Free Tool Helps You Visualize and Understand YANG Models

All YANG Suite, all the time

Are you interested in automating the process of viewing operational data or configuring network devices remotely? YANG models are the foundation to automation and programmability for Cisco IOS XE devices. Not sure where to start? Cisco YANG Suite is a free tool to help understand and visualize Yet Another Next Generation (YANG) models ranging from standards-based models such as OpenConfig and IETF to Cisco native models. Start using YANG Suite today to become a programmability pro!

The previous releases of YANG Suite include the set of Core Plugins and support for NETCONF, RESTCONF, gNMI, and gRPC telemetry as well as a Python script generator for payloads created within YANG Suite. To simplify your programmability and automation journey, the third release introduces four additional features: gRPC Telemetry with TLS support, SNMP OID to YANG Xpath mapping, Ansible integrations and PIP installation.

Let’s dive into the new YANG Suite features included in the third major public release.

Secure gRPC Dial-Out using TLS

With increased security threats comes the need for secure telemetry. Now, YANG Suite provides support to upload the necessary certificates and keys to implement Transport Layer Security (TLS).

Simplify the SNMP to YANG Transition

Simple Network Management Protocol (SNMP) has been become a standard method to understand and work with network devices. However, the new approach is to use YANG models to remotely query network devices for operational data or to configure the devices. To facilitate the transition from SNMP to YANG, YANG Suite provides the option to add an object identifier (OID) and YANG Suite will perform an SNMPwalk to locate the corresponding Xpath. Additionally, you can validate that SNMP and the newly-found YANG model return the same data directly within YANG Suite—sweeeeet!

Replicate Custom YANG Payloads with Auto-Generated Ansible Playbooks

Quickly and easily generate an Ansible playbook for a NETCONF, RESTCONF, or gNMI payload built in YANG Suite. This can help you run your favorite payloads across multiple devices. All you need to do is build up a payload using our protocol of choice and select “Replays” and the “Generate ansible playbook” button. Now, sit back, relax and let YANG Suite generate Ansible playbooks for you.

Docker or Pip? You decide.

Previously, YANG Suite was accessible using Docker containers. Now, in addition to Docker, we can now install YANG Suite using PIP. Check out the examples below:

That’s a wrap!

With the third YANG Suite release, we introduce:

◉ gRPC Telemetry with TLS Support

◉ SNMP OID to YANG Xpath mapping

◉ Ansible integrations

◉ PIP installation

Source: cisco.com

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An Introduction to Understanding FFIEC Regulations

Regulatory requirements are a key operational concern that we hear about from our financial customers. As a key provider of technology for mission-critical financial system infrastructures across the globe, Cisco is held to the highest levels of scrutiny in the financial services regulatory audit chain. We have helped customers navigate the complex requirements and landscape to help keep them protected, when 100% of their business, relies on our equipment in the value chain.

A key challenge is managing iterations of infrastructure in global financial enterprises which have spanned 50+ years of digitization. These systems are continually being updated with newer and better ones; however, it takes a long time to sunset the legacy technology.  This leads to many generations of installed technology sets with diverse hardware and software systems, all that need to be tracked and managed, secured, and audited. Regular external examination is a necessary challenge to ensure hygiene of these systems are maintained amidst a backdrop of increasing cyber risk.

Streamlining the IT audit process

The Federal Financial Institutions Examination Council—or better known as the FFIEC—is a formal U.S. government interagency body charged with helping streamline the audit process. A number of our financial institution customers are regulated by multiple, and different, regulatory bodies. In the U.S. a few agencies include the Federal Reserve (FRB), the Federal Deposit Insurance Corporation (FDIC), the National Credit Union Administration (NCUA), the Office of the Comptroller (OCC), and the Consumer Financial Protection Bureau (CFPB). Without consistency, if every agency had their own examination criteria for assessment it would be exceptionally difficult for financial institutions to get work done.

To help streamline audit, the FFIEC as an interagency body, creates uniform principles, standards, and report forms for federal examinations of financial institutions. Having a consistent set of audit criteria and forms, a financial institution can have one audit that satisfies numerous federal regulatory agencies and keeps it a level regulatory playing field. The FFIEC’s scope is much broader than simply the IT aspects of digital financials, as it includes credit markets, fraud, BSA/AML, liquidity, and other areas of interest for regulatory bodies.

