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Question regarding erspan or rspan – gre tunnel
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Correct Answer:
Explanation/Reference:
– ERSPAN, require GRE tunnelling from source to destination sniffing port.
– Tunnelling done via Loopback address. Supported in 6500, ASR1000, Nexus, 7600
– ASR1000 only support source monitoring only and cannot be destination of the span.
https://supportforums.cisco.com/document/139236/understanding-spanrspanand-erspan