When R1 sends Ethernet frame to Host, it calculates CRC and put the result in Ethernet frame.
This is my understanding , please correct me if i am wrong:
Sw1 and Sw2 simply looks up destination mac in mac table and switch the frame without checking CRC. Only Host will perform CRC and accepts or discards frame based on that
Am I correct ?
( I understand the CRC can be caused by faulty NIC at sender /receiver, physical medium, duplex mismatch)
If i am correct, that also means CRC not always shows the issue with the local segment i,.e the link between sw2 f0//2--Host, to put in another way if we have bad cabling sw1 f0/1-- f0/1 sw2 that is causing some bits to change, it will cause CRC errors when the frame arrives at HOST.
This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
j ai une question j ai achete un routeur cisco 887VA-k9 , je le configuré avec la configuration ci- dessous
si je le lier avec mon pc portable sur l un de ses ports directement ça marche toute est bien ( la connexion internet + m...
Attached policy provides CLI access to the Cisco 4G router over text messaging. Two files are in the attached .tar file:
2. PDF with instructions on how to load and use the .tcl file.