Huawei H12-891_V1.0 Exam With Confidence Using Practice Dumps

WRED (Weighted Random Early Detection) helps prevent congestion by randomly discarding packets before buffers are full.

Drop Probability Behavior:

Below lower threshold = 0% drop (packets pass normally).

Between lower & upper threshold = Progressively increasing drop probability.

Above upper threshold = 100% drop (probability = 1).

✅ Reference: Huawei HCIE-Datacom Guide - WRED Mechanism

To automatically enable MPLS on an interface in SR-MPLS:

Segment routing must be enabled globally in the system view → ✅

Segment routing must also be enabled under the IGP process, and IGP (OSPF or IS-IS) must be enabled on the interface → ✅

Clarifications:

SRGB (Segment Routing Global Block) configuration defines SID ranges but does not trigger MPLS enablement → ❌

Static adjacency labels are advanced options and do not auto-enable MPLS → ❌

Correct answers: B, D

The command output shows:

* > i before both networks, which means these routes are the preferred routes (*) and are learned via internal BGP (i).

Two networks are listed: 3002::3 and 3002::4, which means R1 does have these two routes in its BGP IPv6 routing table.

For 3002::4, the path origin shows 65001 i, which means this route originated from AS 65001 and was learned through IBGP.

The AS Path attribute is only shown for 3002::4, but both routes are clearly present.

Therefore, the correct conclusion is:

D. R1 has routes 3002::3/128 and 3002::4/128.