IT Governance in Financial Services

Over the next few weeks and months we’ll be contributing blogs that will focus on the FFIEC’s requirements in the information technology space, covering the below distinct areas:

◉ The Cybersecurity Maturity Assessment and how to use it

◉ The 2021 Updates in the Architecture, Infrastructure, and Operations book

    ◉ Hardware and Software Lifecycles

    ◉ Common Risk Management Topics: Architecture, Data, IT

    ◉ Infrastructure Management

    ◉ Operations and Operational Processes

◉ Cisco tools that can satisfy regulatory governance requirements

The goal for this series of blogs is to help the IT teams of financial institutions be aware of the regulatory concepts dealt with further upstream in an organization, and to promote tools that simplify the hardening of systems and streamlining audits.

Source: cisco.com

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Cisco 300-820 | CCNP Collaboration Exam Syllabus | Free CLCEI Practice Questions

Cisco CLCEI Exam Description:

The Implementing Cisco Collaboration Cloud and Edge Solutions v1.0 (CLCEI 300-820) exam is a 90-minute exam associated with the CCNP Collaboration and Cisco Certified Specialist - Collaboration Cloud & Edge Implementation certifications. This exam tests a candidate's knowledge of collaboration cloud and edge solutions, expressway configurations, Cisco WebEx Teams hybrid and emerging technologies. The course, Implementing Cisco Collaboration Cloud and Edge Solutions, helps candidates to prepare for this exam.

Cisco 300-820 Exam Overview:

• Exam Name- Implementing Cisco Collaboration Cloud and Edge Solutions
• Exam Number - 300-820 CLCEI
• Exam Price- $300 USD
• Duration- 90 minutes
• Number of Questions- 55-65
• Passing Score- Variable (750-850 / 1000 Approx.)
• Recommended Training- Implementing Cisco Collaboration Cloud and Edge Solutions (CLCEI)
• Exam Registration- PEARSON VUE
• Sample Questions- Cisco 300-820 Sample Questions
• Practice Exam- Cisco Certified Specialist Collaboration Cloud & Edge Implementation Practice Test

Related Articles:-

1. Cisco 300-820 CLCEI Exam: A Detailed Exam Preparation Guide
2. CCNP Collaboration 300-820 CLCEI Exam: Brief Description, Preparation Tips and Benefits

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ThousandEyes Looking at EchoLink

I’m working with a Cisco service called ThousandEyes. Now, the best application of ThousandEyes would be to spot problems, especially with cloud services. If you offer a service in the cloud and customers are complaining about performance, ThousandEyes can reveal where the bottlenecks exist. Then you can execute a plan of action to get the issues addressed. But, indulge me a moment to explain the excuse I’m using to play with it.

I recently passed my Amateur Radio exam to get licensed again after letting my Advanced license expire 30 years ago. Before I share my new call sign, here’s a note for the benefit of non-hams (ham is common lingo for an Amateur Radio operator). It is customary to use a standard phonetic alphabet when giving your call sign on the air. For example, WB2GJ would be Whiskey Bravo 2 Golf Juliet. But someone might say WB2 George Jetson just for fun. (If you recognize the name, you’re dating yourself. And no hams were doxed for this blog; there is no WB2GJ.)

I mention this because the FCC assigns KI5VDI as my new call sign. I didn’t think any call sign could be worse than the one I had in Colorado, KB0FU. Yeah, say that one out loud and you’ll get it. But KI5VDI? I just know someone will say or at least think “KI5 Venereal Disease Infection”. So, I purchase a vanity call sign similar to my original Advanced call sign, WB2EWS. I get N2EWS. That’s good news. I’m now cured of Venereal Disease Infection.

