Sunday, November 27, 2016

Cisco Datacenter: vPC ( Single and Double Sided vPC)

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Lets talk about the two different scenarios in Cisco Datacenter environment. The two different concept of vPC called single-sided vPC and Dual sided vPC.

vPC is the concept where vPC provides capabilities to build a loop free topology, it is also commonly used to interconnect two separate data centers together at layer 2, allowing extension of VLAN across the 2 sites

We have two different deployment scenarios for vPC in the datacenter as
  • In the single datacenter environment we can use Single-sided vPC (access layer or aggregation layer) or we can go with the scenario Double-sided vPC, also called multilayer vPC (access layer using vPC interconnected to aggregation layer using vPC)
  • In the multi datacenter environment we can have Multilayer vPC for Aggregation and DCI or we can have and Dual Layer 2 /Layer 3 Pod Interconnect.
let start discussion on every deployment methods

Single-Sided vPC: In single-sided vPC, access devices are directly dual-attached to pair of Cisco Nexus 7000 Series Switches forming the vPC domain

The access device can be anything like L2 switches, rack mount or blade servers , Load balancers, firewalls or any storage devices. The end device which is an access device will have to support the port-channel connection between them. The Bundling can be LACP mode active, LACP mode passive and static bundling- mode on. There are some recommendations using LACP protocol connecting to the vPC domains.
  • vPC with Cisco Nexus M1 Series module line-card: 16 active member ports (8 on peer device 1 and 8 on peer device 2)
  • vPC with Cisco Nexus F1/F2 Series module line card: 32 active member ports (16 on peer device 1 and 16 on peer device 2)

Double-Sided vPC: In Dual sided vPC where you have the two different vPC domain from distribution to Access layer parent switch and other vPC domain from parent access switch to the FEX devices you can say. vPC domain at the bottom is used for active/active connectivity from endpoint devices to network access layer. vPC domain at the top is used for active/active FHRP in the L2/L3 boundary aggregation layer

Benefits of double-sided vPC over single-sided vPC topology are listed below:
  • Enables a larger Layer 2 domain.
  • Provides a higher resilient architecture. In double-sided vPC, two access switches are connected to two aggregation switches whereas in single-sided vPC, one access switch is connected to two aggregation switches.
  • Provides more bandwidth from the access to aggregation layer. Using a Cisco Nexus F1 or F2 Series modules line card for vPC and Cisco Nexus 5000 Series Switches
we can further discuss on Multilayer vPC for Aggregation and DCI in another post. Keep connected and supported.

Sunday, July 17, 2016

Data Center :Cisco Nexus Leaf-Spine Architecture Nexus

#Cisco Datacenter
#CCIE Students
#ACI Technology ( SDN Architecture )
#Cisco 9K ACI Spine-leaf Architecture
#Cisco Advance Technology

Cisco comes with the ACI technology where cisco introduces Spine-Leaf architecture in the environment.

New Technology in data-center comes into picture in the form of spine-leaf topology where we can have the east west traffic to be propagate in the equidistance.

How Spine-leaf topology describe, lets have a look below.

Starting for the Spine-Leaf Topology:-
Spine-Leaf topologies are based at the near community structure. The time period originates from Charles Clos at Bell Laboratories, who posted a paper in 1953 describing a mathematical theory of a multi pathing, non-blockading, more than one-level community topology wherein to replace smartphone calls.

These days, Clos’ original thoughts on layout are implemented to the modern spine-Leaf topology. spine-leaf is typically deployed as two layers: spines (like an aggregation layer), and leaves (like an get right of entry to layer). spine-leaf topologies provide excessive-bandwidth, low-latency, non-blocking server-to-server connectivity.

Fig 1.1 Spine-Leaf Structure (Networks-Baseline )
Fig 1.1 Spine-Leaf Structure (Networks-Baseline )

What it makes the difference:-
Leaf (aggregation) switches are what offer devices get entry  to the material (the network of spine and Leaf switches) and are generally deployed on the top of the rack. typically, gadgets connect with the Leaf switches. gadgets may include servers, Layer four - 7 services (firewalls and cargo balancers), and WAN or net routers. Leaf switches do not connect with different leaf switches (until jogging vPC in standalone NX-OS mode). however, each leaf should hook up with each spine in a full mesh. some ports on the leaf can be used for cease devices (commonly 10 Gigabits), and some ports might be used for the spine connections (commonly forty Gigabits).

