I worked with some WAN implementations (not Cisco equipment) where the traffic was unidirectional, probably for QoS and/or billing purposes.
""Zsombor Papp"" wrote in message news:[EMAIL PROTECTED] > At 07:56 PM 6/24/2003 +0000, annlee wrote: > >Even if it is "switched from spoke-to-spoke", at Layer 1 the spokes connect > >via the hub. And to do anything with the traffic, Layer 2 must be > >consulted -- which gives us Priscilla's DLCI switching table. And, unless > >the traffic is unidirectional, you will need DLCIs for the opposite > >direction, as well. I don't know Cisco FR that well, but in at least some > >vendors' FR implementations, the "return" DLCIs do not have to have the same > >numbers as the "forward" ones. > > The two DLCIs that identify the two ends of a PVC to the user('s routers) > don't have to be the same. However a PVC always provides bidirectional > connection, AFAIK, so regardless of implementation you will be able to send > traffic in both directions. Are you saying that in some cases you might > need a total of 4 DLCIs to establish one bidirectional connections between > two routers? Why would this be an advantage? > > Thanks, > > Zsombor > > > That actually enables you to number according > >to a pattern which indicates connectionality. And it also makes the DLCI > >switching table twice the size that Priscilla showed. > > > >Annlee > > > >""Larry Letterman"" wrote in message > >news:[EMAIL PROTECTED] > > > My opinion is that it will go to the hub site since it's a point to > > > point network.. > > > If the hub were to be a multi-point connection to the spokes, which > > > would be one network, > > > Then the traffic could be switched from spoke to spoke... > > > > > > > > > Larry Letterman > > > Cisco Systems > > > > > > > > > > > > > > > -----Original Message----- > > > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of > > > Aaron Ajello > > > Sent: Tuesday, June 24, 2003 10:06 AM > > > To: [EMAIL PROTECTED] > > > Subject: FR concept question [7:71263] > > > > > > > > > This is probably a very simple concept question, but I've asked a couple > > > people and haven't gotten a solid answer. > > > > > > If I've got two frame relay spoke sites connected point to point with a > > > hub site and a server in one spoke site copies a file to a server in the > > > other spoke site, does all the traffic pass through the hub site, or is > > > it switched within the frame cloud? > > > > > > I guess what I'm wondering is does a frame cloud act somewhat like a > > > lan, where initially packets will go through the default gateway and be > > > routed and then the following packets will be switched? > > > > > > thanks. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=71304&t=71263 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
