related to network topics such a routing and switching. may include also some topics related to doing qos infrastructure management and administration
In this blog, let’s study static routing with an intermediate address to resolve in a Checkpoint firewall. Introduction Static 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…
In 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. Introduction The case is to learn how the switches that are part of the LAN network learn about and support Vlan operation: is…...
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In this blog, let’s discover the DMVPN feature. DMVPN stands for dynamic multipoint virtual private network and as per its naming, refers to the ability for many routers to share the same network built on a Wan equivalent to being connected to the same Lan. Before we start Before we start a little refresh on…
In 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)…
Let’s put into play AS-Override feature in BGP: see when it applies and how it works. Introduction First, AS-Override feature applies to sites that have the same AS number but are linked by another different domain with different AS number, as in the next figure. In our example AS number 1 has neighborship (E-BGP links)…...
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In this blog, we’ll discuss the operation of OSPF dynamic routing protocol in a specific case where all participating routers share the same LAN Ethernet broadcast network and are configured as point-to-point OSPF network. Introduction In the first part, we present the lab setup and details the routers configuration. In the second part, we analyse…
