About: Shared Risk Resource Group
Shared risk resource group (commonly referred to as shared risk group or SRG) is a concept in optical mesh network routing that different networks may suffer from a common failure if they share a common risk or a common SRG. SRG is not limited to Optical mesh networks: SRGs are also used in MPLS, IP networks, and synchronous optical networks. An SRG failure makes multiple circuits go down because of the failure of a common resource those networks share. There are three main shared risk groups:
