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https://www.internetworks.in/2019/01/bgp-community-local-as.html?m=1

#cisco #ciscogateway #cisconetworking #ciscosecure #ciscosecurity #ciscocertification #ciscopartners #ciscocert #ccna #ccnacertification #ccnatraining #networksecurity #bgproducts #networkengineer #networkadministration #ccie #ccna #ccnp #networkinfrastructure #internetprotocol

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https://www.internetworks.in/2021/08/how-to-configure-ospf-stub-nssa-and.html?m=1

#cisco #ciscogateway #cisconetworking #ciscosecure #ciscosecurity #ciscocertification #ciscopartners #ciscocert #ccna #ccnacertification #ccnatraining #networksecurity #bgproducts #networkengineer #networkadministration #ccie #ccna #ccnp #networkinfrastructure #internetprotocol

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#cisco #ciscogateway #cisconetworking #ciscosecure #ciscosecurity #ciscocertification #ciscopartners #ciscocert #ccna #ccnacertification #ccnatraining #networksecurity #bgproducts #networkengineer #networkadministration #ccie #ccna #ccnp #networkinfrastructure #internetprotocol

[edgarcfrancis]

https://www.internetworks.in/2018/11/bgp-attributes.html?m=1

#cisco #ciscogateway #cisconetworking #ciscosecure #ciscosecurity #ciscocertification #ciscopartners #ciscocert #ccna #ccnacertification #ccnatraining #networksecurity #bgproducts #networkengineer #networkadministration #networkinfrastructure #internetprotocol

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Internet Protocol Security) IPSec is a set of protocols developed by the internet engineering Task Force (IETF). Internet protocol security (IPsec)  is a framework that helps us to protect our IP traffic on the network layer.

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Congestion management using Queuing

Congestion can occur at any point in the network where there are points of speed mismatches or aggregation, Speed mismatches are the most typical cause of congestion. when the packets traveling from LAN to WAN. Generally, a full hardware queue indicates interface congestion, and software queuing is used to manage it. The software queuing system can be selected and configured depending on the platform and cisco IOS version. Queuing manages congestion to provide bandwidth and delay guarantees.

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What is Quality Of Service (QOS)?

Quality of service models:

Best-effort service

Integrated services

Differentiated services

Best-effort service model

– the internet was initially based on a best-effort packet delivery service. Best-effort is the default mode for all traffic. There is no differentiation among types of traffic. The best-effort model is similar to using standard mail service – it will get there when it gets there.

Advantages of best-effort service model:

Highly scalable

No special mechanisms required

Disadvantages of best-effort service model:

No service guarantees

No service differentiation

What is Quality of Service (QOS)?

What is Modular Quality of service CLI (MQC)?

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

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

Integrated services (intserv model)

are a QoS model that is older than QOS / Differentiated services model. Intserv model defines a signaling process by which an individual flow can request that the network reserve the bandwidth and delay needed for the flow.

The integrated services model uses RSVP for reserving bandwidth. RSVP stands for a resource reservation protocol. RSVP  is used for reserving bandwidth/QOS tools for a particular flow. Here is a limitation of intserv model if reserved no other traffic can use it and it is not scalable each flow required separate admin configuration on the router.

The differentiated services model

is designed to overcome the limitation of best-effort and intserv models. In Diffserv model network traffic is identified by classes and network QOS policy enforces differentiated treatment of traffic classes. You choose the level of service for each class.

Advantages of Differentiated service model

:

Highly scalable

Many levels of quality are possible

Disadvantages of Differentiated service model:

No absolute service guarantee

Complex mechanisms