Configuring Cisco SRST and Enhanced Call Admission Control

Call control redundancy and Call Admission Control (CAC) are essential in a multisite Unified Collaboration deployment. This course teaches you how to configure remote site survivability, utilize CAC, and troubleshoot multisite deployment.
Course info
Level
Intermediate
Updated
May 30, 2018
Duration
2h 55m
Table of contents
Description
Course info
Level
Intermediate
Updated
May 30, 2018
Duration
2h 55m
Description

In today’s fast-paced world, the ability to communicate using real-time IP voice and video technology is a business necessity. In this course, Configuring Cisco SRST and Enhanced Call Admission Control, you will learn the step-by-step process of configuring remote-site router-based call survivability, implementing a remote dial-plan, and managing WAN bandwidth usage with various call admission control features - in plain terms. First, you will see how to configure SRST (Survivable Remote Site Telephony) for both SCCP and SIP phones on the remote site gateway. Next, you will learn how to configure the dial-plan on the remote gateway, utilizing dial-peers and translation profiles, to guarantee PSTN connectivity at the remote site and configure Call Forward Unregistered to ensure intersite connectivity with the main site. Then, you will explore how to optimize WAN link usage by determining codec selection and ensure call quality by configuring traditional location-based Call Admissions Control, as well as Enhanced Call Admissions Control. Finally, you’ll know how to troubleshoot call connectivity issues using RTMT and the Cisco IOS trace tools. When you’re finished with this course, you’ll have the skills and knowledge needed to configure an SRST redundancy solution, build a remote site dial-plan, manage bandwidth using CAC, and troubleshoot your multisite Cisco Collaboration deployment.

About the author
About the author

Sean Douglas has more than 17 years of experience working extensively with Cisco technology. He is a Cisco Systems Engineer that consults with a variety of clients to design, implement, and maintain their Cisco Collaboration solutions. Sean is CCNP in Routing and Switching, Wireless, and Collaboration.

More from the author
More courses by Sean Douglas
Section Introduction Transcripts
Section Introduction Transcripts

Course Overview
Hi everyone. I'm Sean Douglas, and welcome to my course, Configuring Cisco SRST and Enhanced Call Admission Control. I've been a Cisco engineer and instructor for nearly two decades. And in that time, I've taught thousands of adults IP networking, voice and video collaboration, and how to make their Cisco technology work for them. This course, which is part of an ongoing series, is designed to save you time and help you with configuring survivability, being prepared for the inevitable, how to use Cisco's location-based call admission control and enhance call admission control within your multisite collaboration environment. We want all of your calls to sound good, and that means planning and policy. This course with absolutely help you with both. We're going to give you extensive demonstrations, hands-on step-by- step configuration examples so that you'll be able to design, implement, and maintain a resilient collaboration solution that works, even when the pieces around it might not. There are a lot of different components that work together to provide survivability and functionality, and this course will make sure that you understand them all. By the end of this course, you'll no longer stay up late at night worrying about WAN outages and high bandwidth applications. You'll sleep great knowing that you're prepared and your network is ready to handle the unexpected. We've designed the course to have extensive hands-on examples so that you'll be able to reference our step-by-step demonstrations in your day-to-day career. Before beginning this course, you should have a basic understanding of Cisco Unified Communication Manager either by having watched the previous courses, Dial Plan for Cisco Collaboration, Building PSTN Gateways, SIP Trunks, and CUBEs, Basic Call Operation and Components for Cisco Collaboration, and Creating Cisco +E164 Dialplans for Multisite Deployments or being at about the CCNA collaboration level or having some experience working with Cisco Unified Communication Manager. I hope you'll join us as we build solutions with the Configuring Cisco SRST and Enhanced Call Admission Control course at Pluralsight.

Configuring Call Survivability with SRST and MGCP Fallback
You've got your Cisco Unified Communication Manager configured perfectly. All of your phones are registered. Everyone call make the calls they're supposed to make to the public switched telephone network, to other sites, to each other. And then it happens. There's a WAN outage, and it all breaks loose. Trouble tickets come rolling in. All of the sudden, most of the gateways aren't registered. Phones aren't working, and it seems like nothing works right. And everyone's looking at you, the Cisco Voice Administrator. Fortunately, you've taken this course, so you know exactly what to do before any of this even happened. You tell everyone it's okay, I got this, relax. Hi everyone, I'm Sean Douglas, and I want to welcome you to my course, Configuring Cisco SRST and Enhanced Call Admission Control. In this course, we're going to make sure that you're prepared to handle the unexpected. Our goals for this module are going to be to demonstrate how to configure redundancy for multisite deployments. We're going to show you the step-by-step configuration to turn on SRST, survivable remote site telephony, on our router and on our Cisco Unified Communication Manager. Once we've got SRST configured, we'll create a WAN outage to verify that our phones are still registered. But that's only the half of it. That just takes care of the phones. We're also going to set it up so that our MGCP gateway will still work when it can't talk to Unified Communication Manager. We're going to demonstrate how to configure MGCP fallback and then verify that our PSTN gateway is up, available, and functioning during a WAN outage. Being prepared means that when the inevitable happens, we're ready. We're going to show you how to do just that. I hope you'll join us as we configure SRST and MGCP fallback.

