Question 630 A subnet is configured for DHCPv6, yet hosts only autoconfigure SLAAC addresses because router advertisements do not indicate the intended managed-address mode. Which technical mechanism best explains the behavior observed in this scenario? IOS DHCP pools can dynamically lease any available address in scope unless excluded or reserved. IPv6 hosts interpret RA M/O indicators when deciding to use DHCPv6 for address or other configuration in applicable environments. DHCP relay converts local broadcast requests to routed server communication, which still needs bidirectional policy reachability. IPv4 DHCP broadcast discovery does not normally cross routers without a relay agent. ExplanationCorrect Answer B:IPv6 hosts interpret RA M/O indicators when deciding to use DHCPv6 for address or other configuration in applicable environments. This explains why the initial condition produces the observed failure. The direct repair is: Adjust the RA managed/other-config signaling to match the approved address-assignment design. Validate through: Inspect received RA flags and the resulting client DHCPv6 transaction in the target host platform. Other Answers A:IOS DHCP pools can dynamically lease any available address in scope unless excluded or reserved. IPv6 hosts interpret RA M/O indicators when deciding to use DHCPv6 for address or other configuration in applicable environments. C:DHCP relay converts local broadcast requests to routed server communication, which still needs bidirectional policy reachability. IPv6 hosts interpret RA M/O indicators when deciding to use DHCPv6 for address or other configuration in applicable environments. D:IPv4 DHCP broadcast discovery does not normally cross routers without a relay agent. IPv6 hosts interpret RA M/O indicators when deciding to use DHCPv6 for address or other configuration in applicable environments.
Question 631 A subnet is configured for DHCPv6, yet hosts only autoconfigure SLAAC addresses because router advertisements do not indicate the intended managed-address mode. After applying the correction, which verification evidence most directly demonstrates that this issue is resolved? Renew a lease and inspect offered router/DNS options and actual off-subnet reachability. Capture `giaddr` and confirm the central server selects the intended scope and options. Inspect received RA flags and the resulting client DHCPv6 transaction in the target host platform. Review new leases and conflict logs to show printers remain stable and clients get unreserved addresses. ExplanationCorrect Answer C:Inspect received RA flags and the resulting client DHCPv6 transaction in the target host platform. This checks the affected traffic or control-plane behavior, not merely a generic up/down indicator. The underlying mechanism is: IPv6 hosts interpret RA M/O indicators when deciding to use DHCPv6 for address or other configuration in applicable environments. Other Answers A:Renew a lease and inspect offered router/DNS options and actual off-subnet reachability. IPv6 hosts interpret RA M/O indicators when deciding to use DHCPv6 for address or other configuration in applicable environments. B:Capture `giaddr` and confirm the central server selects the intended scope and options. IPv6 hosts interpret RA M/O indicators when deciding to use DHCPv6 for address or other configuration in applicable environments. D:Review new leases and conflict logs to show printers remain stable and clients get unreserved addresses. IPv6 hosts interpret RA M/O indicators when deciding to use DHCPv6 for address or other configuration in applicable environments.
Question 632 A subnet is configured for DHCPv6, yet hosts only autoconfigure SLAAC addresses because router advertisements do not indicate the intended managed-address mode. Which lasting design or operational safeguard best prevents this particular issue from recurring? Keep a synchronized address-reservation inventory and DHCP exclusion policy. Pair DHCP relay configuration with firewall-path validation in remote-site templates. Monitor DHCP conflicts and enforce centralized IP address ownership. Document SLAAC-versus-DHCPv6 behavior by OS and validate RA settings after VLAN changes. ExplanationCorrect Answer D:Document SLAAC-versus-DHCPv6 behavior by OS and validate RA settings after VLAN changes. This addresses the recurring cause: IPv6 hosts interpret RA M/O indicators when deciding to use DHCPv6 for address or other configuration in applicable environments. A targeted acceptance check is: Inspect received RA flags and the resulting client DHCPv6 transaction in the target host platform. Other Answers A:Keep a synchronized address-reservation inventory and DHCP exclusion policy. IPv6 hosts interpret RA M/O indicators when deciding to use DHCPv6 for address or other configuration in applicable environments. B:Pair DHCP relay configuration with firewall-path validation in remote-site templates. IPv6 hosts interpret RA M/O indicators when deciding to use DHCPv6 for address or other configuration in applicable environments. C:Monitor DHCP conflicts and enforce centralized IP address ownership. IPv6 hosts interpret RA M/O indicators when deciding to use DHCPv6 for address or other configuration in applicable environments.
