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Question 320
Both peers unexpectedly report master for one VLAN. What should be examined?
- Consistent virtual router ID
- Redundant physical access uplinks
- VRRP role and advertisement verification
- Priority and active-router election
Explanation
Correct Answer
C:VRRP advertisements and interface state explain dual-master conditions. Operational output reveals master/backup state and advertisement health.
Incorrect Answers
A:Peers serving one virtual gateway must use compatible VRID and subnet settings. But this does not address the case requirement to validate active and standby gateway status.
B:Gateway redundancy is not useful if access switches lack a path to the surviving peer. But this does not address the case requirement to validate active and standby gateway status.
D:VRRP priority and tracking influence which eligible peer becomes primary. But this does not address the case requirement to validate active and standby gateway status.
Question 321
Access switches have uplinks only to the failed VRRP master; the backup router is fine but unreachable. What topology requirement was missing?
- VRRP role and advertisement verification
- Consistent virtual router ID
- Redundant physical access uplinks
- Tracking of uplink reachability
Explanation
Correct Answer
C:Layer 2 access must reach the surviving gateway. Gateway redundancy is not useful if access switches lack a path to the surviving peer.
Incorrect Answers
A:Operational output reveals master/backup state and advertisement health. But this does not address the case requirement to provide a physical path to both gateway candidates.
B:Peers serving one virtual gateway must use compatible VRID and subnet settings. But this does not address the case requirement to provide a physical path to both gateway candidates.
D:Tracking upstream failure helps avoid retaining an active gateway with no usable exit. But this does not address the case requirement to provide a physical path to both gateway candidates.
Question 322
A VRRP backup assumes master because it has higher priority after a configured change. Which election parameter caused this?
- VRRP role and advertisement verification
- Consistent virtual router ID
- Priority and active-router election
- Tracking of uplink reachability
Explanation
Correct Answer
C:Relative VRRP priority controls preferred role. VRRP priority and tracking influence which eligible peer becomes primary.
Incorrect Answers
A:Operational output reveals master/backup state and advertisement health. But this does not address the case requirement to verify active gateway selection.
B:Peers serving one virtual gateway must use compatible VRID and subnet settings. But this does not address the case requirement to verify active gateway selection.
D:Tracking upstream failure helps avoid retaining an active gateway with no usable exit. But this does not address the case requirement to verify active gateway selection.
Question 323
A failed upstream route is not reflected in VRRP priority; clients still send traffic to a dead end. What should change?
- VRRP role and advertisement verification
- Tracking of uplink reachability
- Virtual IP gateway for clients
- Redundant physical access uplinks
Explanation
Correct Answer
B:Track relevant route or uplink health for appropriate role selection. Tracking upstream failure helps avoid retaining an active gateway with no usable exit.
Incorrect Answers
A:Operational output reveals master/backup state and advertisement health. But this does not address the case requirement to withdraw an unusable gateway from active service.
C:VRRP peers offer a common virtual gateway address that endpoints can keep across supported failovers. But this does not address the case requirement to withdraw an unusable gateway from active service.
D:Gateway redundancy is not useful if access switches lack a path to the surviving peer. But this does not address the case requirement to withdraw an unusable gateway from active service.
Question 324
A branch loses gateway connectivity and two VRRP peers disagree on active status. What protocol output should be inspected?
- Redundant physical access uplinks
- Consistent virtual router ID
- VRRP role and advertisement verification
- Virtual IP gateway for clients
Explanation
Correct Answer
C:VRRP role and advertisement evidence reveal election health. Operational output reveals master/backup state and advertisement health.
Incorrect Answers
A:Gateway redundancy is not useful if access switches lack a path to the surviving peer. But this does not address the case requirement to diagnose first-hop redundancy state.
B:Peers serving one virtual gateway must use compatible VRID and subnet settings. But this does not address the case requirement to diagnose first-hop redundancy state.
D:VRRP peers offer a common virtual gateway address that endpoints can keep across supported failovers. But this does not address the case requirement to diagnose first-hop redundancy state.
Question 325
A datacenter leaf must establish an external route exchange with a configured AS neighbor. Which protocol relationship fits?
- BGP peer ASN and neighbor configuration
- EVPN-VXLAN control/overlay separation
- Redundant BGP transport design
- Underlay IP reachability prerequisite
Explanation
Correct Answer
A:BGP uses explicit neighbor and ASN configuration. BGP establishes a policy-controlled routing session between configured neighbors and autonomous systems.
Incorrect Answers
B:EVPN can advertise overlay endpoint information while VXLAN carries tenant segments over an IP underlay. But this does not address the case requirement to form a policy-governed external routing session.
