Booting Cisco Router From USB Flash We all know that cisco router and switch stores the IOS in flash. Flash is used like a hard drive. When we are booting the router, it loads the IOS file in to RAM from flash. Flash can be external or internal. It depends on hardware model. Sometime, Router… Read More »
Nexus Generic Online Diagnostics (GOLD) is used for verifying the health of nexus hardware and its components. By default, GOLD is enabled and auto runs when device boots up. We can also run it on demand without reboot the device. If any failure detects regarding a component or hardware then GOLD takes the action to… Read More »
Cisco Overlay Transport Virtualization (OTV) is use to connect two or more data centers and extends the VLANs over layer 3, using layer 2 DCI Data center interconnect. It is also called layer 2 VPN over IP. It supported over any kind of transport, such as point to point , MPLS , Internet , GRE… Read More »
Below is the Introduction to Virtual Extensible LAN – VXLAN. VXLAN ( Virtual Extended LAN ) is a replacement for traditional VLAN. Because VLAN can provide only maximum 4096 VLANs , due to VLAN ID field size of 12 bits. But VXLAN uses 24 bits for ID field. which is called VXLAN segment or VNI.… Read More »
We can create up to 10 checkpoints per VDC. Cisco nexus checkpoint is a temporary file that removes at the reload of device. It is use to create a temporary configuration file. which we can compare with running config , startup configuration file or with any checkpoint. as well as we can restore a checkpoint.… Read More »