What Is ARP? ARP stands for Address Resolution Protocol. It is a method of mapping a layer 3 protocol address to a layer 2 or hardware address. In most cases, ARP maps an IP address to an Ethernet MAC address. Something to be aware of is that ARP is used with IPv4. IPv6 uses the […]
What happens if you create a connection between two non-backbone OSPF areas that already connect to area 0? We sometimes call this a backdoor link. Connecting two non-backbone areas was covered in part 1. Will routes be shared between the two areas? Or will no routes be shared and traffic will travel via the backbone
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What happens if you connect two OSPF areas together when neither of them is area 0? Will routes be shared between the two areas, or will it simply not work? I can think of two scenarios for this: In this post, we’re going to lab the first scenario out and see what happens. We’ll look
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In this post, we’re going to walk through the process for configuring RIPng on Junos-based devices. It is very similar to RIP, so you may like to look at configuring RIP part 1 and part 2 as well. RIPng is used to advertise IPv6 routes. So we will want to look at the inet6.0 routing
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In part 1 we looked at the basics of configuring RIP on Junos. In part 2 we are going to look at authentication, changing metric values, and changing the preference for RIP routes. Lab Setup The lab setup is the same as it was for part 1. A couple of things to note with the
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In this post, we’re going to walk through the process for configuring RIP on Junos-based devices. There are a couple of key points to remember: Lab Setup The following diagram details the lab. A couple of things to note with the lab: RIP Configuration Router R1 We will configure the following: There are a couple
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I recently came across an interesting issue with DHCP and Client Identifiers. Whilst working on the Junos as a DHCP server post, I found that only one client would get an address via DHCP, and the other client wouldn’t. The MAC addresses were different, so it appeared that it should be working. After some searching,
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We’re going to look at how to configure three types of devices to act as a DHCP server. Click here if you need a refresher on how DHCP works. Although the configurations are done on the virtual edition, it will be the same for physical devices as well. The configuration is basically the same across
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BGP community strings are widely used in routing policy. In this post we’re going to look at: Lab Setup All of the examples that follow are based on the following lab setup. VMX-2 is advertising the following routes to vMX-1. Route Community Strings 172.16.0.0/24 65001:100 65002:50 172.16.1.0/24 65001:200 65003:6789 172.16.2.0/24 65001:300 65002:50 172.16.3.0/24 65001:400 65003:9876
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BGP community strings are a way of marking or tagging a route. Routing policy can then match on a community string, and take a defined action. They are typically used in one of two ways: Types Of Community Strings Broadly speaking, there are three types of community strings. Standard communities are 4 bytes long and
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