350-601 · Question #676
350-601 Question #676: Real Exam Question with Answer & Explanation
The correct answer is B: delay restore interface-vlan 180. The issue described involves intermittent traffic loss when Leaf102 rejoins the vPC during an upgrade. This happens because SVIs (interface VLANs) can come up before the vPC peer-link is fully established, leading to black-holing of traffic. The correct solution is to delay the r
Question
Refer to the exhibit. An engineer implements a VXLAN pod deployment with the vPC. During an upgrade of switches in POD1, Leaf102 starts to rejoin the vPC pair. Also, traffic to and from the Web Cluster becomes intermittent for five minutes. Which additional command must be applied on both switches to resolve this issue?
Options
- Adual-active exclude interface-vlan 180
- Bdelay restore interface-vlan 180
- Cdelay restore orphan-port 180
- Dauto-recovery reload-delay 180
Explanation
The issue described involves intermittent traffic loss when Leaf102 rejoins the vPC during an upgrade. This happens because SVIs (interface VLANs) can come up before the vPC peer-link is fully established, leading to black-holing of traffic. The correct solution is to delay the restoration of SVIs until the vPC peer-link is stable. The command delay restore interface-vlan <VLAN-ID> ensures the SVI (e.g., VLAN 180) remains down during the peer reconvergence period, preventing premature routing or switching decisions that cause traffic drops. dual-active exclude interface-vlan is used in dual-active detection but doesn't solve delay restore orphan-port applies to orphan ports, not SVIs. auto-recovery reload-delay is for recovery after a reload without peer-link, unrelated to SVI restore timing.
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