Re: Frame-relay again

I put this in the lab and here are the results:

R1 ---- Frame Switch ----- R2

Frame Switch: DLCI Config
connect R1_R2 Serial1/0 102 Serial1/1 201

*****************************************************
LMI is ON everywhere...everything works as expected.
R2#ping 1.1.1.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 1.1.1.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 4/5/8 ms

****************************************************************
LMI is OFF on R1:
On R1:
int s0/0
no keepalive

When "no keepalive" is configured on R1, the frame-switch does this:
00:23:07: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/0, changed
state to down

PVC state on Frame Switch goes to Switched Inactive
PVC state on R1 is static
PVC state on R2 is Inactive
And, obviously, no ping works.
****************************************************************
LMI is OFF on R1 and R2:

On R1 and R2:
int s0/0
no keepalive

When no keepalive on R1 and R2 is configured, same result on Frame Switch:
00:27:27: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/1, changed
state to down

PVC state on Frame Switch goes to Switched Inactive
PVC state on R1 is static
PVC state on R2 is static
And, no ping works.
**************************************************************************************

LMI is OFF on R1, R2 and the Frame Switch:

Frame Switch immediately:
00:29:50: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/0, changed
state to up
00:29:58: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/1, changed
state to up

PVC state on Frame switch is ACTIVE SWITCHED
PVC state on R1 is LOCAL STATIC
PVC state on R2 is LOCAL STATIC

Ping works without issue:

R2#ping 1.1.1.1

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 1.1.1.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 4/5/8 ms

Hope this helps,

Chris

On Thu, Aug 26, 2010 at 6:58 AM, Marcelo Rosa <MRosa_at_multirede.com.br>wrote:

> I have to disagree. If you disable LMI on BOTH sides of the PVC, there Will
> be traffic running through. I tell this by Field experience. Nortel routers
> used to come with LMI disabled by default, and worked fine, as far as my
> experience goes. All you have to do is statically map the DLCI on the
> interface.
>
> -----Mensagem original-----
> De: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] Em nome de Narbik
> Kocharians
> Enviada em: quarta-feira, 25 de agosto de 2010 20:57
> Para: Carlos G Mendioroz
> Cc: Kambiz Agahian; selamat pagi; Cisco certification
> Assunto: Re: Frame-relay again
>
> Carlos,
>
> Our discussion here has nothing to do with Switch-Switch
> connection/communication or Route reflectors or the NAP so why confuse this
> gentlman. We are disabling the LMIs on the router and NOT the switch.
>
> It was a very basic question, you have R1 connecting to R2 through frame
> switch, if you disable LMIs on one end let's say R1, the status of the PVC
> will go into "inactive" state on R2.
>
> R1 will NOT get ANY DLCI information from the switch, even if you try to
> ping R1 from R2, R1 will NOT see any packets coming from R2 (Through its
> DLCI), so that tells me that the Switch is NOT forwarding packets to R1.
> Even if you configure a frame-relay map statically on R1 for R2's IP
> address.
>
>
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Received on Thu Aug 26 2010 - 10:19:08 ART