You are providing carrier-of-carrier VPN services for AS 100 and AS 200. You want to distribute MPLS labels between your PE routers and the AS 100 and AS 200 CE routers. What must be enabled to accomplish this task?
A.
Use BGP with the inet-vpn address family enabled.
B.
Use BGP with the labeled-unicast address family enabled.
C.
Use RSVP with the lsp-set parameter enabled.
D.
Use RSVP with the tunnel-services parameter enabled.
provider's PE need labeled-unicast to extend its LSPs to the customer CE router. Additionally, inet-vpn is for the multihop MB-EBGP sessioon between customer's PE-1 and custmoer's PE-2
A is correct as here asked about configuration on PE not CEs
https://www.juniper.net/documentation/us/en/software/junos/vpn-l3/topics/topic-map/l3-vpns-carrier-carrier.html
As we are service provider we need to configure PE router -
Link : - https://www.juniper.net/documentation/us/en/software/junos/vpn-l3/topics/topic-map/l3-vpns-carrier-carrier.html#id-configuring-carrier-of-carriers-vpns-for-customers-that-provide-vpn-service__d157e485
To configure the routing instance on the provider’s PE router (or switch) to send labeled routes to the carrier customer’s CE router (or switch), include the following statements:
instance-type vrf;
interface interface-name;
route-distinguisher value;
vrf-import policy-name;
vrf-export policy-name;
protocols {
bgp {
group group-name {
peer-as as-number;
neighbor address {
family inet {
labeled-unicast;
}
}
}
}
}
inet-vpn will be on PE-1 in AS100 and on PE-1 in AS200. That's the whole point of Carrier-of-Carriers: we (AS 65512) don't need to know end customers' (customers of carrier AS100 and carrier AS200) routes. And with labeled-unicast we know addresses of PE-1 in AS 100 and PE-1 in AS 200, so these two PE-1s can form multihop EBGP session with each other. Also see vasiliy19's answer.
Miss-leading questions. Actual A+B. Need inet-vpn between instances and label-unicast between PE and CE.
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