In the past we set th native vlan to something other than Vlan 1 on all our switches in our buildings. That worked fine as long as nothing gets replaced...when some one is oncall and has to replace a supervisor module, it sets itself to native vlan 1. This causes a native vlan mismatch between the uplink switches and causes a STP recalc situation that brings that building down...since then we leave the native vlan to 1 and set the data/voice vlan to whatever we like...the only thing now that uses vlan 1 is vtp.
Larry Letterman Network Engineer Cisco Systems ----- Original Message ----- From: Samson Martinez To: [EMAIL PROTECTED] Sent: Tuesday, March 04, 2003 1:01 PM Subject: RE: shutting down VLAN 1 [7:64334] Can you elaborate a bit on the issues encountered? Thanks! Samson Martinez Motive Communications, Inc. -----Original Message----- From: Larry Letterman [mailto:[EMAIL PROTECTED] Sent: Tuesday, March 04, 2003 12:14 PM To: [EMAIL PROTECTED] Subject: Re: shutting down VLAN 1 [7:64334] Watch out for Vlan mismatch issues if your using 6500 platform switches. We had this issue in the past on our campus network. Larry Letterman Network Engineer Cisco Systems ----- Original Message ----- From: Luca Ciasca To: [EMAIL PROTECTED] Sent: Tuesday, March 04, 2003 2:03 AM Subject: shutting down VLAN 1 [7:64334] Hi all, In the effort to avoid any Vlan spread in the entire campus (populated of more than 100 Cisco switches), I would like to shut down the Vlan 1 in every switch of my campus and create just small local management Vlans. Is there anything wrong in this operation? Does the CDP exchange messages on Vlan 1? and does the CiscoWorks2000 exchange messages on Vlan 1? Best regards, Luca Ciasca Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=64443&t=64334 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