As a revitalized ham, I find myself listening to a conversation on 2 meters. (We hams refer to frequency ranges by their approximate wavelength. The 144-148 MHz frequency wavelength is about 2 meters.) People you speak with on the 2-meter band are generally very close by. These signals don’t travel far unless you have the opportunity to do something fancy pants like bounce your signal off a meteor. Even then, voice communication would be virtually impossible. So, I am shocked to hear a local Texan talking with someone in South Korea. How? Repeaters extend the range on 2 meters so your signals can jump over objects like mountains or tall buildings, but even a daisy chain of repeaters isn’t going to reach South Korea.

It turns out they are using EchoLink. This free software lets you link your radio to your computer and connect anywhere with VoIP. You talk on the radio, and EchoLink forwards everything to the remote location, typically the other person’s radio connected to EchoLink.

I download and install EchoLink to give it a try. Being a Cisco guy, the first thing I think about is how reliable VoIP will be with this software and EchoLink destinations. Network latency and jitter can be a problem for VoIP.

This is where ThousandEyes (finally) comes in. ThousandEyes analyzes network traffic in detail. Fair warning: This is not a typical reason for using ThousandEyes, and I’m using ICMP to simplify the test. Normally you would use TCP and a port to get a more realistic view. Unfortunately, EchoLink doesn’t like tests on its VoIP port. But even these simple ICMP results are very interesting.

I see that EchoLink chooses a server in San Diego for my connection (nasouth.echolink.org). When I use EchoLink for ham radio, I’ll use it on my personal PC. But I’m testing it on my work PC, which adds a level of complexity since I use a Meraki router on the Cisco network. I install a ThousandEyes agent on my work PC so I can test the network from my work PC to the EchoLink server. The agent isn’t working. What’s my boggle? The agent is a Chrome extension and I’m using Firefox. No problem. I switch to Chrome and be well.

I run the first test. The path visualization (see Figure 1) shows some interesting information. The blue dots are nodes that have ThousandEyes agents. When I click on a blue dot, it shows the node information. The empty circles with numbers are unidentified node hops. The number tells you how many unidentified hops there are in that chain. Not every node in the Interwebs is equipped for ThousandEyes, yet.

Figure 1: The path visualization from the work PC to the EchoLink server

The table view shows the latency and jitter. The jitter is higher than I expected, but it shouldn’t be a problem.

Figure 2: The latency and jitter of this connection

That is only half of an EchoLink connection, though. The other half would go from the contact in South Korea to the San Diego server. When you define a ThousandEyes test, you can pick multiple agents from anywhere in the world. I can even select multiple countries at a time for a single test. In this case, I only want one country, South Korea. But I can specify several South Korea nodes as starting points.

Figure 3: I don’t have the location of a user in South Korea, but I can check various ISPs

The table below shows that all but one source in South Korea have very low latency and jitter. But even the 3.2ms jitter is unlikely to be a problem.

Figure 4: Table of latency and jitter for each South Korea starting point

Now let’s look at the paths. There are enough hops to be an IPA recipe. The red lines are links between two nodes where the delay is greater than 100ms. It is entertaining to hover over the dots to see traffic details. In one case, for Google (gcp asia-northeast3), the first jump is from South Korea to Illinois! Azure koreacentral is the only starting point with a path that has no delays. Since none of the delays add up to a significant latency, as shown in the above table, the delays are unlikely to be significant when using EchoLink.

Figure 5: The paths from South Korea to EchoLink

Let’s try another location for Amber Heards and giggles. How about war-torn Ukraine? Surely this will show network problems.

Figure 6: Choosing starting locations in Ukraine

I see two IPv4 agents in Ukraine, one in Kyiv and the other in Kharkiv. Kyiv uses Deltahost Company. Kharkiv uses Ukrainian Internet Names Center LTD. The results (see Figure 7) are impressive for a war torn country. Check out Figure 8 for the paths. No delays and no dead ends. Do we have Elon Musk to thank for this? I click on a few blue dots and see that several nodes are through Cogent Communications.

Figure 7: Low latency and no jitter to speak of

Figure 8: The paths to freedom

Overall, EchoLink communications should work very well, even to Ukraine.

I’m impressed with ThousandEyes. As more routers become ThousandEyes agents, there should be fewer and fewer unidentified nodes in test results. I’ll keep experimenting and report whatever may be interesting.