Fig 1.2 Stages of the Leaf-Spine Network( Networks-baseline)
Fig 1.2 Stages of the Leaf-Spine Network( Networks-baseline)

Spine Topology:-
Spine (aggregation) switches are used to hook up with all Leaf switches, and are typically deployed at the stop or middle of the row. spine switches do not connect with different backbone switches. Spines function backbone interconnects for Leaf switches. typically, spines best connect with leaves, but when integrating a Cisco Nexus 9000 transfer into an current surroundings it's miles perfectly applicable to connect other switches, services, or devices to the spines.
All devices connected to the cloth are an same range of hops away from one another. This gives you predictable latency and high bandwidth among servers. The diagram in determine 6 indicates a easy two-tier design.

Fig 1.3 Design in Data-center ( Networks-Baseline )
Fig 1.3 Design in Data-center ( Networks-Baseline )

How we achieve this:-
With Leaf-spine configurations, all gadgets are exactly the equal quantity of segments away and comprise a predictable and consistent quantity of put off or latency for touring statistics. this is possible because of the brand new topology design that has best two layers, the Leaf layer and backbone layer. The Leaf layer includes access switches that connect with devices like servers, firewalls, load balancers, and side routers. The backbone layer which is called as spine (made of switches that perform routing) is the spine of the network, where each Leaf switch is interconnected with each and each backbone transfer.

Fig 1.4 Layer 3 Spine-Leaf Fabric
Fig 1.4 Layer 3 Spine-Leaf Fabric

To allow for the predictable distance between devices on this -layered design, dynamic Layer three routing is used to interconnect the layers. Dynamic routing allows the exceptional direction to be determined and altered primarily based on responses to community trade. This type of network is for records center architectures with a focal point on “East-West” network site visitors. “East-West” visitors carries information designed to travel within the statistics middle itself and now not outdoor to a one-of-a-kind site or network.  This new method is a method to the intrinsic barriers of Spanning Tree with the capacity to utilize different networking protocols and methodologies to obtain a dynamic community.
Fig 1.5 Core Fabric ( Networks-Baseline)
Fig 1.5 Core Fabric ( Networks-Baseline)

 Rest of the Story:-
With Leaf-spine, the network makes use of Layer three routing. All routes are configured in an active country via using identical-value Multipath (ECMP). This lets in all connections to be applied on the equal time while still last solid and averting loops within the network. With traditional Layer 2 switching protocols like Spanning Tree on three-tiered networks, it ought to be configured on all devices efficaciously and all the assumptions that Spanning Tree Protocol (STP) is predicated on need to be taken into account (one of the smooth errors to make when configuring STP is with mislabeling device priorities that could lead to an inefficient route setup). The removal of STP between the get entry to and Aggregation layers in lieu of Layer three routing consequences in a miles greater strong surroundings.

Every other gain is the convenience of adding additional hardware and capability. when oversubscription of links occurs (which means that more visitors is generated than may be aggregated onto the lively link at one time), the capacity to make bigger potential is simple. an additional spine switch may be added and uplinks can be prolonged to each Leaf transfer, ensuing inside the addition of interlayer bandwidth and reduction of the oversubscription. whilst device port potential turns into an issue, a new Leaf switch may be added by way of connecting it to each spine and adding the community configuration to the switch. the convenience of growth optimizes the IT department’s procedure of scaling the community with out dealing with or disrupting the Layer 2 switching protocols.

Leaf-Spine Worries:

The alternative principal drawback comes from the use of Layer three routing. This eliminates the spanning of VLANs (digital LAN) throughout a network. VLANs in a Leaf-spine network are localized to each person Leaf switch; any VLAN segments which are left on a Leaf switch are not reachable through the alternative Leafs. this could create troubles with a scenario inclusive of guest virtual system mobility inside a statistics middle.

