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質問 # 13
Which command must be configured at the interface level to honor Differentiated Services Code Point (DSCP)
-based Class of Service (CoS) on a ICX7750?
- A. qos profile
- B. trust dscp
- C. qos-tos map dscp-priority
- D. ip dscp-remark 1
正解：B
解説：
To configure a RUCKUS ICX 7750 switch to honor Differentiated Services Code Point (DSCP)-based Class of Service (CoS) at the interface level, the trust dscp command is used. This command instructs the switch to trust and utilize the DSCP values in incoming packets for Quality of Service (QoS) decisions.
Configuration Steps:
* Access the Switch's Command Line Interface (CLI):
* Use SSH or a direct console connection to access the switch's CLI.
* Enter Global Configuration Mode:
* At the prompt, enter:
enable
configure terminal
* Select the Interface to Configure:
* Specify the interface where DSCP trust should be enabled. For example, to configure Ethernet interface 1/1/1:
interface ethernet 1/1/1
質問 # 14
When a high CPU alert about an ICX switch is triggered, which command will provide more detail on the processes taking up CPU cycles?
- A. show cpu
- B. show cpu tasks
- C. show cpu histogram
- D. show process
正解：B
解説：
When a high CPU utilization alert is triggered on a RUCKUS ICX switch, it's essential to identify the processes consuming excessive CPU resources. The show cpu tasks command provides detailed information about active processes and their CPU usage.
Command Usage:
show cpu tasks
Output Example:
Task Name CPU Time (ms) Invocations Avg Time (us)
------------------ -------------- ------------ -------------
TaskA 5000 1000 5000
TaskB 3000 1500 2000
In this output:
* Task Name lists the names of active processes.
* CPU Time (ms) indicates the total CPU time consumed by each process in milliseconds.
* Invocations shows how many times each process has been called.
* Avg Time (us) represents the average time per invocation in microseconds.
By analyzing this data, administrators can pinpoint processes that are utilizing disproportionate CPU resources, facilitating targeted troubleshooting and optimization.
質問 # 15
Why is the following command failing?
RKUS-01(config)#vlan 1
RKUS-01(config-vlan-1)#tagged ethernet 1/2/1
Invalid input -> tagged ethernet 1/2/1
Type ? for a list
- A. A Virtual Ethernet interface must be defined before a tagged port can be added.
- B. This model ICX does not have an interface Ethernet 1/2/1.
- C. VLAN 1 must be configured as a protocol-based VLAN before tagged ports can be added.
- D. The default VLAN cannot be tagged to any interfaces.
正解：D
質問 # 16
Which three objects can be assigned a Layer 3 address? (Choose three.)
- A. Virtual LAN
- B. Loopback
- C. VxLAN
- D. GRE tunnels
- E. Stack Interface
- F. Virtual Ethernet
正解：B、D、E
解説：
* Layer 3 Address Assignment:
* Stack Interface (A): A stack interface is a virtual interface representing all members of a stack.
It can be assigned a Layer 3 IP address for management or routing purposes.
* Loopback (E): Loopback interfaces are virtual interfaces always "up" and used for routing, management, or stable endpoint addressing.
* GRE Tunnels (F): GRE tunnels operate at Layer 3 and require IP addresses for both endpoints to encapsulate and route traffic.
* Why Not Other Options?
* B. VxLAN: VxLAN operates at Layer 2 over Layer 3 and does not require direct IP address assignment to itself.
* C. Virtual LAN: VLANs are Layer 2 constructs; while they are associated with SVI (Switch Virtual Interfaces), they are not directly assigned an IP address.
* D. Virtual Ethernet: Virtual Ethernet interfaces are typically Layer 2 and used within virtualized environments, not directly assigned Layer 3 addresses.
References:
* ICX Routing Configuration Guide: RUCKUS Documentation
質問 # 17
By default, how often are VRRP-E hello messages sent from the master?
- A. every 1 second
- B. every 3 seconds
- C. every 5 seconds
- D. every 60 seconds
正解：A
質問 # 18
Which command enables Open Shortest Path First (OSPF) globally?
- A. ip ospf area 0
- B. ip ospf cost 100
- C. router ospf
- D. area 0
正解：C
質問 # 19
Which command enables Open Shortest Path First (OSPF) globally?
- A. ip ospf area 0
- B. ip ospf cost 100
- C. router ospf
- D. area 0
正解：C
解説：
To enable Open Shortest Path First (OSPF) globally on a RUCKUS ICX switch, the router ospf command is used. This command initiates OSPF routing processes, allowing the switch to participate in OSPF-based dynamic routing.
Steps to Enable OSPF Globally:
* Access Global Configuration Mode:
* Enter privileged EXEC mode and then global configuration mode:
enable
configure terminal
* Enable OSPF Routing:
* Activate the OSPF routing process:
router ospf
* Assign OSPF Parameters:
* Set the router ID (optional but recommended):
router-id <A.B.C.D>
* Specify OSPF areas and associate interfaces:
network <network-address> <wildcard-mask> area <area-id>
* Configure OSPF on Interfaces:
* Enter interface configuration mode for each interface participating in OSPF:
interface <interface-type> <interface-number>
ip ospf area <area-id>
* Save Configuration:
* Ensure the configuration persists after a reboot:
write memory
Example Configuration:
To configure OSPF with a router ID of 1.1.1.1 and include the network 192.168.1.0/24 in area 0:
configure terminal
router ospf
router-id 1.1.1.1
network 192.168.1.0 0.0.0.255 area 0
exit
interface ethernet 1/1/1
ip ospf area 0
exit
write memory
Considerations:
* Licensing: Ensure the switch has the appropriate Layer 3 license to support OSPF.