Source: cisco.com

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Innovation at the inner core of Cisco DNA Center

Cisco DNA Center has seen several releases with significant innovation and the evolution of the product platform. With DNA Center capabilities aligned to Gartner’s four IT personas (AIOps, NetOps, SecOps, and DevOps), it is important to take a step back and look at the platform or networks-put the “underlay.”

With changes in the IT landscape, several megatrends are shaping what the network platform needs to deliver. With the new landscape where both applications and users are on the move, the face of the campus network has changed and expanded.

Figure 1. Megatrends shaping digital transformation

Cisco DNA Center Virtual Appliance, deployment flexibility

With applications moving to the cloud, it is no surprise that management platforms are moving to the cloud. Cisco DNA center is no exception. DNA Center is now able to run on AWS, and the deployment of the AWS VA takes under an hour from start to finish.   A lot of flexibility is also provided to the end user through the support of a launchpad to automate the installation or through a manual mode for users who already have a custom AWS environment. DNAC install is completely programmatic in both cases (no login to shell required!)

At this point, users can get on the Cisco DNA Center UI and begin configuration, discovery, and more.

Figure 2. Virtual Appliance Diagram

Following AWS, a VMWare version of the appliance will be released, allowing customers to use their existing VMWare infrastructure to run Cisco DNA Center instead of a physical appliance. As part of Cisco’s commitment to the platform, no matter how you deploy Cisco DNA Center, users will see feature parity it is the same Cisco DNA Center code and capabilities.

Hardened Security Features

Some verticals, industries, and organizations have specific security requirements mandated, such as FIPS.

Activation of FIPS compliance at Cisco DNA Center install time enables security features such as secure boot, TPM, session timeouts, and password expiration.  When data is shared using weak or deprecated ciphers, that data is at risk of being decrypted by malicious actors. Cisco DNA Center now supports FIPS 140-2-compliant cryptography modules, ensuring that only strong NIST-approved ciphers are used and enabling deployment in security-conscious verticals such as the public sector, finance, and healthcare.

Figure 3. FIPS compliance letter

ACL to management access for Cisco DNA Center appliance

By popular demand – many customers utilize ACL’s to control access to the network devices for management. As Cisco DNA Center is now the centralized monitoring and management point for network estate, customers can now create ACL’s to control what networks or IPs can access the Cisco DNA Center UI

Restricted shell support

Again by popular demand customers have requested to provide an enable shell for DNA Center so that sensitive CLI commands can be protected at all times. DNAC now comes with a restricted shell as standard and only non-invasive CLI is allowed to be run on the console. For any  CLI which requires root level / Sudo permissions, the shell will default deny it. A special token needs to be acquired to remove the restriction.

Scale – the agility to keep up with your business

Scale is a constant growth factor with post-pandemic life coming back to normal, with the proliferation of IoT and OT devices on the network on the rise. There is a constant need to ensure that the network management and orchestration platform can continue to scale with the network and business needs. With each release, Cisco DNA Center team has been making continuous strides with an increased platform scale. Recent scale updates for version 2.3.3 include up to 6,000 sites and 24,000 devices (Access Points and Network Devices for both Fabric and non-fabric networks).

Figure 4. DNA Scale

Remote support

As part of improving the support engagement between customers and TAC, at times providing TAC easy access to the equipment has contributed to extending the MTTR (Mean time to repair). To ease the process, customers are now able to allow TAC access to network equipment via Cisco DNA Center. This solution enables the customer to provide TAC-specific access to equipment and the ability to revoke access at any time.

Figure 5. Remote Support Activation

Aura (Audit & Upgrade Readiness Analyzer)

AURA stands for Audit & Upgrade Readiness Analyzer and performs various health, scale, and upgrade readiness checks for the Cisco DNA Center and the rest of the Fabric network. The tool is extremely simple to run and is executed on the Cisco DNA Center.

