Cisco 2821 and CCNA
It’s a remarkable day as the Cisco 2821 has been delivered in full today by TNT Australia. I am sure I would get more challenges in CCNA exam preparation. I’ve bought a complete course from Udemy and CCNA here I come!
I was quite familiar with the basic knowledge of networking equipment and CCNA preparation is a great chance for me to enrich my knowledge in IT.
======Quick Overview about the Router======
The Cisco 2821 is larger than I expected. It weights around 8KG at most. When I opened the case, there was a large green motherboard PCB and it looks like a powerful PC 🙂
The router I bought comes with a AIM-VPN/EPII-PLUS module, which supports high-speed encryptions and decryptions with VPN connections. Indeed, it is supposed that the DES and 3DES encryptions are embedded on board but I had no idea about the improvement of the performance.
2 Gigabyte NIC installed on board, the controller chips are manufactured by Broadcom. Well, I am at beginner level, is the 2 NIC enough for daily use?
The system is pre-configured with v15.1 of the IOS system which is stored on 256MB CF Card. It comes with 512MB memory.
The booting up is VERY noisy but it is getting silent after the system is fully booted up. I am also after a 2950 Switch from Ebay and it’s still OTW. I will post more photos if it is necessary 🙂
The Udemy Course:
By dch1 in 心情随记, 程序人生 No Comments Tags: CCNA, Cisco, ICND1, ICND2
Once upon a time, this is a very start story of a CCNA exam preparation. Too early to tell them all but I am keen to take it apart – the ultimate destroyer would agree with me.
I do love Electronic Engineering, given that I had involved in quite a few of programming and Mechatronic projects. I am planning to study CCNA with attending ICND 1 and ICND 2 exams, which are the requirements to be qualified as an IT Engineer so I grabbed this Cisco switch.
Overall, C2950G gets a impressive built quality as well as the price. I wish I could get C3550 which is a L3 switch. Unfortunately, the seller on eBay informed me they were oversold the product but let me ‘upgrade’ to a lower level of the model for free(Yes, C2950 is not as good as 3550 but this one comes with more expensive EI version, stands for Enhanced Image) and I wanna give it a go.
I have got this switch for couple of days but I was quite busy so I made a decision to write this report on Saturday.
Now let’s have a look at the Cisco C2950 Switch with Enhanced Image firmware.
The C2950 is not as big as the 2821 router, with only half size of the router.
If we remove the screw on the back side and the rack, we can easily remove the top panel.
There are 2 large Broadcom chip with a Cisco logo on it. I cannot find much of the information (only says “24-PORT GBE SWITCH WITH 4-PORT GBE/2.5GBE HGL PORTS” on a few of websites) on the Internet so it most likely the special model manufactured for Cisco, and it is called BCM5628. I used a USB port to make a comparison with its size.
The PSU looks fairly simple but it must be reliable and durable. All of the capacitors were built in a very good quality. There is only one fan, kind of turbo fan, for the system and it’s powerful and noisy (especially during the few seconds on boot).
The model number of the RAM is K4S643232F-TC60. It is a 512K x 32bit x 4 Banks Synchronous DRAM LVTTL with the maximum frequency of 166MHz. It’s out of fashion these days but this switch could be dated back to 2003. It’s still useful for CCNA students, just like me 🙂
To my surprise, this switch uses a MAX3232 chip, the variation model of classical MAX232 (widely used for TTL to RS232 circuits, and I am very familiar with it. I could even find some ultrasonic distance sensing modules using MAX232 as a boost voltage source @~10V). It could be operated under 3.3V for a 3232 chip from my own experiences. My console cables have been arrived as well in another mail.
The last screenshot is about the console interface, and I am using putty with the COM1 port on the motherboard. I am planning to make a Raspberry Pi based Access Server by using USB to RS232 cable for remote access.