JunOS-Guru

Let's see why this virtual machine is called vMX.  It is a full-featured carrier-grade router that offers the same quality and features of the physical MX series platform.  The vMX provides complete control over forwarding ,and management planes. This software emulation of the MX hardware is executed down to the level of compiling the microcode of forwarding ASIC into x86 instructions.  This ensures that vMX packet handling and forwarding is identical to that of a physical MX router. Stay tuned for more information to be discussed on juniper certification preparation JNCIA-JUNOS. 

Hi everyone on today we are going to learn on vSRX Virtual Firewall. What is Virtual Firewall ? We can say that ,"it is like  packets for monitoring and controlling incoming and outgoing network traffic, based on predetermined security policy rules". A virtual firewall also does the same function; deployed as a software appliance, it provides network traffic filtering and monitoring for virtual machines (VMs) that are virtualized. A virtual firewall, almost like a physical firewall, works in conjunction with switches and servers to prevent unauthorized access of network or ex-filtration of data.  In this Junos OS it can also run as a virtual machine as we said above that using either VMware or kernal-based virtual machine (KVM) as the host software.  What do you meant by vSRX virtual firewall ? The vSXR virtual firewall delivers in a virtual machine, the Junos OS and SRX series advanced security for the branch SRX series devices. It prot...

On this particular day we are going to see on topic called SDN in Juniper. What is SDN ? SDN is a network software defined in networking term as Software Defined Networking. That this software do not run some Junos OS because there are group of designs made for juniper networking into cloud based solutions are made.  These are some products you need to know in juniper; NFX series are network services platform used in junos as customer premises equipment (CPE), that they are designed with these features : to provide very fast custom services  with delivery on demand they are secure on-premises can run and chains with multiple virtualisation network it functions simultaneously in an open environment   it also supports embedded vSRX security functionality Contrail Cloud it is just suite of products that enabling SDN does : network function virtualisation (NFV) and services done in cloud environment   it uti...

Hi everyone on today we are going to learn about JUNOS devices like Router , Switches and Security. We can tell that this new platform which are running the Junos OS to come in to many shapes in the livelihood of networking technologies and it's sizes are targeted for a number of developments in scenario we will be telling in cisco packet tracers. The platforms running in this Junos OS span with switching, routing and security as well as it is suited for a variety of network environment. For us all Junos OS provides as the heart of all platforms, which are consistent in end-to-end IP infrastructure in both small enterprise environments and it is the largest services provider networks. Now let's move on to routers in juniper JUNOS OS are; PTX series  MX series  ACX series  In PTX series in this the foundation of the IP transport architecture, PTX Series routers provide performance, optical transport integration, and elegant deployment. Th...

Today friends we are going to look over exception at traffic processing  is traffic that is destined for the local system. Unlike transit traffic, exception traffic does not pass through local device. It requires some for of special handling. Now let's see this simple example if you wanted to check if the router up, you would ping its loopback address. This would be regarded as Exception Traffic, as packets destined for a device requires additional processing by the Routing Engine (RE). Traffic that requires the generation of Internet Control Message Protocol (ICMP) messages. ICMP messages are sent to the packet’s source to report various error conditions and to respond to ping requests.  When we see some examples of ICMP errors include destination unreachable messages, which are sent when no entry is present in the forwarding table for the packet’s destination address, and time-to-live (TTL) expired messages, which are sent when a packet’s ...

On this session we will proceed to Transit Traffic Processing consists of all the traffic that enters an ingress (i.e., an action of going in or entering) a network port, it is compared against the forwarding table entries and it is finally forwarded out an egress (i.e., action of going out or leaving) the network port toward its destination.  A forwarding table entry for a destination must exist for the device running the Junos OS to successfully forward transit traffic to that destination. A Transit Traffic passes through the fo rwarding plane only and is never sent to or processed by the control plane only and it is never sent to or processed by the control plane. By processing transit traffic through the forwarding plane only, platforms running the Junos OS can achieve predictably high in performance rates. From the above image we can see that Transit Traffic can be both ; Unicast Multicast I n Unicast transit traffic which enters one ingress port and it is tra...

On this session we are going to learn about RE and PFE. Now lets look over Routing Engine (i.e., RE). Routing Engine  As we already discussed earlier, that RE is the brain of a platform and it is responsible for performing protocol updates and system management. 1. Routing Engine Intelligence Maintenance :  The RE handles all protocol processes in addition to other software processes that control the devices interface, the chassis components, system management, and user access to the devices. These software processes run fon top of the Junos kernel, which interacts with the PFE. The software directs all protocol traffic from the network to the RE for the required processing. 2. Chassis Monitoring and Control :  The RE provides in addition on the J-Web GUI. These user interface run on top of the Junos kernel and provides user access and control of the devices. 3. Packet Forwarding Engine Management :  RE controls the PFE by providing a...