Edgar C Francis – Medium

Edgar C Francis

Edgar C Francis

What is DMVPN (Dynamic Multipoint VPN), NHRP, mGRE, and How to configure DMVPN Phase 1?

DMVPN (Dynamic Multipoint VPN) Introduced by Cisco in late 2000 is a routing technology you can use to build a VPN network with multiple…

6 min readMar 23, 2024

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What is DMVPN (Dynamic Multipoint VPN), NHRP, mGRE, and How to configure DMVPN Phase 1?

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Edgar C Francis

What is Network Tunneling and how to configure Generic Routing Encapsulation (GRE) Tunnels?

Generic Routing Encapsulation (GRE) is a network tunneling protocol developed by Cisco Systems that can encapsulate a wide variety of…

2 min readMar 23, 2024

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What is Network Tunneling and how to configure Generic Routing Encapsulation (GRE) Tunnels?

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Edgar C Francis

What is Classification and marking? What is IP Precedence and DSCP Values? What are AF and EF?

Classification and Marking

4 min readDec 3, 2023

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What is Classification and marking? What is IP Precedence and DSCP Values? What are AF and EF?

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Edgar C Francis

What is NBAR (network- based application recognition), classification QOS How to configure NBAR?

When we implement Quality of Service (QoS) the first step is classification, by default our router does not care about what kind of IP…

7 min readDec 3, 2023

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What is NBAR (network- based application recognition), classification QOS How to configure NBAR?

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Edgar C Francis

What is the queue? How do software and hardware queues work? Congestion management using Queuing.

Routers use a queue to store traffic until it can be processed or serialized. switches and router interfaces have ingress (inbound) queues…

2 min readDec 3, 2023

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What is the queue? How do software and hardware queues work? Congestion management using Queuing.

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Edgar C Francis

What are LLQ (Low Latency Queuing) and CBWFQ (Class-Based Weighted Fair Queuing)?

LLQ (Low Latency Queuing)

7 min readDec 3, 2023

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What are LLQ (Low Latency Queuing) and CBWFQ (Class-Based Weighted Fair Queuing)?

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Edgar C Francis

What is Modular Quality of Service CLI (MQC)?

Internetworks

6 min readDec 3, 2023

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What is Modular Quality of Service CLI (MQC)?

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Edgar C Francis

What is Weighted Random Early Detection? How to configure WRED?

Queuing mechanisms we have discus like LLQ are about managing the front of our queues. RED (Random Early Detection) is about managing the…

7 min readDec 3, 2023

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What is Weighted Random Early Detection? How to configure WRED?

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Edgar C Francis

What is DAI (Dynamic ARP Inspection)?

Dynamic ARP Inspection

10 min readNov 24, 2023

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What is DAI (Dynamic ARP Inspection)?

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Edgar C Francis

What is VTP Pruning? How to configure Cisco VTP pruning?

VTP pruning is used to improve the allocation and use of network bandwidth by reducing unnecessary traffic flood for example broadcast…

6 min readNov 24, 2023

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What is VTP Pruning? How to configure Cisco VTP pruning?

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Edgar C Francis

Edgar C Francis

I am a CCIE Technical Instructor/Network consultant. I am having experience ranging from operating and maintaining PCs and peripherals to network control

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