Juniper JUNOSE 11.2.X BGP AND MPLS, Configuration Manual

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raw ATM cells on these circuits and forward the cells without performing AAL5 packet
reassembly. The procedure also includes optional steps for configuring nondefault values
for the ATM Martini cell packing timers and cell concatenation parameters.
NOTE: Although this procedure uses AAL0 encapsulation to