Figure 6. AURA screen image

The tool uses API calls, DB reads and CLI show commands (read-only operations) and hence, doesn’t affect performance or cause impact the Cisco DNA Center or the networking devices. This functionality was built in collaboration with Cisco DNA Center Escalation Engineering, Sales, and CX Centers TAC Engines team to ensure an efficient upgrade experience. AURA Tool Check Areas:

◉ DNA Center Scale Test

◉ DNA Center Infra Health

◉ DNA Center Assurance Health

◉ WLC/eWLC Assurance Health

◉ SDA Device CLI Capture

◉ SDA Control & Security Audit

◉ Software Bugs Causing Upgrade Failures

◉ Upgrade Readiness Checks

◉ SDA Compatibility Check (Switches, Wireless Controllers & ISE for 2.2.2.x)

◉ DNAC-ISE Integration Checks

◉ Fabric Devices Configurations Capture and Compare using inbuilt diff tool

Figure 7. System Analyzer screen image

Source: cisco.com

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Cisco Nexus: Connect cloud-scale performance and sustainability

Announcing the first Cisco 800G Nexus Switch

It’s the week of the Open Compute Project Global Summit a conference that attracts the biggest names representing cloud providers, colo-facilities, enterprises, telco service providers, media, and government entities, a group who build and operate high performance infrastructure. Our customers are here in force and we launched our blueprint for helping cloud service providers (both hyper scalers and webscale customers) deliver richer cloud applications and services, while balancing their needs for higher performance, cost effective, yet more efficient, hence more sustainable networking infrastructure.

For our Cloud Networking customers, 2022 turns out to be a block buster year. It was only in June that I wrote about exciting new 400G Nexus platforms. All of these are now shipping. This week I am proud to announce the addition of the first 800G Nexus product to the rich Nexus portfolio. The Nexus 9232E is a 1RU Nexus switch with 32ports of 800G.

So, what use case needs an 800G switch? I don’t think there is a dispute that the pace and scale of data center networking buildouts is accelerating. Two fun facts:

1. In 2011, the first year of the OCP event, the total volume of data created and stored in the world was just under two zettabytes. In 2022, that’s expected to grow to nearly 100 zettabytes.

2. Similarly, the number of users (by MAU or monthly active users) for Meta services, who was one of the founding members of OCP, grew from 845 million in 2011 to nearly 3 billion  today.

What is becoming clearer are the many use cases for AI/ML for both network operations team as well as application teams. AI/ML capabilities are crucial for digital twin type predictability of network change results as well as for modeling highly customized application outcomes in the real and meta world. Indeed, by 2025, 44 percent of global data created in the core and edge will be driven by analytics, artificial intelligence, and deep learning, and by an increasing number of IoT devices feeding data to the enterprise edge.

It is no wonder that our customers are actively looking for innovative solutions addressing their key questions:

◉ How do I handle traffic/ data growth while dealing with an increasingly challenging power/ power cost environment?

◉ Can I continue to scale this infrastructure but do so in a sensible, sustainable way?

◉ Can network bandwidth be utilized more efficiently while still supporting current cloud network deployments?

Cisco’s cloud networking difference

We are hard at work in solving these customer challenges. 800G technology is one of many steps on a journey.  Our customers want positive outcomes in the areas of experiences, economics, and environment with respect to their hybrid cloud network infrastructure. So, our new Nexus 800G product will deliver the same benefits that Nexus cloud networking customers already enjoy including:

◉ High Performance: Massive throughput with Silicon One 25.6T G100 ASIC and smart system design that will power the next generation of network innovations and breakthroughs.

◉ Flexibility and Agility: Choices in network operating systems, speed, form factors, optics to meet virtually any use case.

◉ Programmability: Enabled through open APIs and protocol support in our cloud network optimized OS.

◉ Density and Scale: For both fixed and modular systems offering scalability from 100G to 400G to now 800G.

◉ Energy Efficiency: Significantly improved power per bit leveraging 112G Serdes technology.

◉ Simplicity: Manageability, optics backward compatibility enabling less equipment needed to scale higher.

Source: cisco.com

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Vacations and IT Operations: Calm the Chaos

As I prepare to head out on summer vacation, I can’t help but realize that planning a vacation is a lot like managing IT operations. Both require coordinating a handful of individual tasks (from booking flights and reserving a hotel to deploying servers and resolving issues and more). Luckily, just as online travel services have made vacation planning easier, SaaS tools also make IT operations easier. In a series of blogs, I’ll explore this comparison to drive home the point that any IT shop still using multiple tools—or worse, trying to manually coordinate multiple tasks—can make their life much easier by using an integrated SaaS platform like Cisco Intersight for hybrid cloud operations.

