Date: Tue, 29 Feb 2000 18:13:17 -0800 (PST) From: Hugh LaMaster <lamaster@nren.nasa.gov> To: Hirofumi ABE <abe.hirofumi@lab.ntt.co.jp> Cc: Kenjiro Cho <kjc@csl.sony.co.jp>, freebsd-atm@FreeBSD.ORG Subject: Re: Traffic shaping on HARP Message-ID: <Pine.GSO.4.05.10002291756110.4297-100000@kinkajou.arc.nasa.gov> In-Reply-To: <4.2.0.58.J.20000225124047.031acb10@imi.m.ecl.ntt.co.jp>
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On Fri, 25 Feb 2000, Hirofumi ABE wrote: > Date: Fri, 25 Feb 2000 12:56:46 +0900 > From: Hirofumi ABE <abe.hirofumi@lab.ntt.co.jp> > To: Kenjiro Cho <kjc@csl.sony.co.jp>, freebsd-atm@FreeBSD.ORG > Cc: abe.hirofumi@lab.ntt.co.jp > Subject: Re: Traffic shaping on HARP > > At 20:51 00/02/24 +0900, Kenjiro Cho wrote: > > >Hirofumi ABE wrote: > > > I confirmed BSD box using en drivers can be connected through cisco4000. > > > This works very well when we use ping, telnet and http, but only ftp-data > > > doesn't. > > > The cisco seems to discard the data. > > > Why only ftp-data cause? > > > >Path MTU discovery? > > Thanks, I avoided the problem. > 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?) > Current configuration is following.. > > [Sender BSD] > ifconfig en0 inet 192.168.10.20 netmask 255.255.255.0 mtu 1500 up > route add -iface cisco64 -link en0:3.0.0.40 > pvctxctl en0 64 -p 6975 > route add -net 192.168.65.0 -gateway cisco64 > > [Cisco] > enable > conf t > interface atm 0.5 point-to-point mtu 9180 > ip address 192.168.10.1 255.255.255.0 > atm pvc 64 0 64 aal5snap 3000 3000 3000 inarp > exit > interface atm 0.6 point-to-point > ip address 192.168.65.1 255.255.255.0 > atm pvc 64 0 64 aal5snap 3000 3000 3000 inarp > exit > disable > > [Receiver BSD] > ifconfig en0 inet 192.168.65.72 netmask 255.255.255.0 mtu 1500 up > route add -iface cisco65 -link en0:3.0.0.41 > pvctxctl en0 65 -p 6975 > route add -net 192.168.10.0 -gateway cisco65 > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-atm" in the body of the message > -- Hugh LaMaster, M/S 233-21, Email: lamaster@nren.nasa.gov NASA Ames Research Center Or: lamaster@nas.nasa.gov Moffett Field, CA 94035-1000 Or: lamaster@george.arc.nasa.gov Phone: 650/604-1056 Disc: Unofficial, personal *opinion*. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-atm" in the body of the message
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