300-710 · Question #303
A network engineer is deploying a pair of Cisco Secure Firewall Threat Defense devices managed by Cisco Secure Firewall Management Center for High Availability. Internet access is a high priority…
The correct answer is A. Route Tracking D. SLA Monitor. To achieve ISP redundancy when one ISP link goes down, you need two complementary features: SLA Monitor (D) uses ICMP probes (IP SLA) to continuously test reachability through each ISP by pinging a target IP address. Route Tracking (A) ties a static default route to the result…
Question
A network engineer is deploying a pair of Cisco Secure Firewall Threat Defense devices managed by Cisco Secure Firewall Management Center for High Availability. Internet access is a high priority for the business and therefore they have invested in internet circuits from two different ISPs. The requirement from the customer is that internet access must be available to their users even if one of the ISPs is down. Which two features must be deployed to achieve this requirement? (Choose two.)
Options
- ARoute Tracking
- BRedundant interfaces
- CEtherChannel interfaces
- DSLA Monitor
- EBGP
How the community answered
(31 responses)- A84% (26)
- B6% (2)
- C6% (2)
- E3% (1)
Explanation
To achieve ISP redundancy when one ISP link goes down, you need two complementary features: SLA Monitor (D) uses ICMP probes (IP SLA) to continuously test reachability through each ISP by pinging a target IP address. Route Tracking (A) ties a static default route to the result of an SLA Monitor probe - if the probe fails, the tracked route is automatically removed from the routing table, causing traffic to fail over to the other ISP's route. Together they form the detect-and-react mechanism. Redundant interfaces (B) and EtherChannel (C) address link redundancy, not ISP path redundancy. BGP (E) could work but is complex and not required here.
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