Date: Wed, 1 Mar 2000 14:06:28 -0600 (CST) From: Mike Spengler <mks@networkcs.com> To: lamaster@nren.nasa.gov (Hugh LaMaster) Cc: abe.hirofumi@lab.ntt.co.jp (Hirofumi ABE), kjc@csl.sony.co.jp (Kenjiro Cho), freebsd-atm@FreeBSD.ORG Subject: Re: Traffic shaping on HARP Message-ID: <200003012006.OAA95134@us.networkcs.com> In-Reply-To: <Pine.GSO.4.05.10002291756110.4297-100000@kinkajou.arc.nasa.gov> from "Hugh LaMaster" at Feb 29, 2000 06:13:17 PM
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Hugh LaMaster claims: > > > I can't decide which box is wrong BSD or cisco, but the MTU size of 9180 > > seems to have some problems. > > Cisco ATM MTU is 4470 by default; if you want 9180 you have > to state it explicitly. I believe that setting it to 9180 > can exacerbate problems with fast SRAM buffer exhaustion on > some configurations with lots of subinterfaces. POS also > defaults to 4470, though I believe that it can be set higher, > also to 9180, and the Cisco GigabitEthernet max MTU on some > new interfaces is 4470 (1500 on others), so, it seems that 4470 > is kind of a Cisco "standard". Do you need 9180 for a particular > reason or would 4470 do? (I think 9180 might be the Fore ATM > default? Does 9180 show up in an RFC somewhere?) > Yes. See RFC 2225, Section 7. -- Mike Spengler Network Computing Services, Inc. Email: mks@networkcs.com 1200 Washington Ave. So. Phone: +1 612 337 3557 Minneapolis MN 55415 FAX: +1 612 337 3400 (aka Minnesota Supercomputer Center) To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-atm" in the body of the message
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