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CCIE DC Written – 1.1.a Link Aggregation – vPC Components

September 24, 2018 at 1:17 am

virtual port channels

Virtual Port Channel master really does begin with a knowledge of the components that make them up. This post assumes you are familiar with the very basics of virtual port channels – knowledge you have gained through CCNA/CCNP Data Center.

Here are the components of the vPC:

  • vPC peers – two switches that act as a single logical switch to the downstream device.
  • vPC peer link – a link between the vPC peers that is used to synchronize state. Consider two physical links in a port channel. MAC address table synchronization, as well as other control plane, functions synchronize over this link.
  • Cisco Fabric Services – this protocol is responsible for synchronization between the peers. CFSoE is run. STP is modified to keep the peer link ports forwarding.
  • vPC peer keepalive link – Layer 3 communication link between the vPC peers to act as a secondary test of connectivity.
  • vPC – the virtual port channel depicts itself to the downstream device as a single logical switch. The downstream device does not need virtual port channel support. It forms its standard port channel configuration.
  • vPC member ports – a member of the vPC on the vPC peer switch.
  • vPC domain – a numeric identifier for the vPC domain.
  • Orphan device – a device that is connected to only one peer in the vPC.
  • Orphan port – the switchport that connects to an orphan device.
  • vPC VLANs – the VLANs permitted to use the vPC. They must be permitted on the peer link.
  • Non vPC VLANs – the VLANs not permitted on the vPC.

Congrats to SimonG on his CCIE Written!

September 24, 2018 at 12:13 am
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Wrapped the Latest BGP Module at CBT Nuggets Today!

September 21, 2018 at 7:39 pm

BGP

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

Live WebEx Meetup – Critical Lab Exam Strategies Part 1

September 21, 2018 at 7:12 pm
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A Sample AWS Implementation

September 20, 2018 at 7:34 pm

In this sample Nugget from the AWS Certified Cloud Practitioner course at CBT Nuggets – we examine an AWS solution and how it uses the various services.

Certified Cloud Practitioner