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Cisco 300-620 exam is designed for IT professionals who are looking to validate their knowledge and skills in implementing Cisco Application Centric Infrastructure (ACI). 300-620 exam is part of the requirements for the CCNP Data Center certification, which is an advanced-level certification for individuals who specialize in designing, implementing, and managing data center solutions.
To prepare for the 300-620 Exam, candidates can take advantage of a wide range of study resources offered by Cisco, including training courses, practice exams, and online communities. Cisco also recommends that candidates have hands-on experience with ACI solutions and be familiar with related technologies such as virtualization, automation, and network security.
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The following will be discussed in CISCO 300-620 Exam Dumps:
NEW QUESTION # 142
An engineer must limit management access to me Cisco ACI fabric that originates from a single subnet where the NOC operates. Access should be limited to SSH and HTTPS only. Where should the policy be configured on the Cisco APIC to meet the requirements?
Answer: B
Explanation:
Explanation
https://www.cisco.com/c/en/us/td/docs/switches/datacenter/aci/apic/sw/1-x/Operating_ACI/guide/b_Cisco_Oper
NEW QUESTION # 143
Cisco ACI fabric contains 10 standalone leaf switches. An engineer must configure only the first two leaf switches in a VPC. Which VPC protection type must be configured to accomplish goal?
Answer: A
Explanation:
The scenario involves a Cisco ACI fabric with 10 standalone leaf switches, and the engineer must configure only the first two leaf switches (e.g., Leaf-1 and Leaf-2) in a Virtual Port Channel (vPC) configuration. The goal is to select the appropriate vPC protection type to achieve this specific pairing while leaving the other eight leaf switches standalone.
Requirement Analysis
In Cisco ACI, vPC is used to provide active-active link redundancy and load balancing between two leaf switches connected to the same set of endpoints (e.g., servers or external devices).
The fabric contains 10 standalone leaf switches, meaning no pre-existing vPC pairs are configured, and the task is to form a vPC specifically between the first two leaf switches.
The vPC protection type determines how the pair is defined and protected within the ACI fabric, ensuring the configuration is limited to the intended switches.
Option Evaluation
A . serial:
The "serial" protection type is not a valid vPC protection option in Cisco ACI. This term might be confused with serial link configurations or other networking contexts, but it does not apply to vPC in ACI.
Reference:
B . explicit:
The "explicit" vPC protection type allows the engineer to manually specify the exact pair of leaf switches to form a vPC. In this case, the engineer can configure Leaf-1 and Leaf-2 as an explicit vPC pair, leaving the other eight leaf switches standalone. This method provides precise control over which switches are paired, aligning with the requirement to configure only the first two.
C . reciprocal:
The "reciprocal" protection type is not a standard vPC protection option in ACI. This term might imply mutual protection, but it is not documented as a specific vPC configuration mode in ACI.
D . consecutive:
The "consecutive" protection type is not a recognized vPC protection option in ACI. It might suggest pairing switches based on their IDs (e.g., consecutive node IDs), but ACI does not use this as a formal protection mechanism. The fabric could interpret this incorrectly, potentially pairing unintended switches.
Final Answer Justification
B is correct because the "explicit" vPC protection type allows the engineer to manually designate Leaf-1 and Leaf-2 as a vPC pair, ensuring that only these two switches are configured in a vPC while the remaining eight leaf switches remain standalone. This method provides the precision needed to meet the goal and is a standard feature in ACI vPC deployments.
Primary Cisco Reference:
Cisco APIC Layer 2 Networking Configuration Guide, "Configuring vPC with Explicit Protection." Cisco ACI Design Guide, "vPC Deployment Options." Cisco ACI vPC Best Practices, "Explicit vPC Pair Configuration."
NEW QUESTION # 144
Refer to the exhibit.
A customer is deploying a WAN with these requirements: *Routers 1 and 2 must receive only routes 192.168.11.0/24 and 192.168.21.0724 from the Cisco ACI fabric *Reachability to the WAN users must be permitted only for the servers that are located in vrf_prod.
Which settings must be configured to meet these objectives?
Answer: D
Explanation:
The scenario involves deploying a WAN with Cisco ACI, where Routers 1 and 2 (connected via an L3Out with OSPF Area 0) must receive specific routes (192.168.11.0/24 and 192.168.21.0/24) from the ACI fabric, and reachability to WAN users must be permitted only for servers in vrf_prod. The diagram shows three bridge domains (bd_vlan11, bd_vlan21, bd_vlan31) with their respective subnets and EPGs, all under vrf_prod, along with an L3Out (epg_l3out) for WAN connectivity.
Requirement Analysis
Routers 1 and 2 must receive only routes 192.168.11.0/24 and 192.168.21.0/24:
These subnets belong to bd_vlan11 and bd_vlan21, respectively. To advertise these routes to Routers 1 and 2 via the L3Out, they must be marked with the appropriate scope in the bridge domain configuration.
In ACI, the "Advertised Externally" scope on a subnet ensures that it is advertised to external routers via the L3Out routing protocol (OSPF in this case).
