Pass Your Cisco 350-401 Exam Easy!

That diagnosis is supported by a different symptom: Small packets succeed while full-sized DF TCP segments blackhole. Here the recorded observation is: iKE authentication succeeds but no child security association is installed. The applicable cause is: the peers have no common supported child-SA encryption/integrity proposal.

That diagnosis is supported by a different symptom: A transit observer can inspect inner routed payloads inside GRE packets. Here the recorded observation is: iKE authentication succeeds but no child security association is installed. The applicable cause is: the peers have no common supported child-SA encryption/integrity proposal.

That diagnosis is supported by a different symptom: Tunnel protocol repeatedly flaps with recursive route warnings. Here the recorded observation is: iKE authentication succeeds but no child security association is installed. The applicable cause is: the peers have no common supported child-SA encryption/integrity proposal.

Routing the GRE underlay does not reconcile the conflicting ESP cipher suites preventing IPsec negotiation.

Adding IPsec protection to a GRE transport does not resolve mismatched IKE and ESP proposals between the peers.

That control reduces a separate risk: Encapsulation overhead reduced effective payload MTU without PMTU/MSS accommodation. For the described design, the recurring risk arises from: the peers have no common supported child-SA encryption/integrity proposal. The specific required safeguard is: control crypto policy compatibility and key rotation without enabling weak fallback algorithms.

Ensuring the IP underlay routes between VTEP addresses and accommodates VXLAN encapsulation overhead would not resolve the host EID through the LISP mapping system to its current routing locator (RLOC).

Assigning supported map-server/map-resolver roles to the intended LISP control-plane system would not resolve the host EID through the LISP mapping system to its current routing locator (RLOC).

Using VXLAN encapsulation with a tenant VNI between participating VTEPs would not resolve the host EID through the LISP mapping system to its current routing locator (RLOC).

This test measures a different behavior: Test VTEP IP reachability with an MTU probe before relying on tenant frame forwarding. It does not establish the target outcome. For the documented fault, the direct acceptance test is: inspect EID-to-RLOC mappings and confirm encapsulation targets the registered RLOC.

This test measures a different behavior: Inspect outer UDP/4789 encapsulation and matching VNI on both VTEPs. It does not establish the target outcome. For the documented fault, the direct acceptance test is: inspect EID-to-RLOC mappings and confirm encapsulation targets the registered RLOC.

This test measures a different behavior: Confirm ETR map registrations and ITR map requests are answered for a representative EID prefix. It does not establish the target outcome. For the documented fault, the direct acceptance test is: inspect EID-to-RLOC mappings and confirm encapsulation targets the registered RLOC.

That diagnosis is supported by a different symptom: Overlay traffic fails across racks even though local hosts communicate within each VTEP. Here the recorded observation is: packets for a moved endpoint are sent toward a stale old site location. The applicable cause is: the remote map-cache still references the former EID-to-RLOC association.

That diagnosis is supported by a different symptom: Remote ITRs cannot resolve mappings although the local ETR has learned the endpoint. Here the recorded observation is: packets for a moved endpoint are sent toward a stale old site location. The applicable cause is: the remote map-cache still references the former EID-to-RLOC association.

That diagnosis is supported by a different symptom: Tenant frames reach the remote VTEP but are delivered to another overlay segment. Here the recorded observation is: packets for a moved endpoint are sent toward a stale old site location. The applicable cause is: the remote map-cache still references the former EID-to-RLOC association.

That control reduces a separate risk: The underlay cannot deliver outer IP/UDP VXLAN packets to the remote VTEP. For the described design, the recurring risk arises from: the remote map-cache still references the former EID-to-RLOC association. The specific required safeguard is: monitor map-register refresh and mobility convergence after location changes.

That control reduces a separate risk: The expected map server/resolver is unavailable or lacks the EID registration. For the described design, the recurring risk arises from: the remote map-cache still references the former EID-to-RLOC association. The specific required safeguard is: monitor map-register refresh and mobility convergence after location changes.

