HPE7-A07 Practice Questions

Graceful Restart (GR) allows a router to continue forwarding packets while it restarts its OSPF

process. The GR helper role on AOS-CX switches supports routers during this process. OSPF routers

listen for Grace-LSAs to identify neighbors undergoing a graceful restart, maintaining adjacencies

with those routers to allow uninterrupted forwarding.

In BGP, the route marked with a ">" symbol is the best route that is chosen based on BGP attributes

in the following order: highest weight (Cisco-specific), highest local preference, originated by BGP

running on the local router, shortest AS path, lowest origin type, lowest MED, eBGP over iBGP,

closest IGP neighbor, and lowest BGP router ID. Based on the table provided, Option E would be

marked with a ">" symbol as it has the highest local preference of 100 which is a decisive factor in

the BGP best path selection process.

MU-MIMO (Multi-User, Multiple Input, Multiple Output) provides the most efficient use of airtime

for VoIP traffic among the options listed. MU-MIMO allows multiple users to receive multiple data

streams simultaneously, improving the overall efficiency of the network, especially in dense

environments where VoIP applications need consistent and reliable connectivity.

When cluster preemption is not enabled, access points (APs) will not automatically fail back to the

primary gateway cluster once it is up again after having failed over to the secondary. This would

result in an equal split of APs across primary and secondary clusters if both clusters are operational.

Without preemption, there's no automatic rebalancing of APs back to the primary cluster, leading to

the current distribution.

To maximize wired bandwidth utilization, especially when multiple APs are terminating on mobility

gateways, it's best practice to aggregate physical ports into a port channel. This provides redundancy

and increased bandwidth by combining the throughput of multiple ports.

The CLI output provided shows routing information from a CX 6300 switch. The output under "VRF:

default" shows various IP routes, including a route for 10.203.1.100/32 with a next hop of

172.21.11.2. This indicates that the route to the client with IP address 10.203.1.100 is known in the

network and is reachable via another device in the fabric, which has the loopback IP address

172.21.11.2. Since the route is present in the routing table, it means that the client is known and

active within the fabric network.

The issue is that unknown TLVs (Type Length Values) cannot be displayed. LLDP (Link Layer Discovery

Protocol) is used to share device information with network neighbors, but if a TLV is not recognized

by the LLDP implementation on the gateway, it won't be displayed or processed. Hence, the Asset ID

TLV set on the device for inventory management is not showing up because it is unrecognized or

unsupported by the gateway's LLDP.

To ensure that ClearPass can initiate a Change of Authorization (CoA) consistently, it's important to

enable dynamic authorization to allow RADIUS CoA messages to be processed. This setting typically

falls under the high-availability cluster configuration to ensure that it persists across gateway

failovers. Additionally, the NAS IP address must be configured under RADIUS client settings to ensure

that the correct IP address is used for RADIUS communications, which is necessary for CoA to

function correctly.

VoIP quality can be negatively impacted by insufficient cell overlap in AP deployment plans, which

can cause poor handoffs between APs as a user moves around. This results in a degraded VoIP

experience. Additionally, roaming into an area with continuous Zigbee operation can cause

interference with the 5GHz frequency band, further contributing to poor VoIP call quality. The Zigbee

communication protocol operates on the same frequency band as Wi-Fi and can introduce noise and

interference, which leads to a reduced MOS score, as reported by the VoIP engineer.

USB dongles often require additional power, which may exceed the power delivery capabilities of

Class 4 PoE switches. Aruba AP-615 and AP-635 are designed to work with USB dongles that require

additional power for proper operation. Since the Cat 6A cable can support higher power levels,

replacing the Class 4 PoE switches with Class 6 PoE switches, which can deliver higher power, should

resolve the issue with the dongles not powering up.