4A0-107 practice question 24 of 30

Which of the following are entities of the Nokia 7750 SR on which you can NOT apply a network- queue policy? (Choose three)

Full set: 231 questions
Answer options
A: Router interfaces Correct answer
B: Ingress MDA
C: Ingress Ethernet network ports Correct answer
D: Egress Ethernet network ports
E: Service SAPs Correct answer
Correct Answer:
A. Router interfaces; C. Ingress Ethernet network ports; E. Service SAPs
Explanation

A network-queue policy is a QoS object that can be bound only to
• the ingress side of an MDA and
• the egress side of an Ethernet network port. Router interfaces build their queues from “queue-group” templates, and service SAPs use SAP-ingress / SAP-egress queue policies. Because a network-queue policy is not accepted on router interfaces, on SAPs, or on the ingress direction of a network port, the three entities listed above cannot have such a policy attached.

Why Incorrect

B. Ingress MDA – CLI command card mda ingress-qos network-queue permits binding.
D. Egress Ethernet network ports – CLI command port ethernet network qos network-queue permits binding.

References

1. Nokia SR OS 22.5.R1 Quality of Service Guide, “Network Queue Policies”, pp. 193-198: “A network-queue policy can be applied to the ingress side of an MDA and to the egress side of a network (Ethernet) port.”

2. Nokia SR OS 22.5.R1 Interface Configuration Guide, §4.3 “Router-Interface QoS”, p. 145: router interfaces accept queue-groups, not network-queue policies.

3. Nokia SR OS 22.5.R1 Service Configuration Guide, §7.2 “SAP QoS Overview”, p. 321: SAPs are associated with SAP-ingress and SAP-egress queue policies, not network-queue policies.

4. Nokia SR OS 22.5.R1 Command Reference, “port ethernet network qos network-queue”, p. 612: shows binding of a network-queue policy only at egress port level.

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