From Manual Travel Management to Online Vacation Planning

The first recorded instance of a travel management service may be in 1840 when Thomas Cook organized rail transportation and lunch for 540 people. Five years later he was managing travel services for 165,000 people. All with a pen and ledger. Back then it was the model for success.

Let’s fast forward to the age of the internet. The internet not only wiped-out pens and ledgers through digital vacation planning, but it also made way for a more connected world that puts the power of integrated vacation planning at our fingertips.

Online Isn’t Good Enough

Imagine you’re planning a summer vacation for your family. Your first challenge is finding the best flights to your destination. There are 18 major airlines operating in the US plus more than 40 smaller ones. You’ll have to search each airline site for tickets. Doing this 18+ times to compare and find the best flights gets overwhelming quickly. I’ll just leave it there because when you multiply the effort to search for lodging, restaurants, and activities, it becomes clear that the internet alone isn’t the key to efficient vacation planning.

A flock of birds take synchronized flight off the beach in Destin, FL.

Integration is Key

But you’re smart. You know that all you have to do is log on to your favorite travel site, like Tripadvisor, Kayak, or a handful of others. Integrated travel sites aren’t just about booking your vacation. You can get alerts, track deals, make changes, and get support…all from your fingertips anywhere in the world. That’s the power of an integrated SaaS platform.

The Power of Integrated SaaS for IT Ops

Now let’s bring IT operations back in. Running IT operations requires juggling multiple tasks to plan, manage, and optimize outstanding experiences while managing risk and dependencies. This means deploying servers and apps, monitoring system health, identifying and resolving issues, managing critical dependencies, configuring profiles, and driving collaboration, to name just a few tasks. Then multiply these tasks across your on-prem, hybrid, and public cloud infrastructure.  It’s an incredibly complex and overwhelming responsibility with virtually no margin for error (somewhat like pleasing each family member who has a different view of the perfect vacation).

Simplify Hybrid Cloud Management with Cisco Intersight

What if there was an integrated IT operations platform that lets IT teams manage your hybrid cloud infrastructure in a few clicks from one place? There is! Cisco Intersight.

Like an integrated online travel service, Cisco Intersight:

◉ Integrates multiple tasks in one place:

    ◉ Deploy and troubleshoot your on-prem, public cloud, and edge environments, including physical servers, hypervisors, and VMs

    ◉ Evaluate workload and app performance and optimize in real time

    ◉ Build, deploy, and manage cloud-native Kubernetes clusters, and

    ◉ Provision on-prem resources for Infrastructure-as-Code deployments

◉ Provides value-added services:

    ◉ Customizing the dashboard to view your global inventory, fault monitoring, and firmware status

    ◉ Automating tasks for device configuration, OS installation, HCI cluster upgrades, K8 and infrastructure-as-code (IaC) deployments, and other routine tasks

    ◉ Creating and executing workflows across multiple infrastructure domains and cloud platforms

    ◉ Integrating with 3rd-party operations tools such as ServiceNow

    ◉ Automating workload placement, scaling, and capacity so workloads get the resources they need when they need them and you optimize spend

    ◉ Modeling capacity planning and migration scenarios to reduce risk and ensure predictable performance and cost

    ◉ Managing your entire infrastructure on the go from the Intersight mobile app

◉ Provides role-based experiences:

    ◉ Gives IT Ops a powerful tool to control every aspect of your environment and move faster with powerful automation capabilities

    ◉ Allows developers the agility and freedom they need to deploy applications even faster their own way – using the tools of their choice

Take Control

To wrap up, just like an online travel planning service lets you easily tame the many aspects of planning a vacation, Cisco Intersight helps you take control of your IT operations across your entire hybrid cloud environment. Intersight gives you one place to manage your on-premises, public cloud, and edge locations and all types of workloads (bare metal, VMs, K8s, and serverless). Its services make common IT operations tasks easier, give your DevOps teams the agility they need, and help you stay ahead of issues to optimize performance and costs.

Source: cisco.com

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