H12-891_V1.0 Exam Dumps : HCIE-Datacom V1.0

Before performing a network cutover (migration or upgrade), it is essential to collect baseline data to ensure that services operate normally before and after the change.

Importance of Pre-Cutover Information Collection:

Identifies Network Baseline – Helps compare pre-cutover and post-cutover performance.

Detects Hidden Issues – Ensures that no existing network issues interfere with the cutover process.

Prevents Service Interruptions – Ensures all dependent services are accounted for.

Provides Rollback Plan – If issues arise, administrators can restore previous configurations.

Reference from Huawei HCIE-Datacom Documentation:

Huawei Network Change Management Guide – Pre-Cutover & Post-Cutover Best Practices

HCIE-Datacom Training Material – Service Assurance & Risk Analysis

The Protocol Trace function of iMaster NCE-CampusInsight allows O & M teams to analyze the full packet exchange process (e.g., DHCP, authentication, IP acquisition) between clients and the network. In this scenario, it helped pinpoint DHCP address pool exhaustion as the cause.

Exact Extract - Huawei iMaster NCE-CampusInsight Product Documentation:

“The Protocol Trace function visualizes packet-level interaction processes for DHCP, ARP, 802.1X, and others, allowing fast identification of root causes for network access issues.”

In MPLS (Multiprotocol Label Switching), Label Switching Routers (LSRs) handle packets based on FECs (Forwarding Equivalence Classes) and their positions in the label-switched path:

Ingress LSR: The entry point for labeled packets; it classifies packets into FECs and assigns the initial label.

Transit LSR: Intermediate routers that swap labels and forward packets along the LSP.

Egress LSR: The last router in the LSP that removes the label and forwards the packet normally.

An LSR cannot be both an ingress and a transit router for the same FEC, because an ingress LSR is defined as the starting point for that specific FEC ' s LSP. If it’s the ingress, it means the labeled path starts there, so it can ' t be in the middle (transit) of that same path.

Therefore, the statement is FALSE.