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Exam 1Y0-230 topic 1 question 1 discussion

Actual exam question from Citrix's 1Y0-230
Question #: 1
Topic #: 1
[All 1Y0-230 Questions]

Scenario: A Citrix Administrator found that whenever a NetScaler VPX high availability (HA) pair of appliances fails over, the load-balanced websites are NOT accessible. The administrator investigated the issue and found that the router and switches do NOT support gratuitous ARP (GARP). However, the administrator cannot immediately afford to upgrade the network infrastructure.
What can the administrator do immediately to resolve the issue and prevent a future outage?

  • A. Migrate the VPX pair to different hypervisor hosts.
  • B. Replace the NetScaler VPX appliances with NetScaler MPX appliances
  • C. Configure a Virtual MAC (VMAC) on the NetScaler.
  • D. Utilize IPv6 instead of IPv4.
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Suggested Answer: D 🗳️
by maurizio_n91 at May 17, 2020, 10:17 a.m.

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maurizio_n91
Highly Voted 4 years, 6 months ago
C is correct
upvoted 6 times
...
thedelph
Most Recent 4 years ago
C is correct: https://www.citrix.com/blogs/2015/01/05/netscaler-best-practice-with-vmac-in-a-high-availability-configuration/ "The NetScaler MAC addresses are not floating by default; just the IP addresses. This may cause issues with an older network switch connected to the NetScaler, or perhaps a firewall (FW) that does not understand GARP. In the event that a switch or FW does not understand GARP, or may not be able to keep up with the rate at which the GARP’s are sent during an HA failover event (approximately 200/s), the NetScaler can be configured with VMAC to create a floating MAC address to pair up with the floating IP addresses. This will solve the potential issues associated with GARP’s from the NetScaler."
upvoted 2 times
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