Tunneling Modes:
MPLS labels include 3 bits that commonly are used for QoS marking, it is possible to “tunnel DiffServ”—that is, preserve Layer 3 DiffServ markings through a service provider’s MPLS VPN cloud while still performing re-marking (via MPLS EXP bits) within the cloud to indicate in- or out-of-contract traffic.
- Uniform Mode
- Short Pipe Mode
- Pipe Mode
Uniform Mode:
