راه اندازی DMVPN بروی 3 روتر با استفاده از GRE Tunnle و Ipsec

پیکربندی DMVPN  

Dynamic Multipoint VPN (DMVPN) Configuration

DMVPN (Dynamic Multipoint VPN) is a technique where we use multipoint GRE tunnels instead of GRE point-to-point tunneling. These multipoint GRE tunnels will be encrypted using IPSEC so that we have a secure scalable tunneling solution. If you are unfamiliar with tunneling or IPSEC I highly recommend to check the basic configuration for GRE first and how to configure an encrypted GRE tunnel with IPSEC. Having said that let’s look at the configuration of DMVPN. This is the topology that we will use:

Let me explain this topology to you:

انتقال VM به Datastore دیگر در VMWare ESXi 5

انتقال VM به Datastore دیگر در VMWare ESXi 5

In this tutorial I will demonstrate how you can move your virtual machine from one datastore on another using VMWare ESX 5 using the Vsphere client. Before you start make sure that the virtual machine that you want to move has been powered off.

In my example I have two datastores, one of 300 GB and the other one is 600 GB. I want to move a VM from the 600 GB drive to the 300 GB drive.

Click on your ESXi host and select Configuration > Datastore where your VM is located and click on Browse Datastore.

 

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مثالی برای راه اندازی VSS و پیکربندی های آن با سویچ 6500

The Virtual Switching System (VSS) allows two Cisco Catalyst 6500 or 4500 chassis to bond together so that is seen as a single virtual swich to the rest of the network. Other devices will see the VSS configured 6500 as a single device which means it’s possible to use multi chassis etherchannel and protocols like spanning-tree will only see a single switch.

Some other features are NSF (Non Stop Forwarding) / SSO (Stateful Switchover) which means that when a single chassis fails the other one will take over without any downtime since the routing table / CEF table etc. are stored in both chassis’ supervisors.

Another cool feature is EFSU (Enhanced Fast Software Upgrade) which allows you to upgrade the IOS version without any downtime.

In this tutorial I will be using two Cisco Catalyst 6504 switches with 720-10G VSS supervisors to show you how to configure VSS and verify that it’s working.

 

فایل آموزش CCNA R&S ورژن 2012

دو لینک زیر مربوط به دوره های ICND 1 و ICND 2 نسخه 2012 می باشد که آخرین تغییرات این دوره ها در آن اعمال شده است.

2012 - CCENT-CCNA - ICND1 640-822 -Third Edition .rar - 7.6 MB

2012 - CCENT-CCNA - ICND2 640-816 -Third Edition .rar - 8.4 MB

تغییر محدودیت تعداد دفعات join شدن به دامین برای نام های کاربری

تغییر محدودیت تعداد دفعات join شدن به دامین برای نام های کاربری

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SUMMARY

By default, Windows 2000 allows authenticated users to join ten machine accounts to the domain. If a user attempts to join an eleventh machine account, the error messages listed in the following Microsoft Knowledge Base Article are displayed:

251335 Domain users cannot join workstation or server to a domain

This default was implemented to prevent misuse, but can be overridden by an administrator by making a change to an object in Active Directory.

Note that users in the Administrators or Domain Administrators groups, and those users who have delegated permissions on containers in Active Directory to create and delete computer accounts, are not restricted by this limitation

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