Refer to the exhibit.
Network administrators need to determine if the QoS settings on their AOS-Switches still meet their needs. Interface 1 is a 1 Gbps interface. Assume that the interface needs to forward this amount of traffic during a time of congestion:
✑ Traffic with default 802.1p value = 600 Mbps
✑ Traffic with the 802.1p value 7 = 600 Mbps
Given the exhibit, how much bandwidth is available for the default traffic?
The available bandwidth for the default traffic corresponds to the Guaranteed Minimum Bandwidth Percentage configured for queue 3, which handles the default 802.1p value traffic. Given the exhibit, queue 3 has a guaranteed 20% of the bandwidth. Since the interface supports 1 Gbps, queue 3 is allocated 200 Mbps. However, considering the competition for bandwidth, with traffic requiring 600 Mbps for queue 7, the rest of the bandwidth for queue 3 can be analyzed as follows: Q3 initially gets 20% (200 Mbps), but since 40% (400 Mbps) remains after accounting for the priority-driven distribution, queue 3 can claim up to 40% (400 Mbps). Thus, under the given traffic conditions, 400 Mbps of bandwidth is available for the default traffic.
Default template is queue 3 for .1p 0, B is correct.
But queue 3 is 20 percent. So it should be 400?!
Sorry, my answer was wrong ;-( calculation error. You are right. Queue 3 is 20 percent from 1Gib/s and this is 200 Mbit/s.
But only 60% or 600Mbps is consumed by Q7, so 40% or 400Mbps is available for the traffic in Q3. The answer should be C. The way GMB and SP scheduling work is: 1.BW is allocated according too GMB percentage (in this case 20% to Q7 and 20% to Q3) 2.60% of the bandwidth remains, this is allocated based on SP schedule piority 3.Q7 needs an additional 40% to get to 600Mbps, 20% remains. Q7 total 60% 4.Q3 needs an additional 40% but there is only 20% left. Q3 total 40% Answer B would be correct if Q6 or Q5 would consume 20% which would give us: Q7:60% Q5/6: 20% Q3:20%