Question 633 A DHCP relay sends requests with a wrong `giaddr` after an interface move, so the central server chooses the incorrect subnet pool. Which corrective action most directly resolves the documented failure without suppressing unrelated safeguards? Correct relay source/interface design and verify the gateway address used for pool selection. Configure the platform-supported DHCPv6 relay destination and applicable interface behavior. Correct the subnet-specific DHCP default-router option in the affected pool. Change only the DHCP scope’s default-router option while leaving the relay gateway address unchanged. ExplanationCorrect Answer A:Correct relay source/interface design and verify the gateway address used for pool selection. A DHCPv4 relay's gateway address identifies the client subnet to the server in ordinary relay operation. Capture `giaddr` and confirm the central server selects the intended scope and options. Other Answers B:Configure the platform-supported DHCPv6 relay destination and applicable interface behavior. A DHCPv4 relay's gateway address identifies the client subnet to the server in ordinary relay operation. C:Correct the subnet-specific DHCP default-router option in the affected pool. A DHCPv4 relay's gateway address identifies the client subnet to the server in ordinary relay operation. D:DHCP scope option changes do not correct an incorrect relay giaddr used by the server to select the pool. Repair the relay source/interface and verify server pool selection.
Question 634 A DHCP relay sends requests with a wrong `giaddr` after an interface move, so the central server chooses the incorrect subnet pool. Which technical mechanism best explains the behavior observed in this scenario? DHCP decline or conflict handling indicates offered addresses may already be in use, not simply insufficient pool size. A DHCPv4 relay's gateway address identifies the client subnet to the server in ordinary relay operation. IPv6 hosts interpret RA M/O indicators when deciding to use DHCPv6 for address or other configuration in applicable environments. DHCPv6 client-server messages require an IPv6 relay across routed segments when no local server is present. ExplanationCorrect Answer B:A DHCPv4 relay's gateway address identifies the client subnet to the server in ordinary relay operation. This explains why the initial condition produces the observed failure. The direct repair is: Correct relay source/interface design and verify the gateway address used for pool selection. Validate through: Capture `giaddr` and confirm the central server selects the intended scope and options. Other Answers A:DHCP decline or conflict handling indicates offered addresses may already be in use, not simply insufficient pool size. A DHCPv4 relay's gateway address identifies the client subnet to the server in ordinary relay operation. C:IPv6 hosts interpret RA M/O indicators when deciding to use DHCPv6 for address or other configuration in applicable environments. A DHCPv4 relay's gateway address identifies the client subnet to the server in ordinary relay operation. D:DHCPv6 client-server messages require an IPv6 relay across routed segments when no local server is present. A DHCPv4 relay's gateway address identifies the client subnet to the server in ordinary relay operation.
Question 635 A DHCP relay sends requests with a wrong `giaddr` after an interface move, so the central server chooses the incorrect subnet pool. After applying the correction, which verification evidence most directly demonstrates that this issue is resolved? Inspect received RA flags and the resulting client DHCPv6 transaction in the target host platform. Resolve duplicate use and confirm clean offers, ACKs and absence of further conflict events. Capture `giaddr` and confirm the central server selects the intended scope and options. Observe the DHCPv6 relay-forward and relay-reply exchange and a valid client configuration. ExplanationCorrect Answer C:Capture `giaddr` and confirm the central server selects the intended scope and options. This checks the affected traffic or control-plane behavior, not merely a generic up/down indicator. The underlying mechanism is: A DHCPv4 relay's gateway address identifies the client subnet to the server in ordinary relay operation. Other Answers A:Inspect received RA flags and the resulting client DHCPv6 transaction in the target host platform. A DHCPv4 relay's gateway address identifies the client subnet to the server in ordinary relay operation. B:Resolve duplicate use and confirm clean offers, ACKs and absence of further conflict events. A DHCPv4 relay's gateway address identifies the client subnet to the server in ordinary relay operation. D:Observe the DHCPv6 relay-forward and relay-reply exchange and a valid client configuration. A DHCPv4 relay's gateway address identifies the client subnet to the server in ordinary relay operation.
Question 636 A DHCP relay sends requests with a wrong `giaddr` after an interface move, so the central server chooses the incorrect subnet pool. Which lasting design or operational safeguard best prevents this particular issue from recurring? Document SLAAC-versus-DHCPv6 behavior by OS and validate RA settings after VLAN changes. Test RA flags and DHCPv6 relay together when deploying stateful IPv6 addressing. Keep a synchronized address-reservation inventory and DHCP exclusion policy. Validate relay gateway identity whenever routed client interfaces migrate. ExplanationCorrect Answer D:Validate relay gateway identity whenever routed client interfaces migrate. This addresses the recurring cause: A DHCPv4 relay's gateway address identifies the client subnet to the server in ordinary relay operation. A targeted acceptance check is: Capture `giaddr` and confirm the central server selects the intended scope and options. Other Answers A:Document SLAAC-versus-DHCPv6 behavior by OS and validate RA settings after VLAN changes. A DHCPv4 relay's gateway address identifies the client subnet to the server in ordinary relay operation. B:Test RA flags and DHCPv6 relay together when deploying stateful IPv6 addressing. A DHCPv4 relay's gateway address identifies the client subnet to the server in ordinary relay operation. C:Keep a synchronized address-reservation inventory and DHCP exclusion policy. A DHCPv4 relay's gateway address identifies the client subnet to the server in ordinary relay operation.
