You will want to bump up the N1 parameter for sure. This normally defaults to 8 X MTU= 12016. If you are talking PU4 to PU4 then you will want to set it to somewhere like 32768. The command is and interface command on the serial 'sdlc n1 32768'. The N1 is the maximum size incoming frame. The doco states that 12000 is the maximum, but Cisco TAC (IBM group) says it will go higher and recommends it for PU4 to PU4. Hope this helps. David Carlson Qwest Communications "U S West is now Qwest" 600 Stinson Blvd, NE Suite 1 South Minneapolis, MN 55413 Phone: 612.664.3790 Fax: 612.664.4779 Pager: 877.406.4134 E-Page: [EMAIL PROTECTED] -----Original Message----- From: Andy Xing [mailto:[EMAIL PROTECTED]] Sent: Monday, July 17, 2000 4:22 AM To: [EMAIL PROTECTED] Subject: Re: How to setup the SDLC inetrface vmav&partnet mac address? All of the examples is about how to connect a controller(like 5394,5494 etc) to a host, But our situation is how to connect two hosts, Is there any difference with our situation? "D. J. Jones" <[EMAIL PROTECTED]> wrote in message 8ktjn8$ocp$[EMAIL PROTECTED]">news:8ktjn8$ocp$[EMAIL PROTECTED]... > Try this link first Andy: > > http://www.cisco.com/warp/public/488/39.html > > The following link shows a number of STUN, SDLC and SDLLC sampe configs: > > http://www.cisco.com/warp/public/488/12.html > > Hope you get your issue(s) resolved..dj > ___________________________________ 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] ___________________________________ 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]