Implementing and Operating Cisco Service Provider Network Core Technologies (SPCOR) — Question 252
An ISP Is Implementing end-to-end fault monitoring for a customer based on the IEEE 802.3ah standard. The solution must detect when 15 or more corrupted Ethernet packets arrive within 10 ms and stop propagating traffic through the ISP backbone network or to the customer side. Which configuration must the ISP engineer apply?
Answer options
- A. ethernet oam link-monitoring enable ethernet oam link-monitor crc-errors ingress time-window 10 ethernet oam link-monitor crc-errors ingress threshold high 15 ethernet oam link-monitor crc-errors egress time-window 10 ethernet oam link-monitor crc-errors egress threshold high 15 ethernet oam link-monitor high-threshold action shutdown-interface
- B. ethernet oam link-monitoring ethernet oam link-monitor receive-crc window 15 ethernet oam link-monitor receive-crc threshold high 10 ethernet oam link-monitor high-threshold action disable-interface
- C. ethernet oam ethernet oam link-monitor receive-crc window 10 ethernet oam link-monitor receive-crc threshold high 15 ethernet oam link-monitor transmit-crc window 10 ethernet oam link-monitor transmit-crc threshold high 15 ethernet oam link-monitor high-threshold action errordisable-interface
- D. ethernet oam link-monitoring global enable ethernet oam link-monitor receive crc-errors period 15 ethernet oam link-monitor receive crc-errors limit 15 ethernet oam link-monitor transmit crc-errors period 10 ethernet oam link-monitor transmit crc-errors limit 15 ethernet oam link-monitor limit action error-disable interface
Correct answer: C
Explanation
Option C is correct because it specifies the necessary parameters to detect 15 corrupted packets within a 10 ms window and the appropriate action to take when the threshold is met. The other options do not meet the required conditions or specify actions that would not effectively stop traffic, such as 'disable-interface' or lack the correct window settings.