From owner-freebsd-atm Thu Apr 5 11: 7:18 2001 Delivered-To: freebsd-atm@freebsd.org Received: from mail.matriplex.com (ns1.matriplex.com [208.131.42.8]) by hub.freebsd.org (Postfix) with ESMTP id 62E4A37B449 for ; Thu, 5 Apr 2001 11:07:16 -0700 (PDT) (envelope-from rh@matriplex.com) Received: from mail.matriplex.com (mail.matriplex.com [208.131.42.9]) by mail.matriplex.com (8.9.2/8.9.2) with ESMTP id LAA46493; Thu, 5 Apr 2001 11:06:56 -0700 (PDT) (envelope-from rh@matriplex.com) Date: Thu, 5 Apr 2001 11:06:56 -0700 (PDT) From: Richard Hodges To: Joe Thomas Cc: "'Alex Huppenthal'" , Harti Brandt , freebsd-atm@FreeBSD.ORG Subject: RE: ATM 4.3 and so on In-Reply-To: <67DB78CE91D7D41190A100508BFDF5E051EF14@esply03.cnt.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-atm@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org On Thu, 5 Apr 2001, Joe Thomas wrote: > Some thoughts on all the different HARP discussions: > > I'd be surprised if FORE is doing multi-VC rate control on the > adapter UNLESS they're running a newer version of the microcode than > what was available when HARP was developed. On transmit, there is a > single transmit queue which acts as PDU fifo. Each PDU in has its own > rate info (transmit M cells followed by N idle cells) and each PDU was > transmitted to completion before the next PDU was examined. This doesn't > allow the adapter to intermix cells from different VCs in the output > stream. Thanks, that clarifies the problem quite a bit. In a way, maybe this is actually helpful... Alex, if you make the change to apply the rate control value to outbound PDUs, that should throttle the whole interface down to whatever cell rate you want. You will probably still get cell bursts, but cell buffers in the switch may smooth this out for you. Thanks, -Richard ------------------------------------------- Richard Hodges | Matriplex, inc. Product Manager | 769 Basque Way rh@matriplex.com | Carson City, NV 89706 775-886-6477 | www.matriplex.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-atm" in the body of the message