Effects of multi-link failures on low priority traffic in MPLS-TE networks

Packet (MPLS-TE) over optical transport networks offer a two-phase restoration procedure against single and multiple concurrent equipment failures, i.e., a relatively faster restoration scheme at the MPLS layer and a relatively slower restoration scheme at the optical layer. This two-phase procedure can be leveraged to efficiently handle network recovery from a disaster-type scenario, while accounting for the traffic assigned priorities. This paper investigates the effects of this two-phase restoration procedure on the low priority traffic performance during and after network recovery.