the internet will advertise correspondng VRF routes (only those routes whose

destiatnion segments are globally registered IP addess sub-net in the VPN) to Internet PE via VPNv4 route.

These routes will be added into the Internet VRF and then advertised to Internet by the Internet gateway. The

import and export policy of these routes depend on the route-target configuration of MBGP and vrf. Please

notice that, in this mode, no overlap of address or route is allowed between the VPN sites capable of

accessing the Internet.

It is not recommended for users to access the public network in this mode, for a large number of Internet

routes will be imported to PE.

Figure 81-2 VRF Internet Access Mode 3

82.2 Public Network Access Configuration

Public Network Access Configuration Task Sequence:

1) Configure non-VRP Internet access mode

(1) Configure regular L3VPN

(2) Add a public connection between CE and PE, the connection interface is a non-VRF one.

(3) Filter routes on CE; advertise public network routes to PE via the public network connection.

PE1

VRFA

VRFB

PE2

VRFA

VRFB

MPLS Domain

Internet

Internet PE

Internet

VRF

IGW

export i:i

import a:a

import b:b

import i:i

import b

export b:b

import i:i

import

a:a

Export a:a

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