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How the IP ECN bits and the TCP ECN bits interact You may have noticed that both the IPv4 and TCP headers feature fields talking about ECN. Here's the IPv4 header. Here's the TCP header. These interact in a very strange way, but it makes sense once you understand it. 1. Two IPv4 hosts …
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Meraki Step By Step QoS Configuration The goal of this post is to give you a general overview of what a full QoS configuration on meraki gear consists of. There may be some tailoring you should do in your environment to have it fit better. First let's take care of the layer 3 part. …
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3.6 OSPF (V2 and v3) OSPF is an interior gateway routing protocol. Specifically it is a link-state routing protocol, it runs the Dijkstra SPF Algorithm. Is a classless protocol that supports VLSM and summarization. Why use OSPF? OSPF guarantees a loop free topology. All routers in an area should have the same OSPF database thus …
3.3.l Implement and troubleshoot bidirectional forwarding detection Bidirectional forwarding detection (BFD) is an open protocol defined in RFC 5880. BFD utilizes small UDP keep alives that are processed by asics for sub second convergence (versus using sub second hello rate that goes to control plane) If the device uses software CEF and does not have …
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3.3.f Implement and troubleshoot VRF lite VRF allows us to have a separate routing table instance for clients Configure all of the routers, their interfaces, loopbacks, OSPF processes. Identify any gotchyas. R1: int g0/0 ip add 192.168.1.2 255.255.255.0 no shut ip ospf 1 area 0 R2: int g0/1 ip add 192.168.1.2 255.255.255.0 no shut …
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3.3.e Implement and troubleshoot passive interface RIP, OSPF, and EIGRP all support what's known as passive-interfaces. Enabling an interface as passive will mean we will not send our hellos out on the interface, but we will advertise the interface's network into the routing protocol. for OSPF: en conf t router ospf 1 passive-interface <default | …
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