Deploy Aruba CX 6300 switches as data center spine switches is not a best practice when positioning ArubaOS-CX switches in data center networks. The Aruba CX 6300 switches are designed for data center leaf roles, and they provide high density, low latency, and advanced features such as VSX and EVPN. The Aruba CX 83xx switches are more suitable for data center spine roles, and they provide high performance, scalability, and resiliency1.

Virtual Switching Extension (VSX) is a high-availability technology that allows two ArubaOS-CX switches to operate as a single logical device. Split-recovery mode is a feature that prevents traffic loss when the Inter-Switch Link (ISL) goes out-of-sync and keepalive subsequently fails.
When split-recovery mode is enabled, the secondary VSX member disables its downstream links until it synchronizes with the primary member. When split-recovery mode is disabled, the secondary VSX member keeps its downstream links up even when it is out-of-sync with the primary member. Disabling split-recovery mode is a use case for situations where you want an admin to manually fail traffic over to the secondary member if the primary member fails. This can be useful for planned maintenance or testing purposes, where you want to avoid automatic failover and failback of traffic. To manually fail traffic over to the secondary member, you need to shut down the ISL on both VSX members. Therefore, this is a valid use case for disabling split- recovery mode on ArubaOS-CX switches in a VSX fabric.

Set the link-up delay timer based on the number of MAC forwarding, ARP, and routing table entries is a guideline for configuring the switches' link-up delay settings for Virtual Switching Extension (VSX) fabric. The link-up delay timer defines how long a VSX node waits before advertising link state changes to its peer node. This allows the node to synchronize its MAC forwarding, ARP, and routing tables with its peer node before sending or receiving traffic on the newly activated link1.

ERPS is a feature of ArubaOS-CX that prevents loops at layer 2 on ring networks1. ERPS uses a protocol called Ring Auto Protection Switching (RAPS) to detect link failures and perform fast traffic switchover1. ERPS has two timers that control the protection switching mechanism: guard timer and hold off timer1. The guard timer prevents false switching caused by delayed or lost RAPS PDUs1. The guard interval is set in units of 10 ms and should exceed the maximum expected delay for forwarding a frame around the complete ring1. This ensures that all switches on the ring receive the RAPS PDUs before the guard timer expires1. Therefore, this is a guideline for configuring timers for ERPS, and the correct answer is yes. For more information on ERPS and timers, refer to the Aruba Data Center Network Specialist (ADCNS) certification datasheet2 and the ERPS Guide for your switch model1.