Computer Networking: Worst Case Scenario

Click For Summary
SUMMARY

The discussion focuses on calculating the worst-case scenario for a router with a T1 serial interface and two 100 Mbps Ethernet interfaces, equipped with a 1 GB buffer. The worst-case traffic pattern involves both Ethernet interfaces transmitting data simultaneously, leading to a potential queue fill time. Specifically, the router can sustain loss-less operations for approximately 5 milliseconds under maximum load, assuming ideal conditions. Participants emphasize the importance of understanding the relationship between Mbps and MBps for accurate calculations.

PREREQUISITES
  • Understanding of router architecture and interfaces, specifically T1 and Ethernet.
  • Knowledge of data transfer rates, including Mbps and MBps conversions.
  • Familiarity with network buffering concepts and packet processing.
  • Basic principles of networking, including traffic patterns and their impact on performance.
NEXT STEPS
  • Research the specifics of T1 and Ethernet interface performance metrics.
  • Learn about network buffering techniques and their effect on packet loss.
  • Explore traffic shaping and management strategies for routers.
  • Study the implications of simultaneous data transmission on network performance.
USEFUL FOR

Network engineers, IT professionals, and students studying computer networking who need to understand router performance under load conditions.

sleepycorey
Messages
1
Reaction score
0

Homework Statement


Router architecture. Consider a router with a T1 serial interface and two 100 Mbps Ethernet interfaces. The router has a 1 GB buffer for storing packet traffic. Calculate, in the worst case, how long the router can sustain loss-less operations. Define carefully what traffic pattern will result in the worst case scenario.

The Attempt at a Solution


It has been a while since I've done anything with networking. I am pretty sure this is not as simple as if the two interfaces are both inputting 100 Mbps, the queue would get filled in 5 msec. I know the cpu will process some of the packets, but I do not quite remember everything
 
Physics news on Phys.org
sleepycorey said:

Homework Statement


Router architecture. Consider a router with a T1 serial interface and two 100 Mbps Ethernet interfaces. The router has a 1 GB buffer for storing packet traffic. Calculate, in the worst case, how long the router can sustain loss-less operations. Define carefully what traffic pattern will result in the worst case scenario.

The Attempt at a Solution


It has been a while since I've done anything with networking. I am pretty sure this is not as simple as if the two interfaces are both inputting 100 Mbps, the queue would get filled in 5 msec. I know the cpu will process some of the packets, but I do not quite remember everything
If you think you can download 1GB of data in 5 msec over 2 100Mbps lines you are going to be disappointed next time you download a movie...

100Mbps is how many MBps? And how many MB in a GB?
 

Similar threads

Recommend architecture/protocol to sync data between MCUs
  • · Replies 12 ·
Replies
12
Views
2K
  • Sticky
Getting Started With Computers and Programming
  • · Replies 13 ·
Replies
13
Views
8K
MHB Convexivity issues in a new type of network - NLP
  • · Replies 1 ·
Replies
1
Views
3K
Losing Wifi hotspot when connecting to signal
  • · Replies 43 ·
2
Replies
43
Views
6K
Courses Are computer science courses worth taking for physics?
  • · Replies 1 ·
Replies
1
Views
3K
Requesting suggestions for languages, libraries, and architectures for parallel (and sometimes non parallel) numerical and scientific computations
  • · Replies 8 ·
Replies
8
Views
4K
Graduate BRS: PKI Cryptosystems for SA/Ms: A Tutorial
  • · Replies 13 ·
Replies
13
Views
4K
Civilization of millions of rings.
  • · Replies 3 ·
Replies
3
Views
5K