notfred wrote:Ignoring Cisco specific stuff, VLAN 0 is never valid because it is .1p rather than .1q. VLANs are .1q hence valid from 1-4094, 0 and 4095 are reserved values in 802.1Q
Techgoudy wrote:I'm not really into networking with Cisco gear, but I think this might help: https://supportforums.cisco.com/discussion/11369936/what-vlan0
notfred wrote:I've never heard those bits referred to as 'CoS bits' before, when someone says CoS, that to me means the IP layer QoS field, the COS, TOS, PREC, DSCP field depending on which set of standards you want to follow. The VLAN bits are always referred to as Priority bits or P-bits.
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