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Internet Router Redundancy Example 1

We have a topology above. I will tell about it from left to right. I have a PC. Its gateway is R0 that has 50.0.0.0/24 subnet and R0 do SNAT from fa0/1 (inside) to fa0/0 (outside). R0 has a default route to virtual address of 10.130.0.1. R1 is VRRP master and R2 is VRRP backup.…

Juniper QFX Multichassis Link Aggregation Example

In this post, I will show you a basic MC-LAG topology and configure it on Juniper devices. Here is the topology as below; Here are the QFX configurations; There are some points to be carefull. 1- We use same service-id on both QFX switches2- We use MC-AE mode active-active on both QFX switches. 3- QFX1’s…

BGP 001 – Route Advertisement from Indirect Sources

We have a topology like below. R1 and R2 have BGP neighborship. R1 have 1 static route to R3 and 1 OSPF route to R4. We want to see the prefixes on R2. Configurations on R1 like below; I want to talk about ALC_001 and MAP_001. In the neighborship between R1 and R4, I also…

Arista MLAG and Virtual Router Example

In this topology, I have 2 Arista switch and a Cisco switch. I will show an example of how MLAG configured on Arista devices. On Cisco side, due to LACP is not active, I used PAgP. On Arista side there is also virtual router configuration. Here are the configurations. First let’s look at the left…

FHRP Case 1

HSRP Approach In this topology, there is a gateway device (R3) and it has two routes to go to internet. These two routes are below and first one is R1 HSRP group 1 virtual IP address and second one is R2 HSRP group 2 virtual IP address. One of the router (R1 or R2) if…

Palo Alto CLI Commands

Here are some useful Palo Alto device CLI commands that I used before..

my python works

The screen below is the screen showing the main menu with daily operations. Proceed by entering the operation number. Operations are carried out using multi-threading on more than one device. In addition to printing the outputs to the screen, they are also written to separate text files as reports. After selecting the operation from the…

Some Linux howtodos

How to access internet through proxy, when we use yum? In the /etc/yum.conf file, add the line below, under the line that says [main]. How to access internet through proxy, when we use wget? In the /etc/wgetrc file, add the lines below How to check if a TCP port is open?

Juniper Aggregate and Generate Routes

Aggregate Routes Aggregated routes are used for route summarization, allowing us to represent a large number of routes with a broader network. This helps streamline configuration and reduces the clutter in routing tables. For example, let’s consider a scenario where one of the two routers, both engaged in dynamic routing, has three networks: 10.5.1.0/24, 10.5.2.0/24,…

Juniper Static Routing

Hello, in this article, we will explore how to configure static routes on Juniper devices. The main topics covered are summarized below: 1- Default Preference Value : 5 In the example below, a single static route is written on the device. When we want to see this route in the routing table, we can observe…