Question 637 A server distributes correct IPv4 leases but a client repeatedly declines them after detecting another host already using the offered address. Which corrective action most directly resolves the documented failure without suppressing unrelated safeguards? Investigate conflicting static assignments and address-conflict detection before expanding the pool. Trace and permit the approved DHCP relay client/server UDP exchange through the actual security path. Adjust the RA managed/other-config signaling to match the approved address-assignment design. Correct relay source/interface design and verify the gateway address used for pool selection. ExplanationCorrect Answer A:Investigate conflicting static assignments and address-conflict detection before expanding the pool. DHCP decline or conflict handling indicates offered addresses may already be in use, not simply insufficient pool size. Resolve duplicate use and confirm clean offers, ACKs and absence of further conflict events. Other Answers B:Trace and permit the approved DHCP relay client/server UDP exchange through the actual security path. DHCP decline or conflict handling indicates offered addresses may already be in use, not simply insufficient pool size. C:Adjust the RA managed/other-config signaling to match the approved address-assignment design. DHCP decline or conflict handling indicates offered addresses may already be in use, not simply insufficient pool size. D:Correct relay source/interface design and verify the gateway address used for pool selection. DHCP decline or conflict handling indicates offered addresses may already be in use, not simply insufficient pool size.
Question 638 A server distributes correct IPv4 leases but a client repeatedly declines them after detecting another host already using the offered address. Which technical mechanism best explains the behavior observed in this scenario? IOS DHCP pools can dynamically lease any available address in scope unless excluded or reserved. DHCP decline or conflict handling indicates offered addresses may already be in use, not simply insufficient pool size. IPv6 hosts interpret RA M/O indicators when deciding to use DHCPv6 for address or other configuration in applicable environments. A DHCPv4 relay's gateway address identifies the client subnet to the server in ordinary relay operation. ExplanationCorrect Answer B:DHCP decline or conflict handling indicates offered addresses may already be in use, not simply insufficient pool size. This explains why the initial condition produces the observed failure. The direct repair is: Investigate conflicting static assignments and address-conflict detection before expanding the pool. Validate through: Resolve duplicate use and confirm clean offers, ACKs and absence of further conflict events. Other Answers A:IOS DHCP pools can dynamically lease any available address in scope unless excluded or reserved. DHCP decline or conflict handling indicates offered addresses may already be in use, not simply insufficient pool size. C:IPv6 hosts interpret RA M/O indicators when deciding to use DHCPv6 for address or other configuration in applicable environments. DHCP decline or conflict handling indicates offered addresses may already be in use, not simply insufficient pool size. D:A DHCPv4 relay's gateway address identifies the client subnet to the server in ordinary relay operation. DHCP decline or conflict handling indicates offered addresses may already be in use, not simply insufficient pool size.
Question 639 A server distributes correct IPv4 leases but a client repeatedly declines them after detecting another host already using the offered address. After applying the correction, which verification evidence most directly demonstrates that this issue is resolved? Renew a client lease and verify a relayed discover/offer exchange and correct gateway option. Capture discover/offer/ack across relay and ACL counters with an authorized test client. Resolve duplicate use and confirm clean offers, ACKs and absence of further conflict events. Renew a lease and inspect offered router/DNS options and actual off-subnet reachability. ExplanationCorrect Answer C:Resolve duplicate use and confirm clean offers, ACKs and absence of further conflict events. This checks the affected traffic or control-plane behavior, not merely a generic up/down indicator. The underlying mechanism is: DHCP decline or conflict handling indicates offered addresses may already be in use, not simply insufficient pool size. Other Answers A:Renew a client lease and verify a relayed discover/offer exchange and correct gateway option. DHCP decline or conflict handling indicates offered addresses may already be in use, not simply insufficient pool size. B:Capture discover/offer/ack across relay and ACL counters with an authorized test client. DHCP decline or conflict handling indicates offered addresses may already be in use, not simply insufficient pool size. D:Renew a lease and inspect offered router/DNS options and actual off-subnet reachability. DHCP decline or conflict handling indicates offered addresses may already be in use, not simply insufficient pool size.
Question 640 A server distributes correct IPv4 leases but a client repeatedly declines them after detecting another host already using the offered address. Which lasting design or operational safeguard best prevents this particular issue from recurring? Pair DHCP relay configuration with firewall-path validation in remote-site templates. Test RA flags and DHCPv6 relay together when deploying stateful IPv6 addressing. Include relay address and interface inventory in VLAN turn-up checklists. Monitor DHCP conflicts and enforce centralized IP address ownership. ExplanationCorrect Answer D:Monitor DHCP conflicts and enforce centralized IP address ownership. This addresses the recurring cause: DHCP decline or conflict handling indicates offered addresses may already be in use, not simply insufficient pool size. A targeted acceptance check is: Resolve duplicate use and confirm clean offers, ACKs and absence of further conflict events. Other Answers A:Pair DHCP relay configuration with firewall-path validation in remote-site templates. DHCP decline or conflict handling indicates offered addresses may already be in use, not simply insufficient pool size. B:Test RA flags and DHCPv6 relay together when deploying stateful IPv6 addressing. DHCP decline or conflict handling indicates offered addresses may already be in use, not simply insufficient pool size. C:Include relay address and interface inventory in VLAN turn-up checklists. DHCP decline or conflict handling indicates offered addresses may already be in use, not simply insufficient pool size.
