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тАО09-01-2008 11:50 PM
тАО09-01-2008 11:50 PM
802.1Q tag?
Quick question on the 802.1Q tag.
The "tagging" is done in a quite unusual way (I think) when inserting it between the Source MAC address and the Type field and I am wondering the reason for this.
Is the purpose the make the frame look like an unknown Type if it is being sent to an non-802.1Q aware device?
2 REPLIES 2
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тАО09-02-2008 09:15 AM
тАО09-02-2008 09:15 AM
Re: 802.1Q tag?
802.1q tagging protocol
attach in ethernet frame 4byte taging information
(vlan id,priority level) and this information make only see 802.1q device
if send this packet non-802.1q avare device overlook taging information in frame
cenk
attach in ethernet frame 4byte taging information
(vlan id,priority level) and this information make only see 802.1q device
if send this packet non-802.1q avare device overlook taging information in frame
cenk
cenk
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тАО09-02-2008 11:03 AM
тАО09-02-2008 11:03 AM
Re: 802.1Q tag?
Thank you for your answer.
>if send this packet non-802.1q avare device
>overlook taging information in frame
I am wondering if the purpose with the tagging standard, in effect replacing the EtherType from, say 0800, to the new 8100, is done the ensure that no non-802.1Q device could misinterprent it?
If the tagging was done for example first in the frame and it was sent to a non-802.1Q device, then it should assume that the VLAN-tag was part of the destination mac address?
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