Interview Questions.

Question 1. Does Nx-0s 5.0 Run Npiv?

Answer :

Yes, it is supported in NX-OS 5.0. Nexus 5000 platform helps N port  identifier virtualization (NPIV) and N-Port Virtualization(NPV) seeing that NX-OS 4.0  version. Nexus 5K helps two modes. By default, Cisco Nexus 5000 and 5500  Series switches operate in cloth mode, in this mode transfer gives widespread FC  switching functionality and functions. Second mode is NPV, in NPV mode Nexus 5K  switches relays all of the site visitors from server-aspect ports oto the core transfer.(NPIV  enabled transfer). The core transfer offers F port capability and all FC  switching competencies.

Question 2. Is Fcoe Between Data Centers Possible?

Answer :

Yes, FCoE between Data Centers is viable. VE Ports will let you construct  multi-hop FCoE fabric by using interconnecting a couple of FCF, VE port functions as a  Fibre Channel E-port going for walks on pinnacle of a lossless Ethernet material. The maximum  distance between  Cisco Nexus 5000 Series switches is 3000m for FCoE  (lossless Ethernet) traffic with NX-OS five.Zero(2)N1.1. It can be enabled the usage of the  pause no-drop buffer-length buffer-length pause-thresholdxoff-size resume-threshold xon-size command in QOS configuration.

Here are the most  distances:

Nexus 55xx to Nexus 55xx - 3km
Nexus 50x0 to Nexus 50x0 - 3km
Nexus 50x0 to Nexus 55xx - 3km
Nexus 55xx to Nexus 2232 - 300m
Nexus 50x0 to Nexus 2232 - 300m
Networking Interview Questions
Question 3. Can You Explain The Vlan Trunking Channels A Little Bit More?

Answer :

We help Virtual LAN on pinnacle of the Fibre channel Over ethernet paintings. So  trunking means we supply special Virtual LAN altogether in a single ISL. And the  identical on FCOE we additionally help Virtual SANs and can carry more than one virtual SANs on  one isl. In turns of multi-hop FCOE we are able to see that we could convey a couple of  digital LAN and virtual SANs collectively.

Question 4. Can Fcoe Be Used With Ucs?

Answer :

Yes. In modern day UCS 1.Four release, you may directly connect FCoE objectives to the  Fabric Interconnect ports. Also on UCS system we've FIP cabable (Gen2) CNAs  and Pre-FIP (Gen1) CNAs running on the blades that utilizes FCoE among blades  and Fabric Interconnect. If you would like to extend Fabric Interconnect  connectivity with VE ports and connecting them to Nexus 5K switches in terms of  running multi-hop FCoE, we don't help this at the UCS software but.

Networking Tutorial
Question 5. What Is The Next Data Rate After 10 Gig For Fc? Is It 16 Gig? When Will It Be Supported?

Answer :

After the ten Gig model the dialogue are in 12 Gig and 16Gig. If you are  asking Cisco can be helping sixteen gig FC, sure we can be assisting it and we  can have products in an effort to be supporting 16 gig FC.

Underground Cable Interview Questions
Question 6. Is There A Limit On The Number Of Hops That Can Be Made In A Multihop Environment/design?

Answer :

The limit is 7 surely. You may have upto 7 FCoE hops which are examined and  supported with the aid of Cisco. If there may be any requirement to assist greater than 7 hops,  that can be tested with the aid of Cisco.

Question 7. Can We Configure Multiple Cos Values For Pfc ?

Answer :

Yes, if you are asking you can use distinctive COS values for PFC. PFC uses the  IEEE 802.1p CoS values within the IEEE  802.1Q VLAN tag to differentiate up to eight  CoSs that may be problem to  float control independently. So on Nexus 5K,by means of  default we've got eight lanes , eight qos-groups. Qos 6 and Qos 7 are reserved for control  aircraft trafic and the rest 6 qos-organizations can be assigned to drop-class or  no-drop-elegance. By default FCoE is assigned COS three.

Switching Interview Questions
Question 8. What If We Want To Trunk Multiple Data Vlans To A Service Thats Running Esxi For Example Do We Still Need To Configure Trunking On Switch Ports?

Answer :

Yes in case you need to hold more than one statistics VLANs on ESXi , we clearly want to  configure trunking. Also another motive in case you want to use FCoE, Fiber  Channel over Ethernet Initialization Protocol (FIP) uses the native VLAN and  therefore all FCoE links need to be trunked to carry the FCoE VLAN as well as the  local VLAN.

Question nine. What Is The Difference Between Cee And A Dce?

