300-510 · Question #217
Level 3 switch SW1 is part of an EIGRP enabled network located at the edge of an area. Cisco Express Forwarding and SSO are enabled on the router. A network engineer must minimize the downtime of…
The correct answer is B. Configure timers nsf route-hold 120 under the global EIGRP configuration. EIGRP NSF (Non-Stop Forwarding) with SSO allows EIGRP to maintain forwarding during a supervisor switchover and suppress routing reconvergence. The 'timers nsf route-hold' command under the global EIGRP configuration controls how long EIGRP retains stale routes in the routing…
Question
Level 3 switch SW1 is part of an EIGRP enabled network located at the edge of an area. Cisco Express Forwarding and SSO are enabled on the router. A network engineer must minimize the downtime of data-transmit services in the network. HSRP group 2 has already been configured with standby preempt delay minimum 2 and standby timers 140. Which additional action must the engineer take on SW1 to suppress routing flaps for 2 minutes?
Options
- AConfigure timers standby 2 wait 2 under the HSRP group 2 configuration.
- BConfigure timers nsf route-hold 120 under the global EIGRP configuration.
- CConfigure timers nsf signal 2 under the global EIGRP IPv4 address family.
- DConfigure timers standby 2 coverage 120 under the HSRP group 2 configuration.
How the community answered
(21 responses)- A5% (1)
- B81% (17)
- C10% (2)
- D5% (1)
Explanation
EIGRP NSF (Non-Stop Forwarding) with SSO allows EIGRP to maintain forwarding during a supervisor switchover and suppress routing reconvergence. The 'timers nsf route-hold' command under the global EIGRP configuration controls how long EIGRP retains stale routes in the routing table during an NSF event, preventing route withdrawals and flaps. Setting it to 120 seconds (2 minutes) meets the requirement to suppress routing flaps for 2 minutes. The HSRP 'standby preempt delay minimum 2' is already configured for the gateway failover delay. Choices A and D are HSRP-specific timer commands unrelated to routing flap suppression. Choice C ('timers nsf signal') controls the NSF signal timer, not the route-hold duration.
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