Authentic RUCKUS Certification Exam RCNI Questions Answers

To monitor and manage the PoE power budget on RUCKUS ICX switches, the following commands are utilized:

show inline power Command:

Purpose: Displays a summary of the PoE status, including total power capacity, power consumption, and available power.

Usage:

Access the switch's command-line interface (CLI).

Enter the command:

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show inline power

Output Details:

Power Capacity: Total PoE power available on the switch.

Power Allocations: Power consumption per port, indicating which ports are supplying power to connected devices.

Example Output:

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Power Capacity: Total is 124000 mWatts. Current Free is 64000 mWatts.

Power Allocations: Requests Honored 8 times

Port Admin Oper ---Power (mWatts)--- PD Type PD Class Pri Fault/

State State Consumed Allocated Error

-----------------------------------------------------------------------------

1/1/1 On On 4733 30000 2P-IEEE Class 4 3 n/a

1/1/2 On Off 6015 30000 2P-IEEE Class 4 3 n/a

(additional ports)

The RUCKUS ICX7850 series offers high-performance switches suitable for core and aggregation layers in enterprise networks. Among the models in this series:

ICX7850-32Q:

Overview:

Designed for high-density 100GbE deployments.

Port Configuration:

32 ports of 100GbE QSFP28.

Use Case:

Ideal for environments requiring extensive 100GbE connectivity, such as data centers or large enterprise cores.

ICX7850-48F:

Overview:

Designed for high-density 25GbE deployments with additional uplink capabilities.

Port Configuration:

48 ports of 1/10/25GbE SFP28.

8 ports of 40/100GbE QSFP28 for uplinks or stacking.

Use Case:

Suitable for aggregation layers where a mix of 25GbE access ports and high-speed uplinks are needed.

ICX7750-32Q:

Overview:

Part of the ICX7750 series, designed for high-performance aggregation and core layers.

Port Configuration:

32 ports of 40GbE QSFP+.

Supports breakout cables for 10GbE connections.

Use Case:

Suitable for networks requiring 40GbE connectivity with flexibility for 10GbE access.

ICX7850-48FS:

Overview:

Similar to the ICX7850-48F but includes MACsec support for enhanced security.

Port Configuration:

48 ports of 1/10/25GbE SFP28 with MACsec.

8 ports of 40/100GbE QSFP28 for uplinks or stacking.

Use Case:

Ideal for secure aggregation layers requiring MACsec encryption.

References:

For detailed specifications, refer to the ICX 7850 data sheet: ICX 7850 Data Sheet

In summary, the ICX7850-32Q model offers the highest number of 100GbE ports among the listed options, making it the optimal choice for scenarios demanding extensive 100GbE connectivity.

RSTP and Legacy 802.1D Compatibility:

RSTP (802.1w) can interoperate with legacy switches running STP (802.1D). However, the legacy switches use different timers and convergence mechanisms, which can lead to delays.

Optimizing Timers for Legacy Edge Switches:

The edge switches running 802.1D rely on BPDU timing set by the upstream aggregation switches.

To influence the convergence time, the timers such as hello time, max age, and forward delay must be adjusted on the aggregation switches connected to these legacy edge switches. This ensures better compatibility and faster convergence.

Why Not Other Options?

A: The route-only port does not participate in STP.

B: Timers cannot be modified on legacy switches themselves as they strictly follow 802.1D standards.

D: The root bridge sets global parameters but does not address edge-specific timer optimization.

References:

RUCKUS RSTP/802.1D Compatibility Guide: RUCKUS Documentation