The spokes only connect via the hub if you don't have a PVC between the spokes. It doesn't matter if your uni or bi, you have 2 DLCI's per PVC, one on each end. In our frame network we using local addressing of DLCI's, DLCI 16 could be on both ends of a PVC. Some carries use what is called global which I think you may be refering to. The users don't have control of the DLCI numbering if connecting to the public frame network but can request DLCI's which we can usually accomodate. I have no idea what a "forward" and "return" DLCI is!?!
Dave 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. 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. -- David Madland CCIE# 2016 Sr. Network Engineer Qwest Communications 612-664-3367 "Government can do something for the people only in proportion as it can do something to the people." -- Thomas Jefferson Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=71303&t=71263 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
