From: MERRILL, JAMES D (AIT) (jm8752@xxxxxxx)
Date: Mon Mar 04 2002 - 09:56:02 GMT-3
You only need to change the Frame-relay intf-type if you want your router to
act as the frame switch. To date the exam doesn't have you do that. I
suppose they could but they have enough other things to test us on. Besides
if you have a lab at home you would need to be able to do that to practice
and they figure you'll know how.
My advice is to know how but don't expect it on the lab.
James D. Merrill
Design Engineer
SBC DataComm
-----Original Message-----
From: Yigit Zorlu [mailto:yigitzorlu@yahoo.com]
Sent: Saturday, March 02, 2002 7:54 AM
To: MERRILL, JAMES D (AIT); 'Don Banyong'; 'kym blair';
johnspencer@planet.nl; 'Hansang Bae'; ccielab@groupstudy.com
Subject: RE: Frame-Relay Intf-type DCE
Hi all,
I was digging the archieves and read mails about this topic. Now I have a
question
Which less frequently used command(s) may be required on the exam in FR
interfaces ? By remembering that FR switch config. can not be modified...
For example, in any case do we need to configure clockrate in the FR
encapsulated serial interfaces of lab routers ? I dont think so since it is
a layer 1 requirement, it has to be configured on the interface where DCE
end of the serial cable is attached which is FR switch. So they can not ask
that.
But what if they configure the serial interfaces in the FR switch
frame intf-type dte ???
Dont we need to configure frame intf-type dce in our fr interfaces of
routers ??
Or can they ask a question like this ? I think it is technically possible..
Any comments ?
yigit
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
MERRILL, JAMES D (AIT)
Sent: Wednesday, February 13, 2002 6:03 PM
To: Don Banyong; kym blair; johnspencer@planet.nl; Hansang Bae;
ccielab@groupstudy.com
Subject: RE: Frame-Relay Intf-type DCE
The Frame-relay intf-type DTE is the default.
The only time I've used this command was when I connected my frame switch to
a real frame cloud. The example on the doc CD has it as a hybrid solution
were you connect to a frame switch but split PVCs off to other routers that
are connected by pt-to-pt connections.
James D. Merrill
-----Original Message-----
From: Don Banyong [mailto:don_study@hotmail.com]
Sent: Tuesday, February 12, 2002 4:13 PM
To: kym blair; johnspencer@planet.nl; Hansang Bae;
ccielab@groupstudy.com
Subject: Re: Frame-Relay Intf-type DCE
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 13 2002 - 10:56:52 GMT-3