Let’s put into play AS-Override feature in BGP: see when it applies and how it works. First, AS-Override feature applies to sites that have the same AS number but are linked by another different...
introduction What happens when LAN interfaces are configured as point-to-point network type OSPF interfaces instead of default broadcast type? And more than 2 ospf routers are present on this media? L...
This blog is a part of series of posts about EIGRP routing protocol. Let’s recall that EIGRP is one of the so called IGP routing protocols. IGP stands for interior routing protocols as opposed t...
This post is part of a series of posts about dynamic routing protocols and especially RIP. We’ll try to get a deep understanding of its operation and function as an introductory to dynamic routi...
Presenting ARM In this post, that is a part of a serie of post that discuss how Wlan to radio ressources management, we talk of Aruba way of doing it. The figure shows a simple wlan network of 6 AP or...
Introduction An Ethernet switch is the central element of a LAN network and operates at data link OSI layer. Every switch port defines a collision domain and can extend a broadcast or broadcast frame ...
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- EIGRP over a vNET trunkIn this blog we’ll explore the operation of IGP interior routing protocol EIGRP over vNET trunks (another way to say networking trunking similar to vlan trunks used in L2 network by switches to trunks multiple traffics from different vlans into the same physical link) little introduction New IOS release 15.x introduced Easy Virtual Network (EVN)
- At the begining, … it was not DMVPN!The simplest way to interconnect 3 or more routers in the same broadcast domain (and the same subnet) is by attaching them to a switch (or hub) in the same vlan. In case they’re separated by long distances, an ISP may be required to put them together. From a network access perspective, they could be
- Vlan propagation and Cisco FabricPathIn this post, we explore the operation of Cisco FabricPath (FP) and more specifically Vlan information propagation in this fabric in comparison with other platforms: Catalyst for example from the same vendor. The case is to learn how the switches that are part of the LAN network learn about and support Vlan operation: is there
- Static routing with intermediate address in Checkpoint firewallStatic routing is supported by CKP (Checkpoint firewalls or gateways). Let’s recall that a static route defines a destination subnet or network and the way to reach it: the outgoing interface on the gateway, a connected nexthop ip address… whatif we configure this static routing using an intermediate address: an address of a nexthop that
- Setup a Check Point Lab using VirtualBox and GNS3 on WindowsIn this lab we implement a basic security architecture to demonstrate the operation of a firewall cluster to protect our network. Our “security domain” is segmented into four zones: Our security topology is compound by two security gateways (SG) that are managed by a single security manager server (SM). The SG gateways (firewall) are in