With shared tree, multicast distribution roots at RP. RP Configuration You can configure – for different groups – as many rendezvous points as you like. But you must note that all routers in the multicast domain agree on the RP for the group. There are different ways that RPs are defined: Static RP: You configure […]
Subscribers use IGMP to join a multicast group. If the publisher also resides in the same network as the subscriber, it is sufficient. However, if the subscriber and the publisher are not in the same network, a multicast routing protocol must exist to route the multicast traffic down to the subscriber from the source. Cisco […]
A multicast distribution tree (MDT) is the paths through the network from source to receive used to distribute multicast data traffic. There are two types of trees: Shortest Path Tree (SPT): this tree is also known as source tree which is the quickest path from the source to receiver. But it may require more states […]
Data delivery models Let’s review what Multicast is by first looking into three other types of data delivery. Unicast: one-to-one transmission Broadcast: one-to-all transmission Anycast: one-to-nearest transmission Multicast is data transmission from one or a group of publishers to a group of subscribers. With that being said we will have different applications with IP Multicast […]
IP Service Level Agreement (IP SLA) IP SLA allows you to probe different key performance indicators of the network such as reachability, latency, jitter, etc. For the purpose of CCIE Datacenter, we are only going to enable feature sla sender. In particular, I am going to explain the ICMP echo configuration. Frequency: The seconds between […]
BFD Overview When a link fails, with routing protocols we need to wait until hold time or dead-interval expires then we recalculate the route to the destination. We could lower the hello packet as well as dead-interval timers to expedite the convergence. However, not only we are still talking about some seconds of downtime but […]
Network Layer Jobs IP Routing One of the main roles of the Network layer is to forward packets between hosts. A host can send a packet to: Itself: Host can use it’s own interface IP or its loopback address to send a packet to itself. Same local network: When a host wants to send a […]
IS-IS Overview Intermediate system to intermediate system (Short for IS-IS) is an IGP link-state protocol which builds a link-state database. Like OSPF, It will the run the Dijkstra SPF algorithm to find the best path to the destination. IS-IS has an AD of 115 with Cisco NX-OS. Unlike OSPF, IS-IS does not run over network […]
OSPFv2 Overview With Open-Shortest Path First (OSPF) as a Link-State routing protocol, routers build some information about the network. Those information include: Router ID Number of Links Links Descriptions Attached Router Subnet Mask Metric The routers multicast these information (Link State Advertisement or LSA) to the segment. As a result, all routers in the same […]
Elissa Garlin
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