Reachability to WAN users must be permitted only for servers in vrf_prod:
This implies that only the subnets in vrf_prod (192.168.11.0/24, 192.168.21.0/24, and 192.168.31.0/24) should be accessible, but WAN users should only reach specific subnets based on policy.
The external EPG (epg_l3out) represents the WAN users (10.171.0.0/16), and its subnet scope must control inbound reachability.
The subnet 192.168.31.0/24 (bd_vlan31) should not be advertised to the WAN, as it is not listed in the routes Routers 1 and 2 should receive.
Option Evaluation
A . Configure the subnets 192.168.11.0/24 and 192.168.21.0/24 as Private to VRF. Configure the subnet 192.168.31.0/24 as Advertised Externally. Configure an EPG subnet 0.0.0.0/0 as External Subnets for External EPG:
Setting 192.168.11.0/24 and 192.168.21.0/24 as "Private to VRF" means they are not advertised externally, which fails the requirement for Routers 1 and 2 to receive these routes.
Setting 192.168.31.0/24 as "Advertised Externally" incorrectly advertises this subnet to the WAN, which is not desired.
The "External Subnets for External EPG" scope on 0.0.0.0/0 allows WAN users to reach all subnets in vrf_prod, which is correct for reachability.
Conclusion: Fails the first requirement (route advertisement).
Reference:
B . Configure the subnets 192.168.11.0/24 and 192.168.21.0/24 as Private to VRF. Configure the subnet 192.168.31.0/24 as Advertised Externally. Configure an EPG subnet 0.0.0.0/0 as Shared Route Control Subnet:
Similar to Option A, setting 192.168.11.0/24 and 192.168.21.0/24 as "Private to VRF" prevents their advertisement to the WAN, failing the first requirement.
Setting 192.168.31.0/24 as "Advertised Externally" incorrectly advertises this subnet.
The "Shared Route Control Subnet" scope allows route leaking between VRFs, which is irrelevant here since there is only one VRF (vrf_prod) and no route leaking is required.
Conclusion: Fails both requirements (route advertisement and reachability control).
C . Configure the subnets 192.168.11.0/24 and 192.168.21.0/24 as Advertised Externally. Configure the subnet 192.168.31.0/24 as Private to VRF. Configure an EPG subnet 0.0.0.0/0 as Shared Route Control Subnet:
Setting 192.168.11.0/24 and 192.168.21.0/24 as "Advertised Externally" ensures these subnets are advertised to Routers 1 and 2 via OSPF, meeting the first requirement.
Setting 192.168.31.0/24 as "Private to VRF" prevents its advertisement to the WAN, which aligns with the requirement since only 192.168.11.0/24 and 192.168.21.0/24 should be advertised.
The "Shared Route Control Subnet" scope on 0.0.0.0/0 in the external EPG is incorrect for controlling reachability. This scope is used for route leaking, not for defining which subnets are accessible from the external EPG.
Conclusion: Meets the first requirement but fails the second (reachability control).
D . Configure the subnets 192.168.11.0/24 and 192.168.21.0/24 as Advertised Externally. Configure the subnet 192.168.31.0/24 as Private to VRF. Configure an EPG subnet 0.0.0.0/0 as External Subnets for External EPG:
Setting 192.168.11.0/24 and 192.168.21.0/24 as "Advertised Externally" ensures these subnets are advertised to Routers 1 and 2 via OSPF, meeting the first requirement.
Setting 192.168.31.0/24 as "Private to VRF" prevents its advertisement to the WAN, which is correct since only the specified subnets should be advertised.
The "External Subnets for External EPG" scope on 0.0.0.0/0 in the external EPG (epg_l3out) allows WAN users (10.171.0.0/16) to reach all subnets in vrf_prod, which includes 192.168.11.0/24, 192.168.21.0/24, and 192.168.31.0/24. This satisfies the second requirement, as servers in vrf_prod are accessible, and contracts can further restrict access if needed (though not specified in the question).
Conclusion: Meets both requirements (route advertisement and reachability).
Final Answer Justification
D is correct because:
It ensures that only 192.168.11.0/24 and 192.168.21.0/24 are advertised to Routers 1 and 2 by setting their scope to "Advertised Externally." It keeps 192.168.31.0/24 private to vrf_prod by setting its scope to "Private to VRF." It allows WAN users to reach all vrf_prod subnets (including servers) by setting 0.0.0.0/0 as "External Subnets for External EPG," fulfilling the reachability requirement.
Primary Cisco Reference:
Cisco APIC Layer 3 Configuration Guide, "Configuring Subnets for L3Out." Cisco ACI Routing and Forwarding Guide, "External EPG and Subnet Scopes." Cisco ACI Best Practices, "Controlling Route Advertisement and Reachability."
NEW QUESTION # 145
Refer to the exhibit, An engineer is deploying a Cisco ACI environment but experiences a STP loop between switch1 and switch2. Which configuration step is needed to break the STP loop?
Answer: A
NEW QUESTION # 146
Refer to the exhibit.
An engineer must configure an L3Out peering with the backbone network. The L3Out must forward unicast and multicast traffic over the link. Which two methods should be used to configure L3Out to meet these requirements? (Choose two.)
Answer: D,E
NEW QUESTION # 147
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