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Exams350-001Questions#63
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350-001 · Question #63

350-001 Question #63: Real Exam Question with Answer & Explanation

The correct answer is A: Class-map match-all CLASS1. In Cisco IOS, the command 'match dscp af41' (without an 'ip' or 'ipv6' qualifier) matches the DSCP value in the traffic class field of both IPv4 and IPv6 packets simultaneously using a single match statement. When used in a 'match-all' class-map with only this one match criterion

Question

Refer to the Exhibit. The displayed QoS configuration has been configured on a router. IPv6 is being implemented on the router, and it is required to convert the QoS policy to support both IPv4 and IPv6 on the same class. Which alternative configuration would allow matching DSCP AF41 for both IPv4 and IPv6 on the same class map?

Options

  • AClass-map match-all CLASS1
  • BClass-map match-all CLASS1
  • CClass-map match-any CLASS1
  • DClass-map match-any CLASS1

Explanation

In Cisco IOS, the command 'match dscp af41' (without an 'ip' or 'ipv6' qualifier) matches the DSCP value in the traffic class field of both IPv4 and IPv6 packets simultaneously using a single match statement. When used in a 'match-all' class-map with only this one match criterion, it will correctly classify AF41-marked traffic regardless of whether it is IPv4 or IPv6. Using 'match-any' with separate 'match ip dscp af41' and 'match ipv6 dscp af41' statements is an alternative, but the single 'match dscp af41' under 'match-all' is the cleaner solution that satisfies the requirement with one class-map entry.

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