DMVPN or Dynamic Multipoint Virtual Private Network is a tunneling protocol, which helps to build scalable IPsec Virtual Private Networks (VPNs). In this lesson, we will learn to configure DMVPN on Cisco router with single HUB. DMVPN is combine of- mGRE (Multipoint GRE allows a single interface to support multiple […]
vPC failure scenarios are sometimes destructive. However, if you have good understanding on vPC and you follow Cisco recommended vPC design, then you can handle Virtual Port Channel (vPC) failure scenarios with confidence. In this lesson, i will be discussing different vPC Failure Scenarios, it’s impact on the network and
Virtual port channel (vPC) typically used for providing active-active connection from switch to end-point devices. However, due to it provide loop free design, we can configure one vPC domain on aggregation switches to other vPC domain on access switches while it providing more bandwidth for access switches to aggregation switches.
Q-in-Q Tunneling is to allow service providers or hosting provider or data center, 4096 VLAN inside of each one of 4096 VLAN. This is really useful and easy to implement. Before going to the configuration part, let’s discuss the benefits of q-in-q tunnel. Service providers often meet the requirement for
In this lesson, we will learn to configure TACACS server for AAA authentication in Cisco IOS XR software. We will be using release 7.0.x for this tutorial. So, let’s get started. Here important to note that, AAA is available by default as a part of the base software package in
If you are unable to start a session with network-admin privileges in your Cisco Nexus switch, you must recover the network administrator password by power cycling the device. In this lesson, we will learn Nexus switch password recovery by power cycling. This processed are applicable for all NX-OS enabled devices.
Errdisable recovery is a feature that helps network administrators to recover the err-disabled state to enable state. In this lesson we will learn, how to configure Err-disabled auto-recovery in Cisco catalyst switches. Before going into details, first we should understand what is error-disabled state of an interface. Errdisabled is a
Managing MAC address table in Cisco is the most basic but important skill. In this lesson we will discuss in details about it. A Switch manage and use a mac address table to forward traffic from one interface to another. This address table is a combination of Vlan ID, MAC
