Re: Frame-Relay dlci Confusion

From: Fahad Khan (fahad.khan@gmail.com)
Date: Fri Nov 21 2008 - 08:19:38 ARST


So what dear,

On R3 you will get like this,

R3#sh frame-relay map
Serial1/0 (up): ip 10.1.1.1 dlci 102(0x66,0x1860), dynamic,
              broadcast,, status defined, active
Serial1/0 (up): ip 10.1.1.2 dlci 103(0x67,0x1870), dynamic,
              broadcast,, status defined, active

R3#sh fram pvc

PVC Statistics for interface Serial1/0 (Frame Relay DTE)

              Active Inactive Deleted Static
  Local 2 0 0 0
  Switched 0 0 0 0
  Unused 0 0 0 0

DLCI = 102, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE = Serial1/0

  input pkts 247 output pkts 199 in bytes 19290
  out bytes 16634 dropped pkts 0 in pkts dropped 0
  out pkts dropped 0 out bytes dropped 0
  in FECN pkts 0 in BECN pkts 0 out FECN pkts 0
  out BECN pkts 0 in DE pkts 0 out DE pkts 0
  out bcast pkts 61 out bcast bytes 5056
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
  pvc create time 00:11:54, last time pvc status changed 00:10:54

DLCI = 103, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE = Serial1/0

  input pkts 342 output pkts 182 in bytes 23788
  out bytes 15488 dropped pkts 0 in pkts dropped 0
  out pkts dropped 0 out bytes dropped 0
  in FECN pkts 0 in BECN pkts 0 out FECN pkts 0
  out BECN pkts 0 in DE pkts 0 out DE pkts 0
  out bcast pkts 76 out bcast bytes 5416
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
  pvc create time 00:11:57, last time pvc status changed 00:10:57
*and on R1:*

R1#sh frame-relay map
Serial1/0 (up): ip 10.1.1.3 dlci 201(0xC9,0x3090), static,
              broadcast,
              CISCO, status defined, active
Serial1/0 (up): ip 10.1.1.2 dlci 201(0xC9,0x3090), static,
              CISCO, status defined, active

R1#sh fram pvc

PVC Statistics for interface Serial1/0 (Frame Relay DTE)

              Active Inactive Deleted Static
  Local 1 0 0 0
  Switched 0 0 0 0
  Unused 0 0 0 0

DLCI = 201, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE = Serial1/0

  input pkts 92 output pkts 292 in bytes 7214
  out bytes 23048 dropped pkts 0 in pkts dropped 0
  out pkts dropped 0 out bytes dropped 0
  in FECN pkts 0 in BECN pkts 0 out FECN pkts 0
  out BECN pkts 0 in DE pkts 0 out DE pkts 0
  out bcast pkts 66 out bcast bytes 5984
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
  pvc create time 00:14:03, last time pvc status changed 00:12:23

HTH
On 11/21/08, ZEESHAN SANAULLAH <zeeshan_dreamcatcher@hotmail.com> wrote:

> i forgot to mention that inverse arp is disabled to for the DLCIs between
> spokes.
>
>
> > Date: Fri, 21 Nov 2008 14:05:04 +0500
> > From: fahad.khan@gmail.com
> > To: zeeshan_dreamcatcher@hotmail.com
> > Subject: Re: Frame-Relay dlci Confusion
> > CC: ccielab@groupstudy.com; narbikk@gmail.com
> >
> > Dear Zeeshan,
> >
> > First of all, If I disable inverse-arp on R1 and R2, how will I be able
> to
> > learn DLCIs dynamically?
> >
> > Case 1: If the topology is full mesh, means there is a direct connection
> > (PVC) between R1 and R2, In this case "show frame-relay pvc" will provide
> > the information of two PVCs (active) on each router.
> >
> > Case 2: If R1 can only get to R2 via R3 (Hub) ,then on R1 and R2 , you
> will
> > get only one PVC info (towards R3) by "sh fram pvc".
> >
> > Note: In both cases, you may found "Inactive" PVCs (got from FR switch)
> > whose mappings (DLCI-IP) are not defined.
> >
> > HTH
> >
> >
> > On 11/21/08, ZEESHAN SANAULLAH <zeeshan_dreamcatcher@hotmail.com> wrote:
> > >
> > > Hello GS !!!!
> > >
> > > I am a little confused in this basic thing regarding frame-relay dlci.
> > >
> > > Lets take 3 routers R1,R2,R3
> > >
> > > R3 is the HUB and R1 and R2 are spokes
> > >
> > > The Frame-Relay switch is configured in a full mesh configuration.
> > >
> > > But the task asks to configure the routers in Hub and Spoke manner.
> > >
> > > R1 , R2 and R3 must have ip 10.1.1.1/24 and 10.1.1.2/24 and
> 10.1.1.3/24
> > > respectively.
> > >
> > > Disable inverse-arp on R1 and R2 so that they only learn dynamic
> mapping
> to
> > > R3
> > >
> > > All config is to be done on Main interfaces.
> > >
> > > Now the confusion is that ... when all configs are done correctly.
> > >
> > > what must be the output of show frame-relay pvc command.
> > >
> > > i mean R1 and R2 must have learned two dlci.
> > >
> > > The one to R3 must be active........
> > >
> > > what about the other ???? the one between R1 and R2.
> > >
> > > What i get in Lab is some times it is unused but active and sometimes
> used
> > > and
> > > active as well.
> > >
> > > any idea ??
> > >
> > > Regards
> > > Zeeshan
> > >
> > >
> > >
> > >
> > >
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> >
> > --
> > Fahad Khan
> > http://fahad-internetworker.blogspot.com
> >
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-- 
Fahad Khan
http://fahad-internetworker.blogspot.com

Blogs and organic groups at http://www.ccie.net



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