By default RIP sends updates each 30 seconds In this lab we change the value of the invalid timer to 90 seconds What happens if we filter RIP updates R2 sends over fa0/0 link?...
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RIP maximum equal cost paths feature
In this lab, we check how maximum equal paths feature works in RIP In this lab R2 advertises 2.2.2.2/32 subnetwork to R1 via RIP. R1 processed three equal paths through interfaces fa0/0, fa1/0 and...
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Multicast routing: a step by step… Part 1
In the above test lab, Servers send multicast trafic to both clients. In IPv4, multicasting servers uses class D range of addresses: 224.0.0.0-239.255.255.255. Some addresses are well known and others for specific use… In...
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Routing from scratch… Part 0
The person in A wants to join its colleagues in location B through the network topology described in the below figure. This person needs to go back home at the evening! ” This person...
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SSL VPN to my home network
Using only my Box (FTTH), I’m able to access my home network (box Lan subnet) by simple NAT redirection from any internet location. More precisely, I connect to as many hosts, residing in my...
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What is the best way to subnetting?
Given a network ip address what would be the optimal subnetting method? optimal, such as to use the less possible ip addresses, the less possible subnets, a subnet per vlan, multiple subnets per vlan,...
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Cisco HSRP in detail
RFC 2281, What does RFC 2281 say about Cisco HSRP that may affect the IP traffic flow process? Lab setup, Let us analyze the IP traffic forwarding process in our lab setup: The logical...
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My first scapied IPv6 packet
The idea of this lab is to craft an IPv6 packet from scratch using Python and Scapy library. The IDE I use is JetBrains PyCharm Community Edition 2018.3.1 x64 which is available for free...
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BGP session keepalive and hold times
At the beginning of the BGP peering establishment, the BGP neighbors agree on the hold time value (included in OPEN message): the time a peering would be maintained without the reception of a KEEPALIVE...
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Setup a Check Point Lab using VirtualBox and GNS3 on Windows
In this lab we implement a basic security architecture. Our network is segmented into four zones: Two security gateways (SG) are management by a single security manager server (SM). A management PC is configured...
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Static routing with intermediate address in Check Point
It is not possible to configure a static route with an intermediate address in a Check Point security gateway. BUT … In out lab setup R4 tries to reach R3 using its loopback0 interface...
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