That control reduces a separate risk: The VNI mapping is inconsistent with the intended tenant overlay segment. For the described design, the recurring risk arises from: the remote map-cache still references the former EID-to-RLOC association. The specific required safeguard is: monitor map-register refresh and mobility convergence after location changes.

Resolving the host EID through the LISP mapping system to its current routing locator (RLOC) would not assign supported map-server/map-resolver roles to the intended LISP control-plane system.

Building a supported GRE tunnel between reachable tunnel endpoints and routing the intended overlay payload through it would not assign supported map-server/map-resolver roles to the intended LISP control-plane system.

Ensuring the IP underlay routes between VTEP addresses and accommodates VXLAN encapsulation overhead would not assign supported map-server/map-resolver roles to the intended LISP control-plane system.

This test measures a different behavior: Test VTEP IP reachability with an MTU probe before relying on tenant frame forwarding. It does not establish the target outcome. For the documented fault, the direct acceptance test is: confirm ETR map registrations and ITR map requests are answered for a representative EID prefix.

This test measures a different behavior: Inspect tunnel source/destination underlay reachability and encapsulated packet counters. It does not establish the target outcome. For the documented fault, the direct acceptance test is: confirm ETR map registrations and ITR map requests are answered for a representative EID prefix.

This test measures a different behavior: Inspect EID-to-RLOC mappings and confirm encapsulation targets the registered RLOC. It does not establish the target outcome. For the documented fault, the direct acceptance test is: confirm ETR map registrations and ITR map requests are answered for a representative EID prefix.

That diagnosis is supported by a different symptom: Packets for a moved endpoint are sent toward a stale old site location. Here the recorded observation is: remote ITRs cannot resolve mappings although the local ETR has learned the endpoint. The applicable cause is: the expected map server/resolver is unavailable or lacks the EID registration.

That diagnosis is supported by a different symptom: Tunnel interface is up administratively but multicast flows cannot cross because remote GRE endpoint is unreachable. Here the recorded observation is: remote ITRs cannot resolve mappings although the local ETR has learned the endpoint. The applicable cause is: the expected map server/resolver is unavailable or lacks the EID registration.

That diagnosis is supported by a different symptom: Overlay traffic fails across racks even though local hosts communicate within each VTEP. Here the recorded observation is: remote ITRs cannot resolve mappings although the local ETR has learned the endpoint. The applicable cause is: the expected map server/resolver is unavailable or lacks the EID registration.

That control reduces a separate risk: The GRE outer destination lacks routable underlay reachability. For the described design, the recurring risk arises from: the expected map server/resolver is unavailable or lacks the EID registration. The specific required safeguard is: use redundant mapping services and validate resolver reachability across underlay links.

That control reduces a separate risk: The remote map-cache still references the former EID-to-RLOC association. For the described design, the recurring risk arises from: the expected map server/resolver is unavailable or lacks the EID registration. The specific required safeguard is: use redundant mapping services and validate resolver reachability across underlay links.

That control reduces a separate risk: The underlay cannot deliver outer IP/UDP VXLAN packets to the remote VTEP. For the described design, the recurring risk arises from: the expected map server/resolver is unavailable or lacks the EID registration. The specific required safeguard is: use redundant mapping services and validate resolver reachability across underlay links.

Ensuring the IP underlay routes between VTEP addresses and accommodates VXLAN encapsulation overhead would not meet the need for vXLAN encapsulation with a tenant VNI between participating VTEPs.

Building a supported GRE tunnel between reachable tunnel endpoints and routing the intended overlay payload through it would not meet the need for vXLAN encapsulation with a tenant VNI between participating VTEPs.

Resolving the host EID through the LISP mapping system to its current routing locator (RLOC) would not meet the need for vXLAN encapsulation with a tenant VNI between participating VTEPs.