Free Cisco 400-007 Actual Exam Questions - Question 13 Discussion
try to reduce the reconvergence time, but the network is still experiencing delays when having to
reconverge. Which technology will improve the design?
C. Switching to BGP just to fix OSPF reconvergence sounds like overkill. BGP is slower to converge by default and designed for different use cases. Since BFD is already in place but reconvergence is still slow, it might be about how OSPF timers are set or how fast hellos are implemented rather than changing protocols. So, probably better to stick with OSPF optimizations rather than switching protocols here.
I’m thinking A here. OSPF fast hellos can trigger faster failure detection compared to just changing hello and dead timers, which might still be too slow if set high. Since BFD is already in place but reconvergence is still slow, speeding up OSPF’s own hello packets could help. D might help but if intervals are already optimized, it won’t fix the root cause. So, A seems like the better option to improve reconvergence time noticeably.
D imo, tweaking hello and dead intervals directly affects failure detection times, which can speed up convergence more effectively than just fast hellos alone. It’s a more hands-on approach to reduce delays.
Maybe D makes sense if the current intervals are too high; lowering them could speed up failure detection more than just fast hellos. But you gotta be careful not to overload the devices.
A. Fast hellos reduce OSPF hello intervals for quicker failure detection, which can improve reconvergence speed without the risks of drastically changing dead intervals. Seems like a safer tweak than option D here.
B tbh, since BFD is already in place but delays persist, using BFD echo could help by offloading some processing and providing faster failure detection without impacting CPU much. Changing hello and dead intervals (D) or fast hellos (A) might still hit device limits or risk instability if not carefully managed. Switching to BGP (C) seems like overkill and won’t inherently solve OSPF’s reconvergence speed issues. So, enhancing BFD with echo packets seems like the most direct way to improve detection timing here.
D imo, because tweaking hello and dead intervals directly controls how fast OSPF detects failures. Fast hellos (A) help, but if the intervals are still high, reconvergence stays slow.
A imo, enabling OSPF fast hellos cuts down detection time without risking instability that comes with tuning hello/dead intervals too aggressively. It's a more targeted fix for faster reconvergence.
Option A seems worth a shot since fast hellos speed up failure detection without changing dead intervals, which might be too aggressive and cause instability. Could faster hello intervals alone fix the reconvergence delay?
Option D