RCNI Questions and Answers

To determine the IP address of a device connected to a specific switch port on a RUCKUS ICX switch, the following commands can be utilized:

show lldp neighbor detail

This command provides detailed information about devices connected via LLDP, including their IP addresses.

Command Usage:

show lldp neighbor detail

Output Example:

Local Port: 1/1/2

Neighbor MAC: 60d0.2c1c.1cd0

System Name: RuckusAP

Management Address: 192.168.0.3

In this example, the Management Address field displays the IP address of the connected device on port 1/1/2.

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show arp

The Address Resolution Protocol (ARP) table maps IP addresses to MAC addresses. By examining the ARP table, you can identify the IP address associated with a device's MAC address.

Command Usage:

show arp

Output Example:

IP Address MAC Address Type Age Port

192.168.0.3 60d0.2c1c.1cd0 Dynamic 0 1/1/2

Here, the IP address 192.168.0.3 is associated with the MAC address 60d0.2c1c.1cd0 on port 1/1/2.

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Note: For the show lldp neighbor detail command to provide IP addresses, LLDP must be enabled on both the switch and the connected devices. Additionally, the devices should support LLDP and be configured to advertise their management addresses.

Locating CRC Errors:

The show statistics ethernet [port] command provides detailed port statistics, including packet counts, errors, and specifically Cyclic Redundancy Check (CRC) errors.

Why Other Commands Don't Work:

B. show interfaces brief ethernet 1/1/1: This provides a summary of interface status but does not include detailed error information like CRC errors.

C. show mac-address ethernet 1/1/1: This displays MAC address table entries for the specified port, unrelated to error statistics.

D. show port security ethernet 1/1/1: This shows port security configurations and violations, not errors like CRC.

References:

ICX Switch Command Reference: RUCKUS Documentation

In network architecture, a collapsed aggregation and core design consolidates the aggregation and core layers into a single layer, simplifying the network and reducing latency. RUCKUS ICX switch models suitable for such designs include:

ICX7850:

Overview:

A high-performance, stackable switch designed for enterprise aggregation and core layers.

Key Features:

Supports up to 32 ports of 40/100 GbE, providing high-density connectivity.

Advanced stacking capabilities, allowing up to 12 switches to be stacked together for simplified management and scalability.

Dual hot-swappable power supplies and fans, ensuring high availability and reliability.

Use Case:

Ideal for organizations seeking to implement a collapsed core architecture with high bandwidth requirements and simplified network management.

RUCKUS ICX switches support stacking over both copper and fiber connections, allowing for flexible deployment across various distances:

Copper Stacking Cables:

Maximum Distance:

Up to 5 meters using active direct-attach copper (DAC) cables.

Use Case:

Suitable for stacking switches within the same rack or in close proximity.

Fiber-Optic Stacking Cables:

Maximum Distance:

Up to 40 kilometers using appropriate optical transceivers and single-mode fiber.

Use Case:

Ideal for stacking switches located in different buildings or across a campus environment.

References:

For detailed information on stacking distances and supported optics, refer to the FastIron stacking distances and optics guide: FastIron stacking distances and optics by device

By utilizing fiber-optic connections with appropriate transceivers, ICX switches can be stacked over substantial distances, providing flexibility in network design and deployment.

To enable IPv6 functionality on a RUCKUS ICX switch, you must activate IPv6 unicast routing globally. This allows the switch to forward IPv6 packets and participate in IPv6 routing.

Steps to Enable IPv6 Unicast Routing:

Access the Switch's Command-Line Interface (CLI):

Connect to the switch via console, SSH, or Telnet.

Enter privileged EXEC mode:

plaintext

Copy code

enable

Enter Global Configuration Mode:

Switch to global configuration mode:

plaintext

Copy code

configure terminal

Enable IPv6 Unicast Routing:

Activate IPv6 unicast routing:

ipv6 unicast-routing

Configure IPv6 Addresses on Interfaces (Optional):

Assign IPv6 addresses to the desired interfaces:

interface ethernet 1/1/1

ipv6 address 2001:db8::1/64

Verify the Configuration:

Exit to privileged EXEC mode and display the running configuration to confirm:

end

show running-config

References:

For detailed information on configuring IPv6 addresses, refer to the RUCKUS FastIron Layer 3 Routing Configuration Guide: Configuring a global or site-local IPv6 address with a manually configured interface ID

By following these steps, you enable the switch to handle IPv6 traffic, facilitating IPv6 communication within your network.

