Frame-relay multipoint configuration & DLCIs
Guys, This time I have a question regarding mulipoint FR configuration. Her is the concern: int s 0/0.1 ip address 1.1.1.1 255.0.0.0 frame-relay map ip 2.2.2.2 200 broadcast frame-relay map ip 3.3.3.3 300 broadcast Is this configuration means that there are two PVCs from this source to two destinations(2.2.2.2 & 3.3.3.3)?. How come a single interface (s0/0.1) can have two DLCIs (200 & 300)? Or should I configure it this way int s 0/0.1 ip address 1.1.1.1 255.0.0.0 frame-relay map ip 2.2.2.2 200 broadcast int s 0/0.2 ip address 1.1.1.2 255.0.0.0 frame-relay map ip 3.3.3.3 300 broadcast I am trying to understand the benefit of the multipoint configuration. Could someone clairfy this Thanks I need to finish FR to start ISDN ! ___ Say Bye to Slow Internet! http://www.home.com/xinbox/signup.html ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Frame-relay multipoint configuration & DLCIs
On Tue, 18 Jul 2000, John lay wrote: > Guys, > > This time I have a question regarding mulipoint FR configuration. > Her is the concern: > int s 0/0.1 > ip address 1.1.1.1 255.0.0.0 > frame-relay map ip 2.2.2.2 200 broadcast > frame-relay map ip 3.3.3.3 300 broadcast > > Is this configuration means that there are two PVCs from this source to two > destinations(2.2.2.2 & 3.3.3.3)?. How come a single interface (s0/0.1) can > have two DLCIs (200 & 300)? A point to point interface can have only one PVC. A multipoint can have multiple PVC's. With multiple PVC's on an interface, you don't have to do DLCI mapping, because inverse arp will take care of it. Once subinterfaces are involved, as above, then you must do the maps you did. Frame-Relay is a multiple-access wan technology, so having multiple PVC's on an interface is valid. > > Or should I configure it this way > > int s 0/0.1 > ip address 1.1.1.1 255.0.0.0 > frame-relay map ip 2.2.2.2 200 broadcast > int s 0/0.2 > ip address 1.1.1.2 255.0.0.0 > frame-relay map ip 3.3.3.3 300 broadcast In my opinion you want the second way. You see, the reason you would put all PVC's under one interface, a multipoint interface, is mainly because your building a mesh or a semi-mesh, and you are using a single network. You are using two different Class A networks, and so two PtP interfaces are the way to go IMHO. Also be aware that the two ends of the links.whether it be a PtP or a multi-access link, should be in the same subnet, and in neither of your examples is this the case. > > I am trying to understand the benefit of the multipoint configuration. > Could someone clairfy this > > Thanks > I need to finish FR to start ISDN ! > > > > > > > ___ > Say Bye to Slow Internet! > http://www.home.com/xinbox/signup.html > > ___ > UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html > FAQ, list archives, and subscription info: http://www.groupstudy.com > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] > - Brian Feeny, CCNA [EMAIL PROTECTED] 318-222-2638 x 109 http://www.shreve.net/~signal Network Administrator ShreveNet Inc. (ASN 11881) ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: Frame-relay multipoint configuration & DLCIs
Really bu default both interface and subunterface are multipoint- so don'be confused with number of DLCIs- just remember about reachabelity issues- you'd have SINGLE LIS (logical ip subnet)- so if you use classless aproach or VLSM- think on yor routing protocol carefully- put attention on split-horizon and summarization issues! Then remember on maps- thay need to establish full mesh if you have a lot of money to buy VCs and want everything works ok. So let's read Caslows famous book- one chapter is completely dedicated to your question- "To map or not to map". Ruslan Tchinyakov, CCNP+Security, CCDP, MCSE -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of John lay Sent: Tuesday, July 18, 2000 10:57 PM To: [EMAIL PROTECTED] Subject: Frame-relay multipoint configuration & DLCIs Guys, This time I have a question regarding mulipoint FR configuration. Her is the concern: int s 0/0.1 ip address 1.1.1.1 255.0.0.0 frame-relay map ip 2.2.2.2 200 broadcast frame-relay map ip 3.3.3.3 300 broadcast Is this configuration means that there are two PVCs from this source to two destinations(2.2.2.2 & 3.3.3.3)?. How come a single interface (s0/0.1) can have two DLCIs (200 & 300)? Or should I configure it this way int s 0/0.1 ip address 1.1.1.1 255.0.0.0 frame-relay map ip 2.2.2.2 200 broadcast int s 0/0.2 ip address 1.1.1.2 255.0.0.0 frame-relay map ip 3.3.3.3 300 broadcast I am trying to understand the benefit of the multipoint configuration. Could someone clairfy this Thanks I need to finish FR to start ISDN ! ___ Say Bye to Slow Internet! http://www.home.com/xinbox/signup.html ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
