Cisco CCIE RS Core Concepts – Evolving Technologies Coming to CBT Nuggets

October 11, 2018 at 10:05 pm

Evolving Technologies

CBT Nuggets has you covered on the latest Evolving Technologies identified by Cisco Systems! Check out these critical topics covered in this upcoming course!


  • Compare and contrast public, private, hybrid, and multicloud design considerations
    • Infrastructure, platform, and software as a service (XaaS)
    • Performance, scalability, and high availability
    • Security implications, compliance, and policy
    • Workload migration
  • Describe cloud infrastructure and operations
    • Compute virtualization (containers and virtual machines)
    • Connectivity (virtual switches, SD-WAN and SD-Access)
    • Virtualization functions (NFVi, VNF, and L4/L6)
    • Automation and orchestration tools (CloudCenter, DNA-center, and Kubernetes)

Network programmability (SDN)

  • Describe architectural and operational considerations for a programmable network
    • Data models and structures (YANG, JSON and XML)
    • Device programmability (gRPC, NETCONF and RESTCONF)
    • Controller based network design (policy driven configuration and northbound/ southbound APIs)
    • Configuration management tools (agent and agentless) and version control systems (Git and SVN)

Internet of things (IoT)

  • Describe architectural framework and deployment considerations for IoT
    • IoT technology stack (IoT Network Hierarchy, data acquisition and flow)
    • IoT standards and protocols (characteristics within IT and OT environment)
    • IoT security (network segmentation, device profiling, and secure remote)

What is in Production at CBT Nuggets? Oct 10, 2018

October 10, 2018 at 10:21 am

CBT Nuggets

Your CBT Nugget instructors are hard at work – bringing you new and exciting IT content. Check out this list of courses currently in production!

Administering Microsoft SCCM and Cloud Services (70-703)

AWS Security — Compliance & Governance

AWS Security — Data Security

Border Gateway Protocol (BGP) – Advanced Topics

Citrix XenApp / XenDesktop 7.1x Administration – CCA-V (1Y0-203)

Cisco CCIE RS Core Concepts – Layer 3 Technologies

Cisco CCNA Data Center (200-150) DCICN

Cisco CCNP Collaboration CIPTV1 300-070

Designing and Deploying Microsoft Exchange Server 2016 (70-345)

(ISC)2 CISSP 2018

Linux Foundation Certified Sysadmin

Microsoft Project

Oracle Database 12c: SQL Fundamentals (1Z0-071)

Respect in the Workplace

Streamline With Salesforce Lightning

Tableau Essentials

Wrapped the Latest BGP Module at CBT Nuggets Today!

September 21, 2018 at 7:39 pm


That’s right- finished up the last Nugget today for the course below. I will post again here at the blog when the course appears on the CBT Nuggets website next week!

Border Gateway Protocol (BGP) – Scalability Mechanisms

  1. Module Introduction
  2. Private AS Numbers
  3. Peer Groups
  4. Session Templates
  5. Policy Templates
  6. IBGP Scalability Issues
  7. Route Reflectors
  8. Advanced Route Reflector Designs
  9. Confederations
  10. Configuring a Confederation
  11. Introduction to BGP Communities
  12. Community Attribute Formats
  13. Well-Known Communities
  14. Extended Communities
  15. Configuring BGP Communities

Remember, this is one more BGP module to complement the existing modules currently on CBT Nuggets:

  • BGP – Basic Operations
  • BGP – Peerings
  • BGP – Advertising NLRI
  • BGP – Cisco Routing Policy Mechanism

CCIE DC Written – 1.1.a Link Aggregation – Load Balancing

September 17, 2018 at 10:13 pm

Port Channels

The Cisco NX-OS software load balances traffic across all operational interfaces in a port channel by hashing the addresses in the frame to a numerical value that selects one of the links in the channel. Port channels provide load balancing by default. Port-channel load balancing uses MAC addresses, IP addresses, or Layer 4 port numbers to select the link. Port-channel load balancing uses either source or destination addresses or ports, or both source and destination addresses or ports.

You can configure the load-balancing mode to apply to all port channels that are configured on the entire device or on specified modules. The per-module configuration takes precedence over the load-balancing configuration for the entire device. You can configure one load-balancing mode for the entire device, a different mode for specified modules, and another mode for the other specified modules. You cannot configure the load-balancing method per port channel.

The default load-balancing mode for Layer 3 interfaces is the source and destination IP address (src-dst-ip), and the default load-balancing mode for non-IP traffic is the source and destination MAC address (src-dst-mac). Use the port-channel load-balance  command to set the load-balancing method among the interfaces in the channel-group bundle.

NOTE: F1-series modules do not support load balancing of non-IP traffic based on a MAC address. If ports on an F1-series module are used in a port channel and non-IP traffic is sent over the port channel, Layer 2 traffic might get out of order.

Here are the additional load balancing methods you can choose from:

  •  Destination MAC address
  • Source MAC address
  • Source and destination MAC address
  • Destination IP address
  • Source IP address
  • Source and destination IP address
  • Source TCP/UDP port number
  • Destination TCP/UDP port number
  • Source and destination TCP/UDP port number

Symmetric Hashing and Random Load Balancing

Here are a couple of other related topics you should be aware of:

Symmetric Hashing – To effectively monitor traffic on a port channel, it is essential that each interface connected to a port channel receives both forward and reverse traffic flows.

Normally, there is no guarantee that the forward and reverse traffic flows will use the same physical interface. However, when you enable symmetric hashing on the port channel, bidirectional traffic is forced to use the same physical interface and each physical interface in the port channel is effectively mapped to a set of flows. When symmetric hashing is enabled, the parameters used for hashing, such as the source and destination IP address, are normalized before they are entered into the hashing algorithm. This process ensures that when the parameters are reversed (the source on the forward traffic becomes the destination on the reverse traffic), the hash output is the same. Therefore, the same interface is chosen.

Random Load Balancing – Random load balancing on port channels is a software solution that enables better port-link bandwidth utilization for GPRS Tunneling Protocol (GTP) over IP-UDP packets. The existing M1, M2, F1, F2 and F2e line card hardware does not have the capability to perform random load balancing and hence, this software solution helps in load balancing and optimizing the port channels bandwidth. Random load balancing is supported only on F3 series line cards. Random load balancing is applicable on all types of traffic and is effective on egress ports of Layer 3 traffic. The Cisco NX-OS software does random load balancing of all traffic across all interfaces in a port channel by using polynomial scheme.

Exam 70-345: Microsoft Exchange Server 2016 Coming to CBT Nuggets!

September 13, 2018 at 9:27 pm

Exchange 2016

I have been supporting Microsoft Exchange environments since 1996. Finally, I get to teach it!

I will keep you posted here on my progress with this course at CBT Nuggets. It will be MANY videos covering the following areas:

  • Plan, Deploy, Manage, and Troubleshoot Mailbox Databases 
  • Plan, Deploy, Manage and Troubleshoot Client Access Services
  • Plan, Deploy, Manage, and Troubleshoot Transport Services
  • Plan, Deploy, and Manage Exchange Infrastructure, Recipients, and Security
  • Plan, Deploy, and Manage Compliance, Archiving, eDiscovery, and Auditing
  • Implement and Manage Coexistence, Hybrid Scenarios, Migration, and Federation

If you are looking for an exciting lab environment to go along with this course – I provide all the instructions and scripts that you need to spin up a scalable practice lab in Microsoft Azure!

I hope you are as excited for this new course as I am!