The CRS-3 hardware overview is comprised of 11 modules and 21 lessons totaling almost 4 dragsholm slot adresse of video training.
The S2 stage is no longer needed.
Each cell is always sent on one fabric plane only. Verifying the Switch fabric operations: The Complete Switch fabric is logically divided in to 8 independent, identical and unsynchronized fabric planes and each fabric plane is comprised of S1, S2 and S3 Asics.
Cells are distributed to S2 elements in round-robin fashion; one cell goes to the first S2 element, the next cell goes to the next S2 element, the next cell goes to the third S2 element, and so on, and then back to the first S2 in sequence. Duration The CRS-1 hardware overview is comprised of 7 modules and 17 lessons totaling almost 3 hours of video training. Course Objectives After completing this course, you should be able to: Planes are not tied to any specific slots we can manually define which cards will form a specific plane.
Spanning tree protocol is used to determine which paths will be used for communications. One of these two cards needs to be operational otherwise FCC will shut down. Each ingress line card has 4 connections to each fabric plane which adds upto 32 connections to the S1 ASICs. Modular Power Systems Additionally, you will be able to verify correct operation of various CRS hardware components, yoga 500 memory slots line card chassis, switch fabric, route processors, and physical layer interface modules PLIMs.
It also performs the first level of multicast replication. Down Connects to - FE Port 7: The distinction is important to know as both kinds of switches are present on the same board and the CLI look and feel is similar.
There are 4 connections from each S3 towards the egress line card. The bandwidth is approximately 56 Gbps. CRS Multichassis As mentioned earlier a Fabric cards in a Single chassis CRS implements all three stages of switch fabric in a single card, however we can take the stage 2 out of this fabric card and implement a multi chassis CRS router.
Several switch element components on each switch fabric card perform the functions to implement each of the three stages S1, S2, and S3 of the switch fabric. The second acts as a "standby" shelf controller, serving as a backup if the active card fails. Life of a Packet Below mentioned figure shows the simplified view of CRS back to back Connectivity. As each link is of 2.
Each stage performs a different function. Data arrives at the S1 stage in the ingress 8-slot chassis and then passes over the fabric cables to the S3 stage in the egress 8-slot chassis.