C:Multiple neighbors or paths improve convergence if designed with independent failure domains. But this does not address the case requirement to form a policy-governed external routing session.
D:Overlay endpoints require working routed connectivity between participating devices. But this does not address the case requirement to form a policy-governed external routing session.
Question 326
An edge switch receives an unwanted default route from a partner. What control should be applied?
- Prefix-list and route-map filtering
- Redundant BGP transport design
- BGP peer ASN and neighbor configuration
- BGP session and received-route verification
Explanation
Correct Answer
A:Prefix-based BGP policy filters disallowed routes. BGP route policies selectively accept, reject or modify route advertisements.
Incorrect Answers
B:Multiple neighbors or paths improve convergence if designed with independent failure domains. But this does not address the case requirement to limit learned or advertised route prefixes.
C:BGP establishes a policy-controlled routing session between configured neighbors and autonomous systems. But this does not address the case requirement to limit learned or advertised route prefixes.
D:Neighbor session and policy output reveal whether intended prefixes were accepted. But this does not address the case requirement to limit learned or advertised route prefixes.
Question 327
A fabric must extend tenant L2 segments across a routed underlay with an EVPN control plane. Which architecture fits?
- Redundant BGP transport design
- BGP peer ASN and neighbor configuration
- EVPN-VXLAN control/overlay separation
- Prefix-list and route-map filtering
Explanation
Correct Answer
C:EVPN signals endpoints and VXLAN transports overlay segments. EVPN can advertise overlay endpoint information while VXLAN carries tenant segments over an IP underlay.
Incorrect Answers
A:Multiple neighbors or paths improve convergence if designed with independent failure domains. But this does not address the case requirement to carry segmented tenants over IP forwarding.
B:BGP establishes a policy-controlled routing session between configured neighbors and autonomous systems. But this does not address the case requirement to carry segmented tenants over IP forwarding.
D:BGP route policies selectively accept, reject or modify route advertisements. But this does not address the case requirement to carry segmented tenants over IP forwarding.
Question 328
EVPN control sessions are configured but VXLAN tunnel endpoints cannot ping each other. What prerequisite should be fixed?
- Prefix-list and route-map filtering
- Underlay IP reachability prerequisite
- BGP session and received-route verification
- EVPN-VXLAN control/overlay separation
Explanation
Correct Answer
B:The underlying routed fabric must reach each tunnel endpoint. Overlay endpoints require working routed connectivity between participating devices.
Incorrect Answers
A:BGP route policies selectively accept, reject or modify route advertisements. But this does not address the case requirement to establish underlay transport before overlay forwarding.
C:Neighbor session and policy output reveal whether intended prefixes were accepted. But this does not address the case requirement to establish underlay transport before overlay forwarding.
D:EVPN can advertise overlay endpoint information while VXLAN carries tenant segments over an IP underlay. But this does not address the case requirement to establish underlay transport before overlay forwarding.
Question 329
One BGP WAN peer fails and the company requires a second independent route. Which topology choice matters?
- Redundant BGP transport design
- BGP session and received-route verification
- EVPN-VXLAN control/overlay separation
- Underlay IP reachability prerequisite
Explanation
Correct Answer
A:Resilient BGP uses multiple reachable paths. Multiple neighbors or paths improve convergence if designed with independent failure domains.
Incorrect Answers
B:Neighbor session and policy output reveal whether intended prefixes were accepted. But this does not address the case requirement to survive failure of a single routing peer.
C:EVPN can advertise overlay endpoint information while VXLAN carries tenant segments over an IP underlay. But this does not address the case requirement to survive failure of a single routing peer.
D:Overlay endpoints require working routed connectivity between participating devices. But this does not address the case requirement to survive failure of a single routing peer.
Question 330
A BGP neighbor is established but its expected prefix is absent. Which inspection is most useful?
- Redundant BGP transport design
- BGP session and received-route verification
- Underlay IP reachability prerequisite
- Prefix-list and route-map filtering
Explanation
Correct Answer
B:Session and received-route policy evidence isolates filtering. Neighbor session and policy output reveal whether intended prefixes were accepted.
Incorrect Answers
A:Multiple neighbors or paths improve convergence if designed with independent failure domains. But this does not address the case requirement to verify whether BGP learned and installed a route.
C:Overlay endpoints require working routed connectivity between participating devices. But this does not address the case requirement to verify whether BGP learned and installed a route.
D:BGP route policies selectively accept, reject or modify route advertisements. But this does not address the case requirement to verify whether BGP learned and installed a route.
HPE Network Switching Professional (HPE7-A08) Practice Tests