The command you have referenced will cause the native VLAN on a trunk to be tagged.
I would read this article below HYPERLINK "http://www.cisco.com/en/US/products/hw/switches/ps4324/products_configurati on_example09186a0080722cdb.shtml"http://www.cisco.com/en/US/products/hw/swit ches/ps4324/products_configuration_example09186a0080722cdb.shtml Tyson Scott - CCIE #13513 R&S and Security Technical Instructor - IPexpert, Inc. A Cisco Learning Partner - We Accept Learning Credits! Telephone: +1.810.326.1444 Fax: +1.810.454.0130 Mailto: HYPERLINK "mailto:[EMAIL PROTECTED]"[EMAIL PROTECTED] IPexpert - The Global Leader in Self-Study, Classroom-Based, Video On Demand and Audio Certification Training Tools for the Cisco CCIE R&S Lab, CCIE Security Lab, CCIE Service Provider Lab , CCIE Voice Lab and CCIE Storage Lab Certifications. _____ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Hesham Y. El-Sayed Sent: Monday, December 24, 2007 10:53 AM To: Ralph Olsen Subject: Re: [OSL | CCIE_RS] Voice Vlan and tag native Guys i still didn't get it could you please clarify these points again? On Dec 19, 2007 10:18 AM, Ralph Olsen <HYPERLINK "mailto:[EMAIL PROTECTED]" [EMAIL PROTECTED]> wrote: Hi R&S-list, if I have a switchport config with access vlan 20 and voice vlan 170 switchport access vlan 20 switchport mode access switchport voice vlan 170 as I understand it the voice vlan command will "create" a trunkport to the cisco phone and run dot1q with the access vlan as the native vlan. Packets with none dot1q header will be in the native vlan and assumed to be from the PC's, and packets with the dot1q header and vlan 170 tag will be in the 170 vlan. But what will happened if you get a task to tag all vlans travelling a trunk? Vlan dot1q tag native? -Ralph -- Regards -------------------------------- Hesham Yousry El-Sayed Senior Data Network Engineer Desktop and Infrastructure IT Operation and Support Vodafone Egypt HYPERLINK "http://www.vodafone.com.eg/"; \nwww.vodafone.com.eg Mobile: +20107100048 No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: 269.19.20/1260 - Release Date: 2/5/2008 9:44 AM No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: 269.19.20/1260 - Release Date: 2/5/2008 9:44 AM
