Hi, I am trying to establish dot1q trunking between Cat6506 and Cat3548 switches. As soon as I connect these switches using a cross-over cable, the C3548 switch does not recognise the packets coming from C6506. First, I tried to configure ISL trunking in the Cat3548 switch using "switchport trunk encapsulation isl" command in the interface configuration mode, it accepted the command silently (mean without any error). But the line is missing in the running-configuration. Note: Cat3548 is using IOS based software. Both the switches are using the latest software versions. How can I solve this issue? Thanks in advance, TVS -------------- _____________________________________________________________________ <html><body bgcolor="ffffff"> <table border="0" width="90%" cellspacing="0" ><td width="100%" bgcolor="#EBEBEB"><font face="Arial,Verdana,Times New Roman" size="2"><p align="center"><b><font color="#000000">India's first </font><font color="#FF0000">Indian Language Mailing System</font><font color="#000000">.<br> Open your </font><font color="#FF0000">FREE e-mail account</font><font color="#000000"> at <a href="http://www.epatra.com" target="_blank">http://www.epatra.com</a> today !!!</font></b></p></font></td></table> </body></html> ___________________________________ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]