Abstract
The current trend in deploying automatic control
plane solutions for increased flexibility in the optical
transport layer leads to numerous advantages for both the
operators and the customers, but also pose challenges related
to the stability of the network and its ability to operate
in a robust manner under different failure scenarios. This
work evaluates two rerouting strategies and proposes four
policies for failure handling in a connection-oriented optical
transport network, under generalized multiprotocol label
switching control plane. The performance of the strategies
and the policies are evaluated under multiple correlated
large-scale failures. We employ the Susceptible–Infected–
Disabled epidemic failure spreading model and look into
possible trade-offs between resiliency and resource effi-
ciency. Via extensive simulations, we show that source
rerouting outperforms on-site rerouting, and that there exist
a clear trade-off between policy performance and network
resource consumption, which must be addressed by network
operators for improved robustness of their transport
infrastructures. Applying proactive methods for avoiding
areas where epidemic failures spread results in 50% less
connections requiring recovery, which translates in improved
quality of service to customers and lower recovery expenses
for the network operator.
Original language | English |
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Journal | Photonic Network Communications |
Volume | 29 |
Issue number | 3 |
Pages (from-to) | 330-341 |
ISSN | 1387-974X |
DOIs | |
Publication status | Published - 2015 |
Keywords
- Network control
- Reliability
- Epidemics
- Multiple failures
- Network modelling
- Network simulation