VPC Peer Switch Benefits

Which three options are benefits of the vPC peers switch feature? (Choose 3) 
1. It eliminates the recommendation to pin the STP root to the vPC primary switch. 
2. It allows a pair of the vPC peer devices to appear as a single STP root in the Layer 2. 
3. It simplifies STP configuration by configuration both vPCs with the same STP priority.

What is Fabric Evacuation in UCS?

Feature which gracefully disable all the traffic through a fabric interconnect during upgrade.

What is VTP bombing?

It occurs when a server with a higher revision number and a wrong VTP database is inserted into the VTP domain. This situation may occur when a new switch is plugged into a stable VTP domain. The incorrect database is propagated to the domain and the earlier state database is overwritten.

best practice for connecting converged network adapters to the fabric

 Below are the best practice for connecting converged network adapters to the fabric.

1. Separate FCoE VLANS must be used for FCOE in SAN-A and SAN-B.
2. Cisco UF links must be configured as spanning-tree edge ports.
3. If MSTP is enabled, a separate MST instance must be used for FCOE vlans.

What is glean throttling in Cisco NX-OS ?

When forwarding an incoming IP Packet in a line card, if the address resolution request for the next hop us not resolved, the line card forwards the packets to the supervisor. The supervisor resolves the MAC address for the next hop and programs the hardware. this process is known as Glean throttling.

What is Ceilometer?

Ceilometer is a component of the Telemetry project. Its data can be used to provide customer billing, resource tracking, and alarming capabilities across all OpenStack core components.

why an upstream switch should allow storage appliance port traffic?

Appliance port traffic must be allowed on uptream switches in case of below scenario:-

1. If storage must be accessed outside of the UCS domain.
2. If storage and servers are located in different subnets.
3. If storage is configured in Active/Passive mode and both fabric interconnects require  communication to the same controller.