Answer :

CEE is the Converged Enhanced Ethernet. The CEE authors institution became an casual  institution of businesses that submitted the initial proposals of PFC , ETS and DCBX to  the IEEE DCB operating organization.DCE is a Cisco term that describes the architectural  series of ethernet extensions based on open requirements. DCE includes help  for the ethernet extensions located in EEE DCB.

Cisco Nexus switches Interview Questions
Question 10. How Is The Fcoe License Activated On The Nexus 5000 Or 5500 Series?

Answer :

There is an alternative in the Nexus 5000 called storage carrier license which is  activated whilst it's far shipped from Cisco. When ordered as a seperate line card  object an activation key and the procedure for activating the code is brought in  an envelope. Because this is constantly gift and best activation is needed and  any Nexus 5k will routinely initiate the 120 days brief license for a  storage protocol service from the first use of FC or FCoE command.

Question eleven. Is Fcoe Ip Routable?

Answer :

No, there is no Ip layer in FCoE. FC-BB-five carries FCIP this is  "IP-routable". FCoE is FC-routable. FCoE switches may additionally ahead FC frames across  unique Ethernet Clouds, FCoE switches may additionally ahead FC frames over the Internet  using FCIP.

FOC (Fiber Optic Route Checker) Interview Questions
Question 12. Do I Need To Enable Jumbo Frames For Fcoe?

Answer :

Yes. You need to enable jumbo frames because the FC payload is 2,112  bytes  and allowing jumbo frames will preserve FCoE visitors from being fragmented. On Nexus  5K, we have a pre-defined Class of Service (CoS) to be FCoE, that is by using default  has the cost three. Within this CoS, the MTU size it set to 2158.

Networking Interview Questions
Question 13. What Are The Hardware Requirements For Deploying Fcoe? What Are Your Recommendations And Suggestions For Optimizing Fcoe Deployments?

Answer :

In standard, FCoE calls for a transfer that enables data center bridging (DCB) to extend conventional Ethernet networks to suit the shipping of storage traffic without dropping data. Some (however not all) of the Ethernet providers guide DCB functionality for 10 GbE switches. Meanwhile, the converged community adapter (CNA) is suitable for FCoE. The CNAs are for use with conventional Ethernet and Fiber Channel host bus adapters (HBAs) and help Ethernet and Fibre Channel at the identical cable on the equal time. These CNAs are 10 Gbps over each Ethernet and Fiber Channel.

Question 14. What Software Is Needed To Deploy Fcoe And How Well Are These Software Stacks Adapted To Fcoe?

Answer :

We have been jogging FCoE for the reason that 2008, first on Windows. FCoE helps the latest version of Linux, Solaris and different operating structures. Each CAN adapter has a driving force that works in the right environment. And many CNA carriers use the identical suite of drivers for each local Fiber Channel and FCoE. FCoE also helps VMware. Now, a few humans are looking to make FCoE iSCSI within the working gadget, but this relies upon on what number of people buy it account.

Question 15. Does Fcoe Have Storage Subsystems That Meet Specific Needs? What Are The Features Of Fiber Channel Subsystems?

Answer :

FCoE can guide the garage subsystem locally, and a few vendors have said it publicly. NetApp has additionally implemented local FCoE help in addition to different carriers. The FCoE material must be interoperable with the local Fiber Channel fabric and the FCoE need to help all Fiber Channel functions. We tested the servers that let FCoE CAN connect with DCB / FCoE switches (their nearby Fiber Channel ports also are linked to nearby Fiber Channel storage systems) to look in the event that they had been working as anticipated. At the garage machine interface degree, FCoE is equal to Fiber Channel going for walks at 10 Gbps. The handiest difference is that it connects the DCB / FCoE switch in place of the nearby Fiber Channel switch.

Border Gateway Protocol (BGP) Interview Questions
Question 16. What’s The Right Management Tool For Fcoe Storage? What Is The Level Of Support For Third-celebration Data Center Management Tools By Fcoe? Also, Are Management Tools And Storage Subsystems Together Better?

Answer :

The DCB / FCoE switches have their very own partitioning interface, but it's far up to the seller, which is just like their corresponding Fiber Channel interface. HBA / CAN Providers Storage providers that aid FCoE use the identical management interface that was previously used on adapters, and make the management interface almost equal to Fiber Channel. Although we did now not take a look at a great deal 1/3-party storage control software program, FCoE and Fibre Channel ought to be just like this control software program. The fundamental difference is that FCoE garage will connect to distinctive switches in preference to neighborhood Fiber Channel garage.