From: Don Banyong (don_study@xxxxxxxxxxx)
Date: Tue Feb 12 2002 - 19:12:53 GMT-3
Hello y'all.
I have am still not sure if we have learnt anything new here.
Pasted below, is the config of my three routers r1, r3 and r4 connected to a
2610 with three serial interfaces (two of which are syncronous smart
serials). Pay attention to the physical (layer 1) DCE and DTE and also of
the FR DCE intf.
r1:
hostname r1
interface Serial0
no ip address
encapsulation frame-relay
no keepalive
clockrate 64000
!
interface Serial0.1 point-to-point
ip address 172.16.0.1 255.255.255.252
frame-relay interface-dlci 102
!
interface Serial1
no ip address
encapsulation frame-relay
!
interface Serial1.1 point-to-point
ip address 172.16.96.1 255.255.255.252
frame-relay interface-dlci 104
!
interface Serial1.2 point-to-point
ip address 172.16.64.1 255.255.255.252
frame-relay interface-dlci 103
end
r3:
!
interface Serial0.1 point-to-point
ip address 172.16.64.2 255.255.255.252
no cdp enable
frame-relay interface-dlci 301
!
interface Serial0.2 point-to-point
ip address 172.16.80.2 255.255.255.252
no cdp enable
frame-relay interface-dlci 304
!
interface Serial1
no ip address
shutdown
no cdp enable
end
r4:
interface Serial0
no ip address
encapsulation frame-relay
no ip route-cache
no ip mroute-cache
clockrate 64000
!
interface Serial0.1 point-to-point
ip address 172.16.96.2 255.255.255.252
no ip route-cache
frame-relay interface-dlci 401
!
interface Serial0.2 point-to-point
ip address 172.16.80.1 255.255.255.252
frame-relay interface-dlci 403
no ip route-cache
end
fr-ts(frame-relay switch):
interface Serial0/0
no ip address
no ip directed-broadcast
encapsulation frame-relay
clockrate 64000
frame-relay intf-type dce
frame-relay route 103 interface Serial0/2 301
frame-relay route 104 interface Serial0/1 401
!
interface Serial0/1
no ip address
no ip directed-broadcast
encapsulation frame-relay
frame-relay intf-type dce
frame-relay route 401 interface Serial0/0 104
frame-relay route 403 interface Serial0/2 304
!
interface Serial0/2
no ip address
no ip directed-broadcast
encapsulation frame-relay
clockrate 64000
frame-relay intf-type dce
frame-relay route 301 interface Serial0/0 103
frame-relay route 304 interface Serial0/1 403
end
When cmd 'sh frame route' is issued on my frame-relay switch, the output is
Input Intf Input Dlci Output Intf Output Dlci Status
Serial0/0 103 Serial0/2 301 active
Serial0/0 104 Serial0/1 401 active
Serial0/1 401 Serial0/0 104 active
Serial0/1 403 Serial0/2 304 active
Serial0/2 301 Serial0/0 103 active
Serial0/2 304 Serial0/1 403 active
I should mention also that there is full connectivity between all three
routers (r1, r3 and r5 configured for full-mesh) verified by ping.
As noticed, the fr-ts router(frame relay switch) has command 'frame-relay
intf-type dce' on all three serial intfs even though its interface Serial0/1
is a DTE. Cisco also has a similar example on their website.
Again the question is when do you use the command 'frame-relay intf-type
DTE' command?
Thanks.
Don
----- Original Message -----
From: "kym blair" <kymblair@hotmail.com>
To: <johnspencer@planet.nl>; <hbae@nyc.rr.com>; <ccielab@groupstudy.com>
Sent: Sunday, February 10, 2002 6:31 AM
Subject: Re: Frame-Relay Intf-type DCE
> Hansang,
>
> I sometimes use "frame intf-type dte" on my Frame Relay switch.
>
> Most of the time I use a 2520 for my frame switch, and I put the DCE end
on
> the frame switch. But when I use my 2600 with WIC-2T modules for my frame
> switch, my smart-serial-to-DB60 cables have the DTE on the smart-serial
end,
> which I must attach to the 2620. Because of these cables, I have to make
my
> frame switch the DTE. The command is available and I use it with no
> problem.
>
> HTH, Kym
>
>
> >From: "John Spencer" <johnspencer@planet.nl>
> >Reply-To: "John Spencer" <johnspencer@planet.nl>
> >To: "Hansang Bae" <hbae@nyc.rr.com>, <ccielab@groupstudy.com>
> >Subject: Re: Frame-Relay Intf-type DCE
> >Date: Sun, 10 Feb 2002 11:42:48 +0100
> >
> >Here is a situation when you can use both frame intf-type dte and dce on
> >the
> >"frame relay switch"
> >
> >Lets say you have a 3640 or whatever. You create the frame relay routes
> >(switching paths ) from one interface to another eg serial 0/1 dlci 100
to
> >ser 1/0 dlci 110. Now what usually happens is you run from the interface
> >which is usually dce physical and intf-type dce to another router. But
> >instead you take a back to back cable and loop it between ser1/0 to say
ser
> >2/0 on the same router. Serial 2/0 now becomes the endpoint with ip
> >addresses and the termination point of the circuit. Here is where you
would
> >use frame-relay intf-type dte. Although it apparently should not make a
> >difference, in practice i would match physical and intf-type dce and dtes
> >together as I have found it can make a difference.
> >
> >Regards
> >John Spencer
> >
> >----- Original Message -----
> >From: "Hansang Bae" <hbae@nyc.rr.com>
> >To: <ccielab@groupstudy.com>
> >Sent: Saturday, February 09, 2002 6:46 AM
> >Subject: Re: Frame-Relay Intf-type DCE
> >
> >
> > > At 11:51 PM 2/8/2002 -0500, Don Banyong wrote:
> > > >You still did not answer my question. I completely understand the
layer
> >1
> > > >concept of DCE and DTE.
> > > >My question is -- in which scenario can someone use the Frame-relay
> > > >Intf-type DTE command ?
> > >
> > >
> > > When you hook up your router to a frame relay switch. This is the
> >default
> > > state. Type it in and you will not see it.
> > >
> > > hsb
This archive was generated by hypermail 2.1.4 : Thu Jun 20 2002 - 13:46:21 GMT-3