Notes & Cheat Sheets

These pages are dedicated to a variety of technical documents – originating from study notes or on-the-job experience.

The current categorisation and content are somewhat ad hoc at the moment, however as time goes by and more documents are uploaded these pages should take on a more refined and structured layout. Categories are as follows:

• LAN & Enterprise: IGPs, Switching, Multicast, NAT, Firewall Security, SNMP, Link Aggregation, QoS
• WAN & Internet: eBGP, DNS, L2TP, Peering & Transit
• Data Centre & Hardware: Cabling & Connectivity, Device Hardware, Media Types, Data Centre Operations
• Service Provider Core: MPLS & LDP, Overlay & Tunnelling Technologies, High Availability, iBGP, Confederations, Route Reflection, Inter-AS MPLS Options, MPLS Traffic Engineering, Segment Routing
• Fundamentals & Certifications: Many of my study notes will typically cover topics that fall into multiple categories. As such the documents on this page will be one of the following two flavours:
  • Quick reference notes or guides covering a range of topics geared towards one particular certification.
  • More broad, fundamental topics (packet or protocol structures etc.)

IPv6 has been spread throughout all the categories rather than having a dedicated section.

Documents are in PDF format and can be download by clicking on its thumbnail image. See below for a full index of all documents or visit the page of a given category.

Document Index

LAN & Enterprise

• OSPF Stub Area Types
• OSPF LSA Types
• OSPF Security
• EIGRP Key Chains
• NAT Types
• IGMPv2 Queries, Reports and Timers
• IPv6 Router Solicitation/Advertisement Sequence and Address Resolution
• OSPF and EIGRP Neighborship Requirements
• Destination Multicast MAC Address Calculation
• Embedded RP in IPv6 Multicast
• Etherchannel
• Reading an SNMP MIB
• First Hop Redundancy Protocol
• Performing a debug on a Junos SRX
• Type of Service Byte – IP Precedence and DSCP

WAN & Internet

• BGP Path Control
• BGP Path Attribute Types
• DNS Basics
• L2TP Overview
• SSL Order of Operation
• local-as command

Data Centre & Hardware

• Media Types
• Aux to Console Setup

Service Provider Core

• VPLS, PBB, EVPN and VxLAN Diagrams
• Pseudowire Overview
• VRF Route Leaking using Import and Export maps
• SSO, GR, NSF and NSR
• BGP Route Dampening
• OSPF Sham Links
• Route Reflection Rules
• 6to4 Tunnelling
• Router Tables and Databases
• Inter-AS MPLS
• Carrier Supporting Carrier
• MPLS TE Database and RSVP Process
• MPLS DiffServ Tunnelling Models
• Segment Types
• Segment Routing – IGP Extensions
• Segment Routing – Automated Steering
• Segment Routing – On Demand Next Hop
• Segment Routing – Flexible Algorithm
• Segment Routing – Binding SIDs and the SRLB
• IS-IS Neighborships
• IS-IS MD5 Authentication
• LDP Basics

Fundamentals

• CCNA Study Notes
• CCNP Service Provider Study Requirements (legacy)
• TCP/IP vs OSI Comparison
• Packet Structure
• MTU between IOS and XR