[j-nsp] frame-relay encap on POS between Juniper and Cisco

Hannes Viertel hviertel at juniper.net
Mon Jul 19 05:30:57 EDT 2004


hi,

I also recommend you to hardcode the lmi-type on both sides.

Cisco is doing by default lmi-autosensing. Under some circumstances this
might introduce link and protocol flaps within your network the first
time the link comes up. 

the config should then look like :


  xx-0/2/0 {
        dce;
        encapsulation frame-relay;
	  ...
        lmi {
            lmi-type ansi;
        }
        unit 100 {
 			...
            }
        }
    }
interface POS8/1/0.100 point-to-point
ip address 81.1.1.1 255.255.255.0
frame-relay interface-dlci 100
frame-relay lmi-type ansi


cheers,
	hannes

> -----Original Message-----
> From: juniper-nsp-bounces at puck.nether.net 
> [mailto:juniper-nsp-bounces at puck.nether.net] On Behalf Of K Verma
> Sent: Montag, 19. Juli 2004 08:45
> To: jlablab at yahoo.com
> Cc: juniper-nsp at puck.nether.net
> Subject: Re: [j-nsp] frame-relay encap on POS between Juniper 
> and Cisco
> 
> 
> Hi,
> 
> Please remove "no keepalive" configuration from Cisco POS. It 
> should be:
> 
> interface POS8/1/0
>  no ip address
>  encapsulation frame-relay IETF
>  no ip mroute-cache
>  crc 32
>  pos scramble-atm
>  pos flag c2 22
> !
> interface POS8/1/0.100 point-to-point
>  ip address 81.1.1.1 255.255.255.0
>  frame-relay interface-dlci 100
> !
> 
> Hope, it will make ping to work. Juniper interface 
> configuration looks fine.
> 
> Thanks,
> KK
> 
> R Che wrote:
> 
> >I configured frame relay encapsulation on POS interface 
> between Juniper 
> >and Cisco routers. physical layer is up, but my pings don't 
> get through. When I changed to ppp or cisco-hdlc, pings went 
> through. so I don't think there is an issue with sonet layer.
> > 
> >here is my config on Juniper:
> >dce;
> >clocking internal;
> >encapsulation frame-relay;
> >sonet-options {
> >    rfc-2615;
> >}
> >unit 100 {
> >    point-to-point;
> >    dlci 100;
> >    family inet {
> >        address 81.1.1.2/24;
> >    }
> >}
> >
> >and this is my config on Cisco:
> >interface POS8/1/0
> > no ip address
> > encapsulation frame-relay IETF
> > no ip mroute-cache
> > no keepalive
> > crc 32
> > pos scramble-atm
> > pos flag c2 22
> >!
> >interface POS8/1/0.100 point-to-point
> > ip address 81.1.1.1 255.255.255.0
> > no keepalive
> > frame-relay interface-dlci 100
> >!
> >
> > 
> >
> >		
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