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How does a router determine the best path and switches packet?
A primary function of a router is to determine the best path to use to send packets. To determine the best path, the router searches its routing table for a network address that matches the destination IP address of the packet.
How does the LSR know which is the top label bottom label and a middle label of the label stack?
How does the LSR know which is the top label, bottom label, and a middle label of the label stack? The label immediately after the Layer 2 header is the top label, and the label with the S bit set to 1 is the bottom label. No application requires LSR to read/identify the middle labels.
What is IP routing and switching?
Routing and Switching are different functions of network communications. The function of Switching is to switch data packets between devices on the same network (or same LAN – Local Area Network). The function of Routing is to Route packets between different networks (between different LANs – Local Area Networks).
When does the label value of an IP packet change?
When a labeled packet is being sent from LSR A to the neighboring LSR B, the label value carried by the IP packet is the label value that LSR B assigned to represent the forwarding equivalence class of the packet. Thus, the label value changes as the IP packet traverses the network.
How to check packet loss on router-Cisco community?
09-28-2011 07:16 PM 09-28-2011 07:16 PM I have to determine if packets are being lost between my IP cisco phones on one site to the call manager on other site through my cisco router. What do I I do on the router to see if packets are being lost?
How are labels determined in a label switching router?
Each label switching router (LSR) in the network makes an independent, local decision to determine a label value to represent a forwarding equivalence class. This association is known as a label binding. Each LSR informs its neighbors of the label bindings it has made.
What do you need to know about IP routing?
This has nothing to do with the “learning” of network routes through static or dynamic routing protocols. but has everything to do with the steps that routers have to take when they forward an IP packet from one interface to another. In this lesson, I will walk you through an example and show you all steps that occur.