5G networks are slated to provide a wide range of services. A critical issue in service delivery in 5G network is its resilience. In this work, we present a framework for network survivability in next generation 5G networks. We propose a 5G network architecture with network virtualization with multiple providers, and a self organizing ad hoc network among the eNBs (macrosites) that may use another provider for network resilience when the aggregation network and the backhaul network fail. We then present an optimization formulation for network survivability for our proposed 5G networks. We present results on the trade-off between using a provider's own network or rely on auxiliary capacity from another provide. Our simulation shows promising results in terms of percentage of demands that can be met during such failures.