JUNOS FOR IOS ENGINEERS PDF
Day One: Junos for IOS Engineers addresses the needs of the IOS-trained engineer by providing a side-by-side comparison of configurations and techniques in. Day One: Junos QoS for IOS Engineers addresses the needs of the IOS-trained engineer . Download a free PDF edition at resourceone.info Note that Nook, iPad, and various Android apps can also view PDF files. This is a book to help IOS Engineers administer Juniper devices in a single day.
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Download as PDF, TXT or read online from Scribd .. Hồ Vũ Anh Tuấn Day One: Junos for IOS Engineers To Configure SSHv2 in IOS To Configure SSHv2 in. Editorial Reviews. From the Author. The primary goal for this book is that the reader gains an understanding of the logical way in which Junos is configured, and. Throughout and early , all the Juniper engineering teams worked For those of you who are familiar with Cisco IOS or other routers, you will find the.
In their use case, network automation is the key to their competitive advantage. The difference between a service provider's network needs compared to a cloud data center is that, traditionally, service providers aggregate more services into a single device.
CCNA and then JNCIA
A good example would be Multiprotocol Label Switching MPLS that almost all major service providers provide but rarely adapt in the enterprise or data center networks. Juniper has identified this need and excelled at fulfilling the service provider requirements of automating. This article will take you through some of Juniper's automation APIs.
Juniper networks contributed heavily to both of the RFC standards. In fact, Juniper was the sole author for RFC Therefore, in the case of HTTP s as the transport, the URL endpoint is identical while the operation intended is specified in the body of the request.
It is conceptually based on layers from top to bottom. Starting with ncclient 0. Start with some new imports for constructing new XML elements and the connection manager object:!
These are the normal best practice steps lock, configure, unlock, commit for Juniper configuration changes: send, validate, and commit config conn. Juniper also provides a Python library to be used with their devices called PyEZ.
Juniper maintains a comprehensive Junos PyEZ developer guide on their technical library. If you are interested in using PyEZ, it ishighly recommended that you at least take a glance through the various topics in the guide. Installation and preparation The installation instructions for each of the operating systems can be found on the Installing Junos PyEZ page.
Lets see how the two OSes compare.
Erase flash: before copying? Erasing the flash filesystem will remove all files! OK 0xAC8A bytes copied in Thanks to its FreeBSD roots, moving the software package to a router is very simple.
Conclusion Are you getting used to the change of appearance between the two OSes? Remember that you can use display set after show configuration in Junos to show Junos is similar to something you might be used to. Unfortunately, IOS does not have a reciprical to display Junos hierarchy. Okay, these were basic concepts that you can now build upon in the coming chapters.
Shiyu Meng on JUNOS Routing with IOS: Practical Juniper Networks and Cisco Systems
You opened the Juniper device, established user accounts, and even upgraded the software. Now, lets do a basic configuration walk-through. And this chapter doesnt beat around the bush. It shows you how to build configurations that are usable in a real network. Each example details a specific technology, and a summary at the end of the example draws comparisons and conclusions about the differences between the IOS and Junos configurations.
Using the configurations to study going from IOS to Junos, compare sequences, match commands, and get accustomed to the output.
Figure 2. To configure the IOS routers for initial connectivity In order for the routers to be able to communicate, IP addressing must be configured on connected interfaces. Set IP addresses on the interfaces on R1: R1 configure terminal R1 config interface loopback 0 R1 config-if ip address 1. Set IP addresses on the interfaces on R3: R3 configure terminal R3 config interface loopback 0 R3 config-if ip address 3.
Ping R1 to R2: R1 ping Ping R1 to R3: R1 ping Ping R2 to R3: R2 ping In a production network, the loopback interfaces are often advertised into the OSPF network so that the router-id of the device is a reachable address. Including the passive-interface command simply tells the software to advertise the link as a Type-1 LSA, but it does not attempt to form an adjacency over that interface.
Include the passive-interface command since there will never be an OSPF neighbor via the loopback: R1 configure terminal R1 config router ospf 1 R1 config-router network 1. Alternately, a simple check of the LSDB on any router within the area should give similar information.
