Thanks now I get it!!!! -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of Chuck Sent: Thursday, June 27, 2002 12:12 PM To: [EMAIL PROTECTED] Subject: Re: frame relay question [7:47498]
to the frame switch, each link can have the exact same dlci. if you have fooled with using cisco routers as frame switches, you will get the idea how this is possible. the programming instruction says ( in English ) "any frames using this port are dlci xx and if they are incoming, send them out that port as dlci yy" essentially, a frame PCV is a series of links, each of which has a unique identifier. cust_1---dlci_16--port_1_frameswitch_port_2----dlci_397---port_7_framesw itch _port_9---dlci_120----cust_1 cust_2---dlci_16--port_3_frameswitch_port_4----dlci_397---port_8_framesw itch _port_8---dlci_120----cust_2 the only thing that has to be unique in this situation is the port on the frame switch. along each link of the pvc, the dlci is unique only to that link. If any of these links were carrying multiple PVC's then there would be multiple and unique DLCI's for each PVC on that link. so yes, from the telco standpoint, it is far easier for the switch tech to use the same methodology, and far easier for the telco to have some standard practice. my experience is the telco's really hate it when customers start asking for unique dlci numbering systems. plus it is likely that it will take longer for your link to get working right, and you will have to spend time arguing with the switch tech. ""Kelly Cobean"" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > You know, this brings up a good question...My company has sites all across > the country, and for every spoke site, we were able to get the exact same > DLCI, and at the hubs, we were able to get a range of DLCI's in increments > of 5 going out to each of the spokes. How is this possible? I completely > understand that the DLCI is locally significant, and that it only defines > the connection between the Frame switch and the customer CPE, but what are > the odds of the exact same DLCI on so many different switches being > available? Maybe there is something relevant to the fact that the carrier's > network is actually using ATM that makes this possible? Thanks! > > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of > Chuck > Sent: Wednesday, June 26, 2002 3:09 PM > To: [EMAIL PROTECTED] > Subject: Re: frame relay question [7:47498] > > > good questions. > > in theory, you may request any dlci you wish, so long as it is in the legal > range for the carrier. this would be numbers 16 through 996? for some, or > through 1004? for others > > in fact, if you have a good rapport with your carrier, and they in turn have > their act together, this is common practice. > > OTOH, in my experience, telcos just want to get the work done, and they will > configure the dlci starting with 16 because it's easy to remember. the > switch techs just bang out their configs with no conscious thought > intervention. > > if you have nothing fancy going on ( and it appears you don't ) the only > required configuration on your router is setting the frame relay > encapsulation, and setting the ip address. at that point the circuit will > come up. you can check this using the show frame pvc, show frame lmi and > show ip interface brief commands. lmi will detect and use the single pvc > with no other tweaks required. if you have multiple pvcs on a circuit, you > would, of course have to use frame map commands, or use point-to-point > subinterfaces in conjunction with the frame interface-dlci command. > > best wishes. > > > ""GEORGE"" wrote in message > [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > > I have a newbie question, regarding frame-relay. When I order a frame > > relay circuit for two locations > > Do the telco provide the dlci? Or I make it up? Once the frame relay is > > installed on both locations I guess using the dlci numbers it makes the > > connection , besides the ip and all other stuff > > Can someone explain it please > > thanks Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=47607&t=47498 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
