This post covers a non-best practice design for the Management Network in Cisco ACI (Application Centric Infrastructure). The implementation of Management In-band instead of the recommended Management Out-Of-Band (OOB). An OOB network increases the odds that you will be able
EVPN/MPLS vs VPLS
The following table shows a comparison of some key points for EVPN/MPLS and VPLS: Feature EVPN/MPLS VPLS Use MPLS Transport Yes Yes Protocol Evolution (Design Life) Next Generation Legacy MPLS Fast Reroute (FRR) < 50ms Yes Yes L2 Stretching Yes
Becoming a CCIE: What I have learnt
I would like to share my experience of becoming CCIE Routing and Switching v5 certified. It is kind of a “tradition” to do it and I think it can be very helpful to other people pursuing the same goal. Different
NAT: IPsec DMVPN and Internet Access – Review NAT Deployment scenarios
Contents Network Topology Network Address Translation (NAT) Overview What is Inside and Outside? NAT and Routing – Order of Operations Initial Configuration Scenario 1 – PAT, IPsec DMVPN and Internet Access Scenario 2 – Basic Static NAT Translation Scenario 3
Multicast – Inter AS Multicast (Auto-RP and BSR), Anycast RP MSDP, MSDP SA Filter and MBGP
Contents AS65001 Physical Topology AS65001 Multicast Topology – Auto RP User 1 Joins 224.1.1.1 Server1 sends Multicast Traffic to 224.1.1.1 Building the Shortest-Path Tree (SPT) Designated Router (DR) Election PIM Assert Mechanism – Forwarder Election AS65002 Physical Topology AS65002 Multicast Topology
IPsec: Crypto Maps, GRE and VTI
Contents Topology Description Crypto Maps GRE over IPsec with Crypto Maps Fragmentation GRE over IPsec with IPsec Profile Fragmentation Virtual Tunnel Interface (VTI) Fragmentation Configuration Summary Topology Description Internet Protocol Security (IPsec) is a standard based security framework
MPLS and BGP Multipath, Prefix Independent Convergence (PIC) and Best External
Contents Network Diagrams Physical Topology IP Addressing and Customer IGP/BGP Topology MPLS, BGP VPNv4, VRF and Redistribution Topology BGP Multipath – BGP VPNv4 Full Mesh BGP Multipath – iBGP BGP Multipath – eiBGP BGP Multipath – BGP VPNv4 Route Reflector
Scalable EIGRP Designs – Convergence Optimizations
Contents Topology EIGRP Convergence Process Overview Feasible Successors and Feasibility Condition Query Domain and Query Propagation Features to improve EIGRP Convergence Time Feasible Successor Loop Free Alternate Fast Reroute (LFA FRR) Network Summarization Route filtering Stub Router Different EIGRP AS
OSPF Forward Address – Case Studies
Contents Topology. OSPF Topology. OSPF Forward Address Type 5 LSA. OSPF Forward Address Type 7 LSA. Case of Study 1 – Cost change. Case of Study 2 – Configure the Translator Role. Case of Study 3 – Clear Forward Address.
OSPF Forward Address – Database Overview
Contents Topology. OSPF Topology. OSPF Database Overview. Type 1 LSA – Router LSA. Type 2 LSA – Network LSA. Type 3 LSA – Summary LSA. Type 4 LSA – Summary ASBR LSA. Type 5 LSA – Autonomous system External LSA.