RE: frame relay question [7:47498]
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=7i=47549t=47498 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: frame relay question [7:47498]
Having worked building a Carrier's ATM-F/R backbone, I can tell you that the scenario you posted isn't as unique as it may seem. First of all, as you stated correctly, DLCIs are locally significant on a per INTERFACE basis. That concept applies to both, the WAN switch and the CPE. Carrier's WAN Switches typically have plenty of INTERFACES (physical ports) to provision customer PVCs on. Therefore, Carriers can provision as many DLCI=16 for instance, as F/R interfaces each WAN Switch has. At the hub location, the Carrier most likely will assign you a brand new Interface (physical port). Therefore, you the customer, have the entire range of DLCIs to request from the Carrier (16 through 1007 on Cisco WAN switches). There are WAN Switch Module DLCI limitations, depending on what type and brand of WAN switch Carries use. At each of the spoke locations, depending on the CIR your particular PVCs require, the Carrier will either provision your PVC on an existing but under-utilized Interface (meaning that you may or not get the DLCI you want, although most likely you'll get what you ask for). Or if your PVC's CIR is fat enough, it will be provisioned on a brand new Interface. Therefore, you'll get any DLCI you want or ask for, provided that the Carrier's DCLI policy allows it, and most do I believe. Now, mapping customer's F/R PVC DLCIs to ATM PVI/VCIs is a whole lot different beast on its own. But, that doen't have anything to do with assigning similar DLCIs at the spoke sites. Hth, Thanks, Angel -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Kelly Cobean Sent: Thursday, June 27, 2002 7:08 AM To: [EMAIL PROTECTED] Subject: RE: frame relay question [7:47498] 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=7i=47563t=47498 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
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_2dlci_397---port_7_frameswitch _port_9---dlci_120cust_1 cust_2---dlci_16--port_3_frameswitch_port_4dlci_397---port_8_frameswitch _port_8---dlci_120cust_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=7i=47578t=47498 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
FW: frame relay question [7:47498]
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_2dlci_397---port_7_framesw itch _port_9---dlci_120cust_1 cust_2---dlci_16--port_3_frameswitch_port_4dlci_397---port_8_framesw itch _port_8---dlci_120cust_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=7i=47607t=47498 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
frame relay question [7:47498]
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=7i=47498t=47498 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: frame relay question [7:47498]
The Telco's usually provide the DLCI. They provide two separate DLCI's, one for each side. Then they map the DLCI to the other DLCI, usually over ATM PVC's, but it could be IP as well. Steve 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=7i=47499t=47498 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
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=7i=47500t=47498 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: frame relay question [7:47498]
You can specify the dlci or they can assign. I always found it advantageous to specify that way I can set ranges for different areas or purposes... 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 [EMAIL PROTECTED] Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=47501t=47498 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: frame relay question [7:47498]
either way. You can provide DLCI's or you can have them assigned to you. They are locally specific. Some companies like having there own range of DLCI's for admin and management purposes. GEORGE 06/26 2:35 PM 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=7i=47504t=47498 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