To define static routes on a device running FastIron SPS08095e code, it's essential to have the appropriate licensing in place.

Understanding Licensing Requirements:

RUCKUS ICX switches require specific licenses to enable advanced features.

The "L3-prem" (Premium Layer 3) license unlocks advanced routing capabilities, including the ability to configure static routes.

Verifying Current License Status:

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

Execute the command show license to display the current licensing status.

Check for the presence of the "L3-prem" license in the output.

Installing the L3-prem License:

If the "L3-prem" license is not installed, obtain it from RUCKUS Networks or an authorized distributor.

Follow the official RUCKUS licensing guide for detailed installation instructions.

Configuring Static Routes:

Once the "L3-prem" license is active, enter global configuration mode by typing configure terminal.

Use the ip route command to define static routes. For example: ip route [destination_network] [subnet_mask] [next_hop_ip].

After configuring, save the settings with the write memory command to ensure persistence across reboots.

References:

For detailed information on licensing and feature sets, refer to the FastIron 08.0.95 (GA) Software Licensing Guide.

The RUCKUS ICX7150 series includes models designed for silent operation, suitable for deployments in noise-sensitive environments such as offices or classrooms.

Comparison Between supportsave and show tech-support:

show tech-support: Generates diagnostic information and displays it on the CLI. It does not directly save or transfer the output.

supportsave: Gathers similar diagnostic data but also allows the data to be transferred to a remote server, such as via TFTP, for easier analysis.

Why Other Options Don't Apply:

A. Uses fewer CPU cycles during execution: Both commands are similar in terms of resource usage.

C. Uploads directly to RUCKUS support: Data transfer to RUCKUS support requires manual intervention.

D. Generates automatically after a system crash: Neither command generates data automatically; both require user execution.

References:

ICX Switch SupportSave Command Guide: RUCKUS Documentation

Understanding Bridge Priority:

The bridge priority in the Spanning Tree Protocol (STP) is represented in hexadecimal format in RUCKUS ICX switches.

In the output, the bridge priority is a combination of the priority value (default is 32768 or 0x8000 in hex) and the VLAN ID.

Why It Is 8000:

Unless explicitly modified, the default bridge priority is 8000 in hexadecimal.

Why Other Options Don't Apply:

B. 0: This value does not align with the default or modified priority values.

C. 9c49: This might represent a different component of the output, such as MAC address.

D. 20009: This is an incorrect representation of the bridge priority.

References:

ICX Spanning Tree Configuration Guide: RUCKUS Documentation

Dynamic ARP Inspection (DAI) is a security feature that intercepts and validates Address Resolution Protocol (ARP) packets in a network. It ensures that only legitimate ARP requests and responses are relayed, preventing ARP spoofing and man-in-the-middle attacks.

Conditions Allowing ARP Packets to Pass DAI Checks:

IP/MAC Pair in the DHCP Binding Database:

When DHCP snooping is enabled, the switch maintains a binding table of IP-to-MAC address mappings assigned by the DHCP server.

DAI uses this database to verify that ARP packets have legitimate IP/MAC address pairs.

If the ARP packet's IP/MAC pair matches an entry in the DHCP binding database, it passes the DAI check.

Static ARP Entry with Inspection Flag Set:

Administrators can configure static ARP entries for known devices, marking them as trusted for DAI purposes.

These entries include the IP/MAC pair and are flagged to bypass DAI checks.

An ARP packet matching a static entry with the inspection flag set will pass the DAI check.

Request Originated on a Trusted Port:

Ports can be designated as trusted, typically those connected to other switches or network devices.

DAI does not inspect ARP packets arriving on trusted ports, assuming they are from legitimate sources.

Therefore, ARP requests or responses from a trusted port pass the DAI check.

References:

For more information on configuring DAI and related security features, refer to the RUCKUS FastIron Layer 3 Routing Configuration Guide: Dynamic ARP Inspection overview

Implementing DAI with these conditions helps protect the network from ARP-based attacks by ensuring that only validated ARP traffic is permitted.