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A10-System-Administration A10 Networks A10 Certified Professional System Administration 4

  • A10 Networks
  • 5 free sample questions

About this exam

A10-System-Administration is the A10 Networks exam A10 Networks A10 Certified Professional System Administration 4. Paid practice material for this exam is not available yet, but you can try its free sample questions.

Exam code
A10-System-Administration
Vendor
A10 Networks
Practice questions
Not available yet
Free sample questions
5
Question bank last updated
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Taken from the free sample set for A10-System-Administration.

Question 1

Which statement describes the effect this command: erase preserve-management

  1. Option A:
    The startup-config file is erased and the ACOS is immediately rebooted
  2. Option B:
    All configuration profiles, SSL certificates, aFlex polices, black/white lists, and system logs are erased the next time the system reboots
  3. Option C:
    The startup-config file is erased but the management interface ip configuration is kept
  4. Option D:
    The start-up config file is erased but the all of the admin accounts are preserved
Show answer and explanation

Correct answer: C

Here is the breakdown of why C is the correct answer:
Explanation of the Command
In A10 Networks' Advanced Core Operating System (ACOS), the erase command is used to clear out the device's custom configuration and restore it to its factory default state.
However, running a raw erase command will wipe out everything, including the network configurations you rely on to manage the box remotely. If you are connected via SSH or a web GUI and wipe the management IP, you will immediately lose your connection and will have to hook up a physical console cable to get back in.
To prevent this administrative headache, ACOS includes the preserve-management parameter:
What it erases: The custom startup-config file (which holds all your Service Load Balancing (SLB) configurations, partitions, virtual servers, etc.).
What it keeps: The IP address, subnet mask, and default gateway specifically configured on the management (MGMT) interface.
Why the other options are incorrect:
A is incorrect because the command alone does not immediately reboot the device. In ACOS, you typically have to append reload or issue a separate reload command to reboot the system.
B is incorrect because it describes a much more catastrophic data wipe across the board, completely unrelated to the management preservation feature.
D is incorrect because preserving admin accounts is handled by a completely different parameter: erase preserve-accounts.
Summary Takeaway
Using erase preserve-management allows you to wipe a system clean to start a new configuration from scratch without locking yourself out of your remote management session.

Question 2

When vBlade A issues a “vcs vmaster-take-over 200” command, which statement is true?

  1. Option A:
    The command is ignored when the current vMaster is in vMaster maintenance mode.
  2. Option B:
    Any subsequent vmaster-take-over command within the chassis with a parameter smaller than 201 is ignored.
  3. Option C:
    The 200 priority is compared to the current vmaster’s default vrid priority to determine which device controls the chassis.
  4. Option D:
    If an administrator on vBlade B were to simultaneously issue command vcs vmaster-take-over 210, vBlade B would become the vMaster.
Show answer and explanation

Correct answer: C

The correct answer is indeed C. Here is the detailed explanation of how this works within A10 Networks' ACOS Virtual Chassis System (aVCS) and VRRP-A:
What vcs vmaster-take-over Does
In an aVCS setup, multiple A10 appliances are clustered together into a single virtual chassis. One device operates as the management brain (the vMaster), while the others behave as line cards/nodes (the vBlades).
The vcs vmaster-take-over <priority> command is an operational command used on a vBlade to forcefully initiate a failover and assume control of the virtual chassis management plane.
Why C is the Correct Statement
When you specify a priority number (in this case, 200) using the take-over command:
The system evaluates this temporary forced priority value against the current running priorities within the system.
Crucially, aVCS coordinates directly with VRRP-A (the data plane high-availability protocol). The injected take-over priority value is compared to the current vMaster’s default or configured Virtual Router ID (VRID) priority level to calculate whether a transition of chassis control should take place.
Why the Other Options are Incorrect
A is incorrect: If the current vMaster is placed in vMaster maintenance mode, it explicitly drops its priority down to 0 precisely to yield mastership to another device. The take-over command would easily succeed, not be ignored.
B is incorrect: The parameter used in a forced take-over doesn't lock or block subsequent commands with lower thresholds from being executed later. Each command is evaluated against the system's runtime priority mechanics at the moment it is run.
D is incorrect: If two administrators execute forced take-over commands on different blades simultaneously, the system evaluates the values against the active master context based on timestamps and processing order. It does not blindly auto-assign mastership to vBlade B solely because 210 > 200 without evaluating the active vMaster's status.
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