The post about BGP community strings on Junos received a comment about difficulties removing large BGP communities. This is a response to that comment, to see what works. BGP Large communities are defined in RFC 8092, which defines them as a 12-octet, or byte, structure. It is split into three groups of four octets: In […]
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This is a common error when configuring aggregated Ethernet links on Junos. The member or child interfaces must not have a logical unit defined. Example 1 – Configuration Under The Child Interface Look at the following output. To fix this, unit 0 must either be deactivated or deleted, as shown below. Example 2 – Inherited
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In Junos, multiple physical Ethernet interfaces can be combined to form a single aggregated Ethernet interface. The name of this interface will be aeX, where X is a number starting at 0 and incrementing upwards. This is the same as a port channel in Cisco speak, and you might hear these referred to as LAG,
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When it comes to IT, labs are one of the best tools for learning. Unfortunately, many of us tend to follow along, rather than experimenting with different configurations or tools. I like to divide learning labs into two broad categories: Well-designed course material will give you labs with clear instructions and a known outcome to
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In part one we discussed logging into Junos, changing the root password, creating a user account, and enabling remote access. In part two of getting started with Junos, we will look at interface configuration. The Quick Answer If you’re looking for a quick answer, the following is the basic format of the command. A specific
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Getting started with Junos can be a bit disorienting. While many other Network Operating Systems have similarities with Cisco’s IOS, Junos is different in many ways. In part one, we’ll look at: Gracefully Shutting Down Junos Although shutting down Junos isn’t the first thing you will need to do, it is important to understand that
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It’s still January, so it seems appropriate to discuss some of my goals for 2025 and goals in general. Why Make Goals Public Why am I making these public this year? There are competing views on whether making goals public is a good idea. The first is that making your goals public creates accountability. By
In this post, we will look at a basic multi-area OSPF configuration. If you haven’t already, it would be worth a quick review of the single-area configuration. This example is relevant to all Junos-based devices – M, T, MX, PTX, SRX, EX, and QFX. In the examples that follow, we will extend an existing OSPF
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In this post, we will look at a basic single-area OSPF configuration. In Junos, almost all the configuration occurs under the protocols stanza, with no interface-specific changes made under the interface configuration. This example is relevant to all Junos-based devices – M, T, MX, PTX, SRX, EX, and QFX. The Quick Answer The following will
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On Junos, it is generally accepted there are three authentication types for OSPF. There is a fourth method, using IPSec, which we’ll demonstrate later in this post. In all cases, the authentication is configured under the interface, under the protocols ospf stanza. Lab Environment This lab uses two vJunos Routers connected via ge-0/0/0. The relevant
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