In a carrier-of-carrier VPN model, which type of network layer reachability information is used for the MP-BGP
signaling between CE and PE routers?
A.
inet-vpn
B.
flow
C.
labeled-unicast
D.
unicast
Explanation:
In a Carrier-of-Carrier VPN environment, specify the inet-vpn address family and unicast traffic type to enable
BGP to carry IPv4 network layer reachability information (NLRI) for VPN routes.
http://www.juniper.net/documentation/en_US/junos15.1/topics/example/mpls-vpn-option2-
configuration.html
I find this question tricky, I think it should be labeled-unicast.
Agreed
C
https://www.juniper.net/documentation/en_US/junos/topics/usage-guidelines/vpns-configuring-carrier-of-carriers-vpns-for-customers-that-provide-vpn-service.html
Configuring BGP
In the BGP configuration for the carrier-of-carriers customer’s CE router (or switch), configure a group that includes the labeled-unicast statement to extend VPN service to the PE router (or switch)connected to the end customer’s CE router (or switch):
bgp {
group group-name {
type internal;
local-address address;
neighbor address {
family inet {
labeled-unicast;
}
}
}
}
C correct
Include the labeled-unicast statement in the configuration for the IBGP session to the carrier-of-carriers customer’s CE router (or switch) ,
and include the family-inet-vpn statement in the configuration for the IBGP session to the carrier-of-carriers PE router (or switch) on the other side of the network
yes C