Date: Tue, 23 Jul 1996 07:33:27 -0500 (CDT) From: Mark Tinguely <tinguely@plains.nodak.edu> To: pete@sms.fi Cc: freebsd-atm@freebsd.org, freebsd-hacker@freebsd.org Subject: Re: freebsd-hackers ATM-FR virtual interface Message-ID: <199607231233.HAA19304@plains.nodak.edu>
next in thread | raw e-mail | index | archive | help
> To throw my opinion into the game since I consider that I've seen most > what the boxes do today and how they are being used is that there is > different scenarios where you want to either group (group == >=1 VC's) > for a NBMA logical interface, have a point-to-point logical interface > (with broadcast capability) on a single VC or have a point-to-point or > NBMA interface with dynamically established connections. All these > should have the possibility of having multiple VC's for a single > destination with variance in QoS. Throwing LANE into the game you also > have to support logical broadcast interface with ARP. > > Unclear enough? :-) A single network session mapped into a single VC is a trend (Ipsilon licensed software with DEC, et al) to use the ATM switch as a IP switch. I think multiple IP VCs between two hosts will be very common. The original question was should: 1) each LANE/IP VC be viewed as a seperate addreable interface. If we have two paths between the same hosts, we have two adapters (atm0, atm1, etc) between the two hosts. 2) an ATM adapter be viewed as a mega-virtual IP adapter that can multiple IP/MAC address (ie., one adapter one name, no matter the LAN setup). 3) the ATM virtual IP adapter has a single IP/MAC number which is made up of all the VC that contain that local IP/MAC address. It is possible for a single ATM card could have multiple virtual IP adapters. This combines all VCs that make a emulated IP conection into a single virtual adapter. Multiple VC beween hosts will use the same virtual adapter; If you use different emulated networks for two sessions they belong to different virtual adapters eventhough they bot use the same ATM adpater. I switched my mind from option 2 to option 3. --mark.
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199607231233.HAA19304>