Leaf-Spine Cases:
web scale packages where server area within the network is static could benefit from the implementation of Leaf-backbone. the use of Layer 3 routing among layers of the structure does no longer avoid net scale programs because they do not require server mobility. The removal of Spanning Tree Protocol (STP) results in a greater stable and dependable community overall performance of East-West traffic flows. Scalability of the structure is likewise improved.

Organization packages leveraging cellular digital machines (e.g. vMotion) create an trouble while a server wishes to be supportable anywhere inside the records middle.  the use of Layer three routing and shortage of VLANs extending among Leafs breaks this requirement.  To paintings round this trouble, an answer such as software program defined Networking (SDN) may be employed, which creates a virtual Layer 2 above/on pinnacle of the Leaf-backbone network.  This lets in servers to transport around in the environment with impunity at no detriment to “East-West” overall performance, scalability, and stability attributes of a Leaf-backbone community topology.  greater info round SDN may be mentioned in a future blog article

Tuesday, July 5, 2016

Welcome to New Technology: IoT ( Internet Of Things )

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#Advance Network Technologies
# Advance Automation
#IOT Basics and implementation
# Systems Engineer - IOT tech
# Use cases of IOT will be introduced

IOT is the new technology where we automated the various appliances may be electronic and electric to make this world better. lets have a look on IOT technology below.

A aspect, within the net of things, can be someone with a heart monitor implant, a farm animal with a biochip transponder, an car that has built-in sensors to alert the driver whilst tire pressure is low -- or every other natural or guy-made item that can be assigned an IP address and provided with the capacity to switch facts over a network.

The IoT permits objects to be sensed and managed remotely across current network infrastructure, developing opportunities for extra direct integration of the physical global into pc-based totally systems, and resulting in improved efficiency, accuracy and financial advantage.

IOT Basics
Fig 1.1 IOT Basics ( Networks-Baseline)

in addition to the growth of net-connected automation into a plethora of latest utility regions, IoT is likewise anticipated to generate huge quantities of statistics from numerous locations, with the consequent necessity for quick aggregation of the facts, and an boom in the need to index, store, and procedure such information extra efficiently. IoT is one of the structures of modern smart town, and smart strength management structures

Examples of objects that can fall into the scope of internet of things consist of related safety structures, thermostats, cars, digital appliances, lights in family and industrial environments, alarm clocks, speaker systems, merchandising machines and more.

Fig 1.2 Stacks of IOT ( Networks-baseline)
Fig 1.2 Stacks of IOT ( Networks-baseline)

Companies can leverage IoT packages to automate safety tasks (as an example, notify authorities when a fire extinguisher in the building is blocked) to appearing real-global A/B trying out using networked cameras and sensors to stumble on how clients have interaction with products. corporations recognition on getting products to the marketplace faster, adapting to regulatory requirements, growing efficiency, and most importantly, persisting to innovate. With a exceptionally mobile team of workers, evolving consumer, and changing deliver chain demand, the IoT can move your corporation forward, beginning today.

The Results: Measurable Business Outcomes

After the initial implementation turned into finished, direct cost blessings became right away obvious. at the router production line, overall device effectiveness (OEE) accelerated via 24 percent, and large fee financial savings are already envisioned just for one line due to the fact exertions needs are more honestly defined. in keeping with Mike Amaya, plant supervisor, Reynosa Operations, “The RTLS solution enables us hold throughput in the line, which lets in us to hit our manufacturing objectives on time. Any bottlenecks in fabric glide immediately get diagnosed and addressed.”

With greater accurate work in method facts than ever earlier than, Stanley Black & Decker’s Reynosa plant can keep its materials and components stock as little as viable and consequently decrease the fees associated with housing and dealing with that stock. specified facts and visibility around inventory also imply Stanley Black & Decker gives more carrier to clients by using offering accurate transport schedules. due to the fact the agency can confidently discover the status and vicinity of its stock and merchandise, customers also gain specific insight into the fame in their orders.
greater visibility into labor hours has delivered a higher information of the way employees, the organization's greatest asset, are being applied. As a end result, the plant has finished an anticipated 10 percent greater hard work performance and higher use of labor critical resources, enhancing usage prices from 80 percentage to ninety percent.

