Ace Your HPE7-A01 HP Certification Exam

These are the correct statements regarding the ERSPAN session that needs to be established on an AOS-CX switch for a network administrator to examine the packets over a period of time from their desktop. ERSPAN (Encapsulated Remote Switched Port Analyzer) is a feature that allows an AOS-CX switch to mirror traffic from one or more source ports or VLANs to a remote destination IP address over a GRE (Generic Routing Encapsulation) tunnel. The destination IP address must be the IP address of the administrator’s desktop, which must have a packet capture tool installed to receive and analyze the mirrored traffic. The encapsulation protocol used for ERSPAN is GRE, which adds a header to the mirrored packets with information such as source and destination IP addresses, session ID, etc. The other statements are incorrect because they either do not specify the correct destination IP address or do not use ERSPAN or GRE. References:

a) A device with IP address 10.1.3.7 in a network wants to send the traffic stream to a device with IP address 10.13.4.2 in the other network - >  Unicast 

b) One/more senders and one/more recipients participate in data transfer traffic - >  Multicast 

c) Sent to all hosts on a remote network - >  IP Directed Broadcast 

d) Sent to all NICs on the same network segment as the source NIC - >  Broadcast

In MSTP, root-bridge priority is configured per MST instance , not directly per individual VLAN. Since Core-1 already has spanning-tree instance 1 priority 0, Core-1 is intended to become the preferred root for MST instance 1 . To make VLAN 10 use that spanning-tree topology, VLAN 10 must therefore be mapped into instance 1 with:

spanning-tree instance 1 vlan 10

HPE Aruba Networking documents this exact syntax and states that the command either creates an MST instance with the specified VLAN mapping or maps a VLAN to an existing instance. Aruba Networks

This is how MSTP provides VLAN load balancing. Different VLANs can be assigned to separate MST instances, and each instance can have a different root bridge. For example, VLAN 10 can belong to instance 1 with Core-1 as root, while VLAN 20 can belong to another instance whose root priority favors Core-2 . Aruba specifically describes this ability to forward different VLAN groups along separate paths as an MSTP load-sharing mechanism. Aruba Networks

Options B, C, and D are not the appropriate AOS-CX MSTP VLAN-to-instance mapping syntax. The required command is therefore A .

Study Guide Topics: MSTP, MST Instances, VLAN-to-Instance Mapping, Root Bridge Priority, VLAN Load Balancing, AOS-CX Spanning Tree.

The default value for config-revision on Core-1 is 0. Config-revision is a parameter that indicates the configuration version of a VSX pair. It is used to synchronize the configuration between the VSX peers and to detect any configuration mismatch. The config-revision value is set to 0 by default on both VSX peers and is incremented by 1 every time a configuration change is made on either peer. The other options are incorrect because they do not reflect the default value of config-revision. References: