hi All, Please tell me if I am wrong and best practices A trunk link, by default, is a member of all VLANS Would it be best practice, to place your trunk ports in a particualr VLAN, then define what you want pruned/not pruned ? Reason I ask is that I am getting the hostflapping error every now and then, which first made me believe I had a developer plugging in hubs around the place. However, now I think its a question of my design/config. Here is an example of the error on my cat-4006 gig ports which trunk to my floor switchs. Host 00:06:29:F9:75:A2 in vlan 23 is flapping between port Gi2/12 and port Gi2/11 NOTE: 2/12 go's to sw2 and 2/11 go's to sw1, which are connected to one another as you can see below I checked it out, there are no hubs any where that could do this, and I have spanning tree in place to stop the redundant links on my floor switch;s coming back into the core. Here is the config of my trunk ports on the floor switch SW1 interface GigabitEthernet0/1 description link to core switchport mode trunk no ip address ! interface GigabitEthernet0/2 description link to sw2 floor switch switchport mode trunk no ip address SW2 interface GigabitEthernet0/1 description link to core switchport mode trunk no ip address ! interface GigabitEthernet0/2 description link to sw1 floor switch switchport mode trunk no ip address
If any one can suggest anything, I would appreciate it (I am interested in the use of the bpdu-port guard, would this help here ?) Thanks John Sydney Australia ********************************************************************** This email message (and attachments) may contain information that is confidential to Solution 6. If you are not the intended recipient you cannot use, distribute or copy the message or attachments. In such a case, please notify the sender by return email immediately and erase all copies of the message and attachments. Opinions, conclusions and other information in this message and attachments that do not relate to the official business of Solution 6 are neither given nor endorsed by it. ********************************************************************* Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=66730&t=66730 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
