Thank you! Your channel is awesome. As a data analyst working on cloud network data, I'm hunger for everything about the switches, optical transeivers, chassis... Your video is so informative. Merci:)
Thank you for posting these Videos up. They have helped me alot. The videos that I love the most are the ones where you are interacting with a real classroom of students. You are much slower and repeat things which is something that helps me retain the information much better. Thanks again Professor!
One thing to clarify (and you may have in other videos)... the VLAN ID is 12bits, so there are 4096 possible numbers [0-4095]. However, zero is reserved for "no vlan" -- used for 802.1p priority tagging. Many other switches also reserve some of the high order IDs for internal purposes -- vmware treats 4095 as "all vlans", Nortel's STP uses 4000-4007 for each instance (and they're reserved when you aren't run NSTP), Cisco still reserves a few in the 1000's for protocol translation for tech that hasn't existed for years (FDDI and token-ring), etc. Also, most switches don't support using all 4k vlans at the same time -- eg. HP Procurve is 16 by default, 256 max. If you run away from anywhere with thousands of vlans, you'll be excluding yourself from many ISP and datacenter jobs. But yes, a single switch with thousands of vlans will be a nightmare. (VXLAN was designed because 12bits were too small.)
You mentioned the word "trunking" ( trunk) I learned that word from my time working at Tie Communication in the early nineties Basically connecting a dedicated phone line from a PBX mainframe to the telcom switch on the central office.
I noticed on some of your diagrams, you have listed some FS switch numbers, most likely for just demonstration purposes but I am trying to upgrade our company into a more enterprise level infrastructure but there is so much selection and some manufacturers are so much cheaper than others. Any experience or hands on with the some of these more affordable oslutions like FS or Mikrotik form an enterprise stand point. Great video series.
Thanks for the question, I honestly do not have the proper test equipment to test these type switches and properly review them in relationship to other vendors like HPE and Cisco. I can say the products I have used have been very good quality. I would not have a problem with FS.com.
so ive worked for multiple ISP now and i think ive finally found my home, granted im only 23 but thats irrelevant. I'm trying to broaden my knowledge in the field and move on from just being a residential tech. seeing how ENS works i think ill be better off in construction calculating attenuation over single mode fiber.
Question on switches Months ago I tried connecting a switch to a cable modem ( one IP number in Bridge) directly and then connecting two WIFI modems to the switch Spectrum told me not to do this because in the bridge configuration the other ports in the back of the modem don't work, you only use one ( port #1) When I connected both routers one would throw a IP conflict message. Spectrum advised me to daisy chain the routers You stated that switches connect by MAC address. So I was under under the assumption that the switch would read the MAC address of the cable modem and allow the routers to connect to a single IP number ( don't laugh ) Why didn't this work ? Those Spectrum cable modems should have a SFP port to go directly to a switch as a trunk line , and then firewall and or router from there? Make sense.
Thank you! Your channel is awesome. As a data analyst working on cloud network data, I'm hunger for everything about the switches, optical transeivers, chassis... Your video is so informative. Merci:)
Lots of good stuff here in the channel on those subjects! Thanks for the comments!
Thank you for posting these Videos up. They have helped me alot. The videos that I love the most are the ones where you are interacting with a real classroom of students. You are much slower and repeat things which is something that helps me retain the information much better. Thanks again Professor!
The classroom has real benefits as you mentioned, not everyone learns the same so I am glad it is helpful.
One thing to clarify (and you may have in other videos)... the VLAN ID is 12bits, so there are 4096 possible numbers [0-4095]. However, zero is reserved for "no vlan" -- used for 802.1p priority tagging. Many other switches also reserve some of the high order IDs for internal purposes -- vmware treats 4095 as "all vlans", Nortel's STP uses 4000-4007 for each instance (and they're reserved when you aren't run NSTP), Cisco still reserves a few in the 1000's for protocol translation for tech that hasn't existed for years (FDDI and token-ring), etc. Also, most switches don't support using all 4k vlans at the same time -- eg. HP Procurve is 16 by default, 256 max.
If you run away from anywhere with thousands of vlans, you'll be excluding yourself from many ISP and datacenter jobs. But yes, a single switch with thousands of vlans will be a nightmare. (VXLAN was designed because 12bits were too small.)
Thank you for the comment and information, we appreciate our viewers input and comments. It makes the channel stronger!
Awesome video! Great educational supplement. Thank you for making understanding switches easy! Keep Em' Coming!
Thanks, will do!
I am a big Fan of your Work. Thank you so much for transferring your knowledge to others.
Thank you for the kind words, and for watching!
You mentioned the word "trunking" ( trunk) I learned that word from my time working at Tie Communication in the early nineties Basically connecting a dedicated phone line from a PBX mainframe to the telcom switch on the central office.
John, great point! Much of the technology and terminology we often use in networking came from our co-workers in telecom.
Very well explained. Awesome video.
Glad you liked it!
Your knowledge is impressive Obi-wan. I look forward to more.
Thanks for watching!
Another great video from you 🎉
Thank you 🤗
Well explained..👍👍
Glad you liked it
Where have you been all my life 😀😀
Welcome to the channel!
Thanks alot for this Gem....
Thanks for listening
I noticed on some of your diagrams, you have listed some FS switch numbers, most likely for just demonstration purposes but I am trying to upgrade our company into a more enterprise level infrastructure but there is so much selection and some manufacturers are so much cheaper than others. Any experience or hands on with the some of these more affordable oslutions like FS or Mikrotik form an enterprise stand point. Great video series.
Thanks for the question, I honestly do not have the proper test equipment to test these type switches and properly review them in relationship to other vendors like HPE and Cisco. I can say the products I have used have been very good quality. I would not have a problem with FS.com.
Thank you Boss
Thank you for watching!
so ive worked for multiple ISP now and i think ive finally found my home, granted im only 23 but thats irrelevant. I'm trying to broaden my knowledge in the field and move on from just being a residential tech. seeing how ENS works i think ill be better off in construction calculating attenuation over single mode fiber.
Thanks for watching!
the HP web admin interface looks similar to the Zyzel interface.
Many of the vendors have similar interfaces. Thanks for watching
Just joined your channel and found it very clear and useful. Do you have any videos about on onsite Server vs AWS or other cloud services?
There are many good resources on both of those subjects so I try and keep working on areas that are not well covered.
Question on switches Months ago I tried connecting a switch to a cable modem ( one IP number in Bridge) directly and then connecting two WIFI modems to the switch Spectrum told me not to do this because in the bridge configuration the other ports in the
back of the modem don't work, you only use one ( port #1) When I connected both routers one would throw a IP conflict message.
Spectrum advised me to daisy chain the routers You stated that switches connect by MAC address. So I was under under the assumption that the switch would read the MAC address of the cable modem and allow the routers to connect to a single IP number ( don't laugh ) Why didn't this work ? Those Spectrum cable modems should have a SFP port to go directly to a switch as a trunk line , and then firewall and or router from there? Make sense.
John, send me an email and I can more clearly flush out the issues and see if we can help better understand and solve the problem.