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單項(xiàng)選擇題

What is required to enable the use of metrics larger then 63 for traffic engineering in IS-IS?()

A. No action required, wide metrics are used by default in IS-IS.
B. Enable wide-metrics-only under protocols IS-IS.
C. Enable traffic-engineering under protocols IS-IS.
D. Disable TLVs 2 and 128 which carry the 6-bit metrics (0-63).

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