Configuring the Dial Plan to Support Call Survivability
In the previous module, we set up survivability for our phones and our PSTN gateway. When there's a WAN outage, gateways and phones at our remote sites are still going to work because they'll be registered to their local router. But just because they're registered doesn't mean that can send or receive calls. We've still got to configure the dial plan, and that's what up next. Hi everyone, I'm Sean Douglas. And in this module, Configuring the Dial Plan to Support Call Survivability, we're going to demonstrate the step-by-step configuration of setting up the dial plan on our SRST router and setting up Unified Communication Manager to support calls to our remote sites, even when there's a WAN outage. We've set up SRST and MGCP fallback in the previous module, and they allow the router to control the gateways and the endpoints when they can't reach Unified Communication Manager. But that's it. Now we've got to configure the dial plan, and that's exactly what we're going to do in this module. We're going to demonstrate the step-by-step configuration of setting up the SRST router with the dial plan, that means dial peers and translation profiles. We're also going to configure Cisco Unified Communication Manager, CUCM, to send and receive calls to the endpoints that are being controlled by our SRST router.

Configuring Bandwidth Management and Call Admission Control
We've demonstrated how to configure SRST so that during a WAN outage, we can keep our phones working and registered to their local router. Well, you'll be happy to hear that our WAN is up, and our phones are again registered to their Unified Communication Manager. But now we've got a new problem. Some of our phone calls are using too much WAN bandwidth, which is causing severe quality degradation. Our phone calls stink. We've got to fix that. Hi everyone, I'm Sean Douglas. In this module, Configuring Bandwidth Management and Call Admission Control, we're going to demonstrate how to configure regions and locations so that we can control codec in bandwidth. Here's what we're going to do to fix the hey man, sometimes my phone calls to other locations sound terrible problem that our end users are complaining about. We're going to demonstrate how to configure regions so that we can control codec selection. Then we'll demonstrate how to configure locations to provide CAC. Call admission control will reject calls if there's not enough bandwidth. And finally, we're going to demonstrate how to configure AAR, automated alternate routing, to provide PSTN backup to calls that are rejected because there's not enough bandwidth.

Configuring Enhanced Location Call Admission Control
Hi everyone, I'm Sean Douglas, and I want to welcome you to the module, Configuring Enhanced Location Call Admission Control. In the last module, we went old school and used traditional location- based call admission control. It works, but only in simple collaboration deployment models. Most of you are probably working in a much more complicated, much more demanding environment. You need something with a little bit more horse power. Well, we've got the ticket. In this module, I'm going to demonstrate how to configure enhanced call admission control. Our goals for this module are going to be to give you solutions. We're going to demonstrate the step-by-step process of configuring enhanced call admission control. Once we've got it configured, we'll demonstrate a variety of tools that'll let us analyze and verify our configuration. We'll use RTMT, Real-Time Monitoring Tool, and Unified Communication Manager's serviceability to examine how much bandwidth we're using in real time and how much bandwidth is available.

Troubleshooting SRST, MGCP Fallback, and Call Admission Control
You guys don't need me to tell you that, as collaboration admins, problems are going to happen all the time. Sometimes I think it's the job description, profession problem solver. Kind of like Schneider from One Day at a Time or the Men in Black. Well I'm neither one of those guys, I'm Sean Douglas. And welcome to the module Troubleshooting SRST, MGCP Fallback, and Call Admission Control. In this module, we're going to go through a series of exercises that will allow us to troubleshoot each of these issues. I've set these things up dozens, maybe hundreds, of times, and it always seems like something goes wrong. I use traces, debugs, Real-Time Monitoring Tool, Wireshark, whatever it takes to get the job done. And I'm going to show you some of the more common issues that I've had and what solutions I've used to solve the problems. Our goals for this module are going to be to chew bubblegum and solve problems, and we're all out of bubblegum. We're going to troubleshoot common issues that come up when you're configuring call survivability, SRST, and call admission control. We're going to go over some of the more common things that can go wrong when you're configuring SRST, survivable remote site telephony, MGCP fallback, enhanced call admission control where we're configuring bandwidth management over multiple clusters. There's a lot of things that can go wrong, but I believe that it always works every time if it's configured properly. And you need a plan. You need to be able to step into a situation and say okay, just the facts. What exactly is going on, and what exactly do I want to happen, and then we can figure out what's not working. What are the three to five steps that we need to configure to make this work? In this module, we're going to go over some of those steps for each of these scenarios.