SDWAN - Underlay Connectivity Services

A national pharmaceutical company has 3 locations connected to a headquarters using traditional WAN technology.  The pharmaceutical company opens up a 4th location and wants to implement SD-WAN services in the new location.

• The headquarters building has equipment that can be upgraded to use SD-WAN.

• The new location has 1 Private and 1 Public UCS.

During service activation testing, latency is very high for applications that use the Private UCS.  What can be done to prevent this issue from occurring?

• Define tighter latency and performance specifications of the UCS in the Service Level Specification

• Add an additional UCS.

• Increase the bandwidth of the UCS to 10 Gbps.

• Decrease the number of hops.

Which of the following is an advantage of a private UCS over a public UCS?

• Fast speed

• Better encryption

• Lower cost

• Better predictability

Which of the following is true?

• A UCS can be encrypted.

• A TVC can be encrypted

• An SWVC Endpoint can be encrypted.

• A UNI can be encrypted.

A Subscriber has the following requirements for SD-WAN services:

• 10 Mbps of bandwidth for critical Application Flows

• 60 Mbps of bandwidth for Application Flows with less resiliency than the critical data Application Flows

• Guest Wi-Fi of 35 Mbps needing Local Internet Breakout

What UCS options are the best choice for this Subscriber?

• Three public; one private 70 Mbps, one private 20 Mbps, and one public 200 Mbps

• Two; each 105 Mbps with strict Service Level Specifications

• Two public; one 10 Mbps, one 105 Mbps designated as BACKUP

• Three; one Private 10 Mbps, one Private 10 Mbps designated as BACKUP to the critical Application Flow, and one Public 95 Mbps with Internet Breakout

A Subscriber is reporting issues with a new public UCS.  Gathering data, you discover:

• The Subscriber is only using 25 Mbps of data.

• High levels of latency are being reported, exceeding the maximum their primary applications can tolerate.

• 50 Mbps of bandwidth was guaranteed.

What could have prevented these issues?

• Increasing the maximum upload and download speeds of the UCS

• Changing the number of hops to destinations over the UCS

• The geolocation database for the UCS

• Tighter Service Level Specifications

You need to size Underlay Connectivity Services for 3 remote sites and a headquarters laid out in a hub and spoke design.  The customer requires: 

• All traffic flows between the remote sites and headquarters only. 

• 80 Mbps of traffic each way between each remote site and headquarters. 

• One Public and one Private Underlay will be configured at each site, with 75% of the traffic on the Public and 25% on the Private at each location. 

• Both Underlays are available to all traffic in case of failure. 

Which is the best choice for sizing?

• Provision 60 Mbps for the Public Underlay and 20 Mbps for the Private Underlay at each remote site.

• Provision 80 Mbps for the Public Underlay and 80 Mbps for the Private Underlay at each remote site.

• Provision 40 Mbps for the Public Underlay and 40 Mbps for the Private Underlay at each remote site.

• • Provision 60 Mbps for the Public Underlay and 20 Mbps for the Private Underlay at each remote site.

  • Provision 180 Mbps for the Public Underlay and 60 Mbps for the Private Underlay at headquarters. 

  • Set the BACKUP service attribute to Enabled in SWVC policies

An SD-WAN Subscriber is experiencing a business slowdown and is looking to optimize their costs. As an SDCP you have worked with them to categorize their traffic into two groups.

• The first group is audio feeds that are highly sensitive to delay and must have a high availability.

• The second group can have a lower availability and is not sensitive to delay.

• The Subscriber has both a low-cost Public UCS with a very relaxed SLS as well as a Private UCS SLS with very strict low delay and frame loss. 

What do you recommend to the Subscriber?

• • Configure the Audio flows to prefer the Private UCS.

  • Configure the non-audio traffic to prefer the Public UCS.

  • Enable both UCS as backups.

• • Configure the Audio traffic to prefer the Private UCS.

  • Set the PUBLIC-PRIVATE service Attribute to Private-Only for all audio flows.

  • Configure the non-Audio traffic to only use the Public UCS.

• • Configure the audio traffic flows to prefer the Private UCS.

  • Configure the non-audio traffic flows to prefer the Public UCS only.

  • Designate as a Backup UCS the Public UCS.

• • 
    Configure the Audio traffic flows to prefer the Private UCS.

  • Set the PUBLIC-PRIVATE service Attribute to Either for all audio flows.

  • Configure the non-Audio traffic to only use the Public UCS.

An existing SD-WAN subscriber wants to minimize the use of firewalls by migrating to a solution that limits Internet access to only their corporate headquarters.  Each branch features:

• Two 250 Mbps UCS, one Public and one Private

• 250 Mbps of SD-WAN traffic sent towards the headquarters

• 100 Mbps of Internet traffic

• Additionally, the Subscriber needs resilience for the Internet bound traffic. 

 

Which of the following is appropriate for the customer?

• • Set PUBLIC-PRIVATE to Private-Only for all. 

  • Application Flows bound for the Internet.

  • Upgrade both UCS to 350 Mbps.

• • Set INTERNET-BREAKOUT to Disabled at each branch.

  • Set PUBLIC-PRIVATE to Either for all Application Flows bound for the Internet.

  • Upgrade both UCS to 350 Mbps.

• • Set INTERNET-BREAKOUT to Disabled at each site.

  • Upgrade the Public UCS to 350 Mbps.

  • Backhaul traffic over TVCs on the Public Service.

• • Set INTERNET-BREAKOUT to Disabled at each branch.

  • Set PUBLIC-PRIVATE to Private-Only at each branch.

  • Upgrade the Private UCS to 350 Mbps.

A legal firm is upgrading from a legacy network of IP VPN MPLS to SD-WAN to improve availability.  They wish to implement it over only Internet UCSs.  Each location of the firm is rented and has a coax line provided.  The leases do not allow additional physical installations.  What do you recommend for UCS access links?

• An HFC link and a PON link from different providers

• Two HFC links from the cable provider

• Two HFC links from different providers

• An HFC link and a LTE access from the same company

A hospital has an application to exchange medical records subject to patient confidentiality.  An SD-WAN Service is installed with dual UCSs that connect the hospital with a local clinic.  The clinic is reporting slowness whenever using the application.

• Increase bandwidth for both UCS.

• Apply a policy to use one UCS as a backup.

• Apply a policy that selects a UCS based on performance.

• Use Internet breakout at the hospital.