Automation is one of the key features of GMPLS that allows dynamic provisioning of optical transport connections between IP routers and optical network elements2. Automation reduces the operational time and administrative overhead required to provision new connectivity, which in turn reduces the operational expenditure (OPEX) of the network. Reducing CAPEX, providing resilience against multiple failures, and supporting multi-vendor networks are not direct benefits of automation, but rather possible outcomes of using GMPLS in general. References:
1: Nokia GMPLS-controlled Optical Networks Course | Nokia
2: GMPLS - Nokia
3: Traffic survivability through Protection and Restoration Combined (PRC) - YouTube
[4]: GMPLS: Architecture and Applications - Google Books
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