asset audit

Asset audit is a tunneling technology that envelops an IP packet with an MPLS label that has its own field definitions for routing and QoS. More than one MPLS label can be used to envelop a packet. Typically, two labels are used in most MPLS VPN scenarios. In some scenarios, three labels are used. MPLS labels contain 3 bits for CoS marking. These bits are referred to as the MPLS EXP bits

The possible values of the MPLS EXP bits for CoS are the same as those for 802.1Q/p CoS and IP Precedence. Because of the same length translations (3 bits to/from 6 bits) explained earlier for 802.1Q/p CoS, IP Precedence (which are 3 bits) readily can be mapped into and out of MPLS EXP values, but DSCP values (which are 6 bits) cannot be maintained at the same asset audit granularity.