3. Configure an IGP.
4. Configure LDP.
5. Configure VRF.
6. Enable carrier-of-carriers support on the VRF; use the mpls topology-driven-lsp
command in the context of the VRF virtual router to enable MPLS support.
7. Enable LDP on the interface in the VRF that connects to the customer carrier’s
PE router.
8. Use the show ip bgp vpnv4 vrf vrfname summary command to verify that
carrier-of-carriers support is enabled.
On all of the customer carrier’s routers, configure:
1. MPLS
2. An IGP
3. LDP
On the customer carrier’s PE router that connects to the end customer’s CE router,
additionally configure:
1. BGP
2. VRF
Enabling Carrier-of-Carriers Support on a VRF
In a carrier-of-carriers environment, a provider carrier creates a backbone VPN that
is used by a customer carrier. You must enable carrier-of-carriers support on the VRF
of the provider carrier’s PE device that connects to the PE device of the customer
carrier.
mpls topology-driven-lsp
â– Use in the context of the VRF virtual router to enable carrier-of-carriers support
in a VRF. The VRF is on a PE router that is in the provider carrier’s VPN and that
connects to the customer carrier’s PE router.
â– Use the show ip bgp vpnv4 vrf vrfName summary command to verify whether
carrier-of-carriers mode is enabled on a VRF. The output includes a line indicating
the status:
Carrier’s carrier mode is enabled.
â– Example
host1:vr1:VrfA(config)#mpls topology-driven-lsp
â– Use the no version to disable carrier-of-carriers mode on the VRF.
â– See mpls topology-driven-lsp.
474 â– Carrier-of-Carriers IPv4 VPNs
JUNOSe 11.1.x BGP and MPLS Configuration Guide
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