As per the CCNA theory and every single test I have made on Packet Tracer's 2950-2960 switches, a switch access port:
- Sends out untagged traffic
- Drops any incoming tagged traffic
Additionally, if we enable a voice vlan on that access port, ingress and egress traffic on that vlan is tagged, as per the next link: http://www.ciscopress.com/articles/article.asp?p=1315434&seqNum=4
So the following commands used to connect IP Phones to a Cisco switch make the access vlan 20 send and receive untagged traffic to/from the PC, while at the same time the voice vlan 25 sends and receives tagged traffic to/from the IP Phone:
switchport mode access
switchport access vlan 20
switchport voice vlan 25
My question is, what is going on in the following link's example? Why does their access port send out tagged traffic from the access vlan 140?
https://mrncciew.com/2013/07/26/voip-phone-switchport-config/
I found that link on a discussion here and it certainly confused me.
Thank you in advance.
