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I suggest you print out the name of the interface before trying to get its MAC address, and investigate the characteristics of the one that fails. Probably it is one that doesn't have a MAC address, e.g. 127.0.0.1.1 person found this helpful
Thanks for your reply.
The exception is specifically from the network interface between M5000 service processor and each domain.
In my case, I just need to catch this exception, and continue to get mac address from other interfaces.