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Distributing customer routing information between sites

Forwarding customer data packets

Providing an integrated billing solution

Maintaining separation between distinct customer networks

Allowing the implementation of Layer 3 devices in the provider core

In the CSC VPRN, configure an eBGP session between CSC-PE and CSC-CE and use the "advertise-label vpn-ipv4" CLI command to enable the advertisement of VPN-IPv4 routes.

When the customer carrier uses the same autonomous system number in various sites, use the "loop-detect off" CLI command to disable the loop detection functionality on CSC-CE and PE routers.

On the CSC-PE routers, use the "carrier-carrier-vpn" CLI command to configure the VPRN service as CSC.

Configure an iBGP session between PE1 and PE2 and use the "family vpn-ipv4" CLI command to directly exchange end-customer routes learned from CE1 and CE2.

It is an 8 byte value containing 3 fields

The Route Distinguisher must have the same value as the Route Target.

The Administrator field contains either an AS number or an IP number

To ensure uniqueness, Route Distinguishers are assigned by the IANA.

The Route Distinguisher is not used if the customer addresses do not overlap

The Assigned Number field must contain a public IP address

The PE will install a maximum of 40 prefixes into the customer vrf and generate a log message when 40 routes are received

The PE will install a maximum of 40 prefixes into the customer vrf, and generate a log message both when 30 and 41 routes are received

The PE will install a maximum of 40 prefixes into the customer vrf, generate a log message when 10 routes are received and disable learning of new routes at 41

The PE will install a maximum of 40 prefixes into the customer vrf, generate a log message when 10 routes are received and drop the connection at 41

The PE will install a maximum of 40 prefixes into the customer vrf, generate a log message when 4 routes are received and disable learning of new routes at 41

The VPRN ID must be the same value as is used in the vrf-target command

The VPRN ID must be the same value as is used in the route-distinguisher command

The router-id command should not be used in this context

The vrf-target command is mandatory

There is nothing wrong with this configuration

The BGP session from PE to P is not operational

The BGP session between PEs is operational

The BGP session between PE and CE is not operational

The BGP session from PE to CE is operational

The BGP session between PEs is not operational

Within each AS, the ASBR advertises the system addresses of remote PE routers as labeled IPv4 routes.

PE routers in different ASs exchange VPRN routing information directly over MP-eBGP.

Within each AS, MP-iBGP sessions are established to exchange VPN-IPv4 prefixes between the PE routers.

ASBRs exchange the system addresses of PE routers as VPN-IPv4 routes over MP-eBGP.

ASBR1# show router 10 bgp routes vpn-ipv4

ASBR1# show router bgp routes

ASBR1# show router bgp routes vpn-ipv4

ASBR1# show router route-table

No need to build and maintain its own backbone.

The solution scales as the number of serviced customer carriers increases.

The solution scales as the number of VPNs offered by the customer carriers increases.

The ability to manage end-customer services.

PE1

RR1

ASBR1

ASBR2