[j-nsp] Splitting E1 possibility in Juniper?

[Tim Nagy]

Hi Fredrik,

You should be able to do it if you're running PPP, Frame Relay, or Cisco
HDLC on those timeslots. You'd need to configure the ds, ce1, or e1
interfaces as required, add the appropriate encapsulation with "ccc", and
then configure local interface switching.

Here's an example that was done using frame relay with a Channelized DS3
interface, but the principle is the same:

interfaces {
    ct3-1/0/0 {
        partition 1 interface-type ct1;
    }
    ct1-1/0/0:1 {
        partition 1 timeslots 1-10 interface-type ds;
        partition 2 timeslots 11-24 interface-type ds;
    }
    ds-1/0/0:1:1 {
        encapsulation frame-relay-ccc;
    }
    ds-1/0/0:1:2 {
        encapsulation frame-relay-ccc;
    }
    ct3-1/0/1 {
        partition 1 interface-type ct1;
    }
    ct1-1/0/1:1 {
        partition 1 timeslots 1-10 interface-type ds;
    }
    ds-1/0/1:1:1 {
        encapsulation frame-relay-ccc;
    }
    ct3-1/0/2 {     
        partition 1 interface-type ct1;
    }
    ct1-1/0/2:1 {
        partition 1 timeslots 1-14 interface-type ds;
    }
    ds-1/0/2:1:1 {
        encapsulation frame-relay-ccc;
    }
}
protocols {
    mpls {
        interface lo0.0;
    }
    l2circuit {
        local-switching {
            interface ds-1/0/0:1:1.0 {
                end-interface {
                    interface ds-1/0/1:1:1.0;
                }
            }
            interface ds-1/0/0:1:2.0 {
                end-interface {
                    interface ds-1/0/2:1:1.0;
                }
            }
        }
    }
}

I included MPLS on lo0.0 because you'll get a commit error if you don't have
MPLS enabled on the router. 

Let us know how that goes.

Regards,
Tim

-----Original Message-----
From: juniper-nsp-bounces at puck.nether.net
[mailto:juniper-nsp-bounces at puck.nether.net] On Behalf Of F J
Sent: 06 February 2007 4:08 PM
To: juniper-nsp at puck.nether.net
Subject: [j-nsp] Splitting E1 possibility in Juniper?

Hi!
Here is a tricky one... or?

I have an M20 with one e1 PIC with four E1-interfaces.

On interface 0 in the E1-PIC I recieve 32 timeslots.

Is it somehow possible to "split" those incoming 32 timeslots and deliever 
the first 10 timeslots to port 1 and the remaining 22 timeslots to port 2 in

my E1-PIC?

I don't want to solve this by layer3 routing. I just want my M20 to split 
the E1. The M20 should be totally "invisible" for my devices behind port 1 
and port 2. They just want to recieve a specific range of timeslots...

I know I must have additional PICs if I want to bundle several E1 ports but 
I can't find anything that would solve my task described above...

Best Regards
/// Fredrik

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