Refer to the exhibit. An engineer discovers that if the vPC peer link goes down, half of the devices in VLAN 20 experience connectivity issues with the external networks Which action resolves the…

Question

Exhibits

Options

• AConfigure a dedicated Layer 3 link between vPC peers
• BAllow non-vPC VLANs on a second trunk between the two vPC peers
• CAdd the non-vPC SVIs in the dual-active exclude VLAN list
• DExclude the non-vPC VLANs from vPC peer link

• A
  3% (2)
• B
  7% (4)
• C
  76% (44)
• D
  14% (8)

Explanation

Option C is correct because when the vPC peer link fails, the secondary vPC peer suspends its vPC member ports and-by default-also brings down its SVIs, cutting off Layer 3 routing for any hosts on that switch. Adding the non-vPC SVIs (e.g., the VLAN 20 SVI) to the vpc dual-active exclude interface-vlan list prevents those SVIs from being shut down, so hosts on the secondary peer can still reach external networks through their local gateway.

Why the distractors are wrong:

• A - A dedicated L3 link between peers addresses routing protocol peering, not the SVI suspension that causes the outage; it doesn't fix the root cause.
• B - Adding non-vPC VLANs to a second trunk between peers creates a loop risk and doesn't prevent the secondary switch's SVIs from going down.
• D - Removing non-vPC VLANs from the peer link would actually make the problem worse by reducing the peer link's ability to carry transit traffic for those VLANs.

Memory tip: Think "Exclude to Survive" - VLANs on the dual-active exclude list have their SVIs excluded from being shut down, keeping the gateway alive on both peers even when the peer link drops.

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