Ensure the loopback on R1 1. Ensure the loopback on R2 2. Ensure the loopback on R3 3. An example of this is if a router-id that is not an IP address assigned to any interface on the router is desired. It is also sometimes desirable to ensure deterministic entries in the OSPF link-state database LSDB as opposed to allowing the system to arbitrarily choose the router-id.
Use show commands to view the current router-id for R1. Then, configure R1 to use router-id Use show commands to view the current router-id for R2. Then, configure R2 to use router-id Use show commands to view the current router-id for R3.
Then, configure R3 to use router-id Pay attention to the logical structure of the configuration, and the placement of interface and protocol configuration. The advantages of such a simple and standardized structure should be easily apparent. To Configure the Junos Routers for Initial Connectivity Here youll use the knowledge you gained in Chapter 1, and apply interface addressing for each of the routers being configured, including the loopback interface.
This is significantly less complex than the archaic network commands that are used in IOS. This output should be familiar, as it is very similar to the output of the IOS equivalent command.
This is the first time that youve seen the routing table in Junos in this book. As there is no concept of classful networking in Junos, notice that there are no statements similar to the x.
This almost always results in the router choosing the address assigned to the loopback interface to be used as the router-id.
This is essentially the same behavior that youd be used to with IOS.
Day One - Junos for IOS Engineers
And again, these small magnifications would magnify in a much larger network as well. Comparing the two OSes you should be able to learn not only the Junos methodology but its consistent framework for policy configuration. Lets just use two routers that are directly connected. The EBGP peering will use the physical interfaces. The following is the diagram of the topology: Figure 2.
Use physical interfaces to peer. Advertise loopback interfaces to neighbor. Set IP addresses on the interfaces on R2: R2 configure terminal R2 config interface loopback 0 R2 config-if ip address 2. Configure the BGP process on R1 to advertise its loopback address: R1 configure terminal R1 config router bgp R1 config-router network 1. Configure the BGP process on R2 to advertise its loopback address: R2 configure terminal R2 config router bgp R2 config-router network 2. And commit the configuration:  cjones R1 commit and-quit commit complete Exiting configuration mode 4.
Commit the configuration:  cjones R1 commit and-quit commit complete Exiting configuration mode 4. Lets do that now. Like most routing manipulation in Junos, this is accomplished using policy.
Also, a quick check of the routing table should confirm that our prefixes are being installed. While it is handy to be able to configure route advertisement directly under the BGP process in IOS, there is no question that this is where Junos policy configuration can really shine for you. Having a consistent framework for policy configuration is a clear example of where Junos can excel in your network.
As your network grows, or requires new services, these advantages will grow as well.
Another thing worth mentioning is the concept of synchronization, which in IOS states that a route must be actively in the routing table from an IGP before it will be announced via BGP. Typically this is disabled. Junos has no such criteria.
The IBGP peering will be configured to peer between loopback addresses, which will require us to add a static route in order for the remote loopback address to be reachable.
This section will use two routers directly connected in a single AS, as shown in the diagram of the topology in Figure 2.
Use loopbacks for IBGP peering. Configure a static route to R2s loopback address on R1, pointing to R1. R2s physical interface as the next-hop: R1 configure terminal R1 config ip route 2. Configure a static route to R2s loopback address on R1, pointing to R2s physical interface as the next-hop: R2 configure terminal R2 config ip route 1. Ping from R1 to R2s loopback: R1 ping 2. Ping from R2 to R1s loopback: R2 ping 1. Youll notice that the configuration is nearly identical to the EBGP configuration in the previous task.
The main difference is the type is now internal. Also, notice how the local-address configuration option is used to specify that the IBGP messages should be sourced from the loopback address.
This is because Junos explicitly defines the BGP peering as internal, whereas in IOS the type is implictly defined as internal by configuring the peer with the same AS as the local router.Show the trunk configuration and verify: To prevent the software from rolling back the configuration, simply type a second commit within the commit confirmed time window, which is 10 minutes by default.
Helmi Amir Bahaswan. Verify the trunk configuration: Sun Jun 24 This basic task illustrates the different ways that commits are done by the two OSes. And the same for R3. Chris has more than eight years of industry experience with both Cisco and Juniper products and solutions.