Amaya describes the advantages IoT has furnished: “we have products and machines talking to the internet, and we're able to monitor and manage manufacturing almost robotically.” similarly, the solution has ended in great enhancements (first-time bypass defects according to million possibilities, or DPMO, were reduced sixteen%) and in faster selection making and response time. Amaya keeps, “Supervisors can now react extra quick because they get notifications of troubles a great deal in advance. The advanced visibility manner you may examine traits and cloth waft and connect any problems inside the middle of the shift.”

The wireless-enabled RTLS solution has in reality elevated facts sharing, pushed operational efficiency for Reynosa, and supplied managers with the information had to preserve now not just to reduce expenses, but also to maximize manufacturing and accelerate time to market.

Juniper Routers and Specifications- Short & Simple

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#Juniper Routers
#Juniper Students
#Juniper Models
#JNCIA Students

There are some of the Juniper routers whose description is explained below so that we can used the routers as per the design requirement.

You can have the various Juniper routers which can be used by its performance bandwidth requirements and all.

Have a look below for all the juniper models to use in the real live network.

J2320 Features:
Juniper J2320 can have the performance till 600 Mbps and have 3 modular interface slots

• Up to 600 Mbps performance
• Four built-in Gigabit Ethernet ports
• Three modular interface slots that support a variety of WAN, LAN, and services options
• Ideal for one or two broadband, T1, or E1 interfaces with integrated services
Below is the picture of J2320 Juniper Router

Fig 1.1 Juniper J2320
Fig 1.1 Juniper J2320

J2350 Features
Juniper J2350 can have the performance till 750 Mbps and have 5 modular interface slots

• Up to 750 Mbps performance
• Four built-in Gigabit Ethernet ports
• Five modular interface slots that support a variety of WAN, LAN, and services options
• Ideal for multiple broadband, T1, or E1 interfaces with multiple integrated services

Below is the picture of J2350 Juniper Router

J2350 Features
J2350 Features

J4350 Features
Juniper J4350 can have the performance till 1 Gbps and have 6 modular interface slots

• Up to 1 Gbps performance
• Four built-in Gigabit Ethernet ports
• Six modular interface slots that support a variety of WAN, LAN, and services options. Two of these slots are enhanced-performance slots that provide additional performance to multiple Gigabit Ethernet configurations.
• Ideal for DS3, E3, and Metro Ethernet interfaces with integrated services

Below is the picture of J4350 Juniper Router

J4350 Features
J4350 Features

J6350 Features
Juniper J63500 can have the performance till 2 Gbps and have 6 modular interface slots

• Up to 2 Gbps performance
• Four built-in Gigabit Ethernet ports
• Six modular interface slots that support a variety of WAN, LAN, and services options. Four of these slots are enhanced performance slots that provide additional performance to multiple Gigabit Ethernet configurations.
• Ideal for multiple DS3, E3 and Metro Ethernet interfaces with integrated services
• Optional redundant power supplies for high system availability
Below is the picture of J6350 Juniper Router

J6350 Features
J6350 Features

M7i Features
Juniper M7i can have the performance till 1 Gbps and have 4 PIC interface slots

• Up to 1-Gigabit Ethernet/OC-12 WAN performance
• Four PIC slots and built-in 2x Fast Ethernet or Gigabit Ethernet links
• Forwarding Engine Board (FEB) with built-in services module
Below is the picture of M7i Juniper Router

M7i Features
M7i Features

M10i Features

• Complete redundancy with dual routing engines, dual forwarding engines, and dual power supplies; redundancy provided with graceful Routing Engine switchover (GRES)
• Up to OC-48/STM-16 WAN performance
• Eight PIC slots for a variety of LAN, WAN, and services PICs

Below is the picture of M10i Juniper Router

M10i Features
M10i Features

M120 Features

• 120-gigabit throughput in compact form factor; supports 10-gigabit links at line rate
• Complete in-box redundancy with dual routing engines, 1:1 and N:1 redundancy of forwarding engines, dual switch fabrics, and dual power supplies
• Two slots for 10-Gigabit Ethernet or OC-192; 16 PIC slots for a variety of LAN, WAN and service PICs
Below is the picture of M120 Juniper Router

M120 Features
M120 Features

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