BGP exchanges label bindings along with its VPN-IPv4 routes. A BGP label indicates the
local output interface that can reach the route. Listing 9-19 shows the label bindings for the
VPN-IPv4 routes carried by BGP.
Listing 9-19 shows that 39 is the label the NewYork router with router ID 222.222.222.3
advertised as a label binding for the 200.200.2.0 route. The next several Listings show how
an IP packet from the customer San Francisco site reaches the 200.200.2.1 address in the
New York site across the service provider network.
Listing 9-20 shows label forwarding information for the prefix 222.222.222.3. ...
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