* Compatibility: Verify that the FastIron software version supports OSPF.
* Network Planning: Properly design OSPF areas and hierarchies to optimize routing efficiency.
References:
* Ruckus FastIron Layer 3 Routing Configuration Guide, 08.0.91
* Ruckus FastIron Command Reference Guide, 08.0.70
質問 # 20
Which switch model provides the most 100Gb ports?
- A. ICX7750-32Q
- B. ICX7850-48FS
- C. ICX7850-32Q
- D. ICX7850-48F
正解：C
質問 # 21
When running FastIron SPS08095e code, which step is required to define static routes?
- A. Install the L3-prem license.
- B. Run the UFI code image for GZR08095h.
- C. Upgrade to version SPS08095h or later.
- D. Change the ICX image version to SPR08095e.bin.
正解：A
解説：
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.
質問 # 22
Which device will become the root in the Spanning Tree election process?
- A. the device with the highest IP address
- B. the device with the highest bridge priority value
- C. the device with root guard enabled
- D. the device with the lowest bridge ID
正解：B
質問 # 23
Which ICX model can run silently in fanless mode?
- A. ICX7150-48PF
- B. ICX7150-48ZP
- C. ICX7150-48P
- D. ICX7550-24P
正解：A
解説：
The RUCKUS ICX7150 series includes models designed for silent operation, suitable for deployments in noise-sensitive environments such as offices or classrooms.
質問 # 24
What is the highest Power over Ethernet (PoE) power class supported by 802.3bt?
- A. 0
- B. 1
- C. 2
- D. 3
正解：B
質問 # 25
Which command can be used to identify Cyclic Redundancy Check (CRC) errors on port Ethernet 1/1/1?
- A. show mac-address ethernet 1/1/1
- B. show port security ethernet 1/1/1
- C. show statistics ethernet 1/1/1
- D. show interfaces brief ethernet 1/1/1
正解：C
質問 # 26
What are two features of Open Shortest Path First (OSPF)? (Choose two.)
- A. calculates link cost
- B. uses exterior gateway protocols
- C. updates routes dynamically
- D. utilizes distance vector
- E. automatic redistribution of routes
正解：A、C
解説：
Open Shortest Path First (OSPF) is a widely used interior gateway protocol (IGP) designed for routing within an autonomous system (AS). It is a link-state routing protocol that offers several key features:
Key Features of OSPF:
* Calculates Link Cost:
* OSPF assigns a cost to each link, representing the overhead required to send packets across that link. The cost is typically based on the link's bandwidth; higher bandwidth links have lower costs.
* OSPF uses these costs to calculate the shortest path to each network destination, ensuring efficient routing.
* Updates Routes Dynamically:
* OSPF routers exchange link-state advertisements (LSAs) to share information about network topology changes.
* When a change occurs, such as a link failure, OSPF quickly propagates this information, allowing routers to update their routing tables dynamically and converge on a new optimal topology.
Clarifications on Other Options:
* Option A: Utilizes distance vector
* OSPF is a link-state protocol, not a distance vector protocol. Distance vector protocols, like RIP, use different mechanisms for route calculation.
* Option C: Automatic redistribution of routes
* OSPF does not automatically redistribute routes from other routing protocols. Route redistribution between different protocols requires manual configuration.
* Option E: Uses exterior gateway protocols
* OSPF is an interior gateway protocol (IGP) used within a single autonomous system, not an exterior gateway protocol (EGP) like BGP, which is used between autonomous systems.
References:
* OSPF Design Guide
* Understanding OSPF
質問 # 27
Which two ICX switch models are recommended for collapsed aggregation and core network designs? (Choose two.)
- A. ICX7550
- B. ICX7850
- C. ICX7250
- D. ICX7750
- E. ICX7450
正解：B、D
質問 # 28
A customer required an access switch with a Power over Ethernet (PoE) budget not to exceed 240W. They also require the switch to make no fan noise. Which ICX switch would fit these requirements?
- A. ICX7150-24P
- B. ICX7150-C12P
- C. ICX7150-48P
- D. ICX7150-C10ZP
正解：A
質問 # 29
Which command assigns an interface to an area?
- A. ip ospf area 0
- B. ip ospf cost 100
- C. router ospf
- D. area 0
正解：A
質問 # 30
As an IP packet is routed across subnets, which value gets updated at each hop?
- A. subnet mask
- B. destination MAC address
- C. destination IP address
- D. source IP address
正解：B
質問 # 31
When using zero-touch stacking, which two prerequisites must be in place to ensure all devices join the stack? (Choose two.)
- A. issue stack disable on intended member devices
- B. ensure units have clean configurations
- C. enable stacking on all devices
- D. configure each unit's management IP, VLANs, and tagging
- E. enable stacking on the active controller
正解：B、E
質問 # 32
For multicast clients to stop receiving traffic using a leave request, which protocol must run on the local subnet?
- A. PIM Dense
- B. IGMPv1
- C. IGMPv2
- D. IGMP Snooping
正解：B
質問 # 33
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