Implementing and Operating Cisco Data Center Core Technologies (DCCOR)504 questions across 51 pages are complete and free, with no account or card.
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An engineer must deploy Cisco ACI in two data centers with a multisite configuration. The deployment must support a central management console for multiple data centers host multiple applications and support hardware and virtual clouds. Which product must be used?
Answer: C
Refer to the exhibit.
An engineer must restrict users assigned to the sangroup role on the Cisco MDS 9000 Series Switch from issuing commands on VSANs 15 to 20. Which command must the engineer run to achieve this objective?
Answer: D
The following example removes the permission for this role to perform commands for vsan 15 to 20. switch(config-role-vsan)# no permit vsan 15-20
Source: Adapted from community discussion — Mr_Myself
Refer to the exhibit.
An administrator connects a Cisco Nexus Series Switch to the Cisco ACI fabric. The connectivity must allow Cisco Discovery Protocol, LLDP, and LACP. Which action enables the protocols between Switch-1 and the ACI leaf switches?
Answer: A
Refer to the exhibit. Which command is run from the Guest Shell to set the description on the first five interfaces of the Cisco Nexus switch?
Answer: B
Correct B NXs1# guestshell [admin@guestshell ~]$ for x in {1..5}; do dohost "conf t ; interface eth1/$x ; description Server$x" ; done Enter configuration commands, one per line. End with CNTL/Z. Enter configuration commands, one per line. End with CNTL/Z. Enter configuration commands, one per line. End with CNTL/Z. Enter configuration commands, one per line. End with CNTL/Z. Enter configuration commands, one per line. End with CNTL/Z. [admin@guestshell ~]$
Source: Adapted from community discussion — freddycisco
An engineer must configure multiple EPGs on a single access port in a large Cisco ACI fabric without using VMM integration. The relevant access policies and tenant policies have been created. A single AAEP is used to configure the access ports in the fabric. Which two additional steps must be taken to complete the configuration? (Choose two.)
Answer: CE
Several production and development database servers exist in the same EPG and IP subnet. The IT security policy is to prevent connections between production and development. Which attribute must be used to assign the servers to different microsegments?
Answer: B
Reference: https://www.cisco.com/c/en/us/td/docs/switches/datacenter/aci/apic/sw/3-x/virtualization/b_ACI_Virtualization_Guide_3_1_1/ b_ACI_Virtualization_Guide_3_1_1_chapter_0100.html#concept_D527CF389D4440E69A288093516B3643
Source: Adapted from community discussion — mauchi
An environment consists of a Cisco MDS 9000 Series Switch that uses port channels. An engineer must ensure that frames between the source and the destination follow the same links for a specific flow. Subsequent flows are allowed to use a different link. Which load balancing method should be used to accomplish this goal?
Answer: D
Wrong. D is correct. Exchange based—The first frame in an exchange picks a link and subsequent frames in the exchange follow the same link. However, subsequent exchanges can use a different link. This provides more granular load balancing while preserving the order of frames for each exchange. Source: https://www.cisco.com/c/en/us/td/docs/switches/datacenter/mds9000/sw/5_0/configuration/guides/int/nxos/cli_interfaces/pc.html Load balancing attributes indicate the use of the source-destination ID (src-dst-id) or the originator exchange OX ID (src-dst-ox-id, the default) for load balancing path selection. Source: https://www.cisco.com/c/en/us/td/docs/switches/datacenter/mds9000/sw/6_2/configuration/guides/fabric/nx-os/nx_os_fabric/vsan.html?bookSearch=true
Source: Adapted from community discussion — Daeh
Refer to the exhibit. A host with a source address 10.10.10.10 sends traffic to multicast group 239.1.1.1. How do the vPC switches forward the multicast traffic?
Answer: D
D is correct. In this case, as Receiver1 gets the stream, and Receiver 2 will never get the stream due to missing OIF on Switch 2.
Source: Adapted from community discussion — designated
A network architect must redesign a data center network based on OSPFv2. The network must perform fast reconvergence between directly connected switches. Which two actions must be taken to meet the requirements? (Choose two.)
Answer: CD
Detecting link and node failures quickly is number one priority for fast convergence. For maximum speed, relying on IGP keepalive times should be avoided whether possible and physical failure detection mechanisms should be used. This implies the use of physical point-to-point links whether possible. BFD (BiDirectional Forwarding Detection) provides sub-second convergence for many protocols and is done in hardware. BFD will also only work on point-to- point links.
Source: Adapted from community discussion — NeoTheOne
Refer to the exhibit.
Which statement about the default gateway configuration of the vPC is true?
Answer: A
The correct answer is A because of the peer-gateway statement. vPC HSRP Gateway Considerations In normal Hot Standby Router Protocol operation, the active HSRP interface answers ARP requests, but with a vPC, both HSRP interfaces (active and standby) can forward traffic. The most significant difference between the HSRP implementation of a non-vPC configuration and a vPC configuration is that the HSRP MAC addresses of a vPC configuration are programmed with the G (gateway) flag on both systems, compared with a non-vPC configuration, in which only the active HSRP interface can program the MAC address with the G flag. Given this fact, routable traffic can be forwarded by both the vPC primary device (with HSRP) and the vPC secondary device (with HSRP), with no need to send this traffic to the HSRP primary device. Without this flag, traffic sent to the MAC address would not be routed.
Source: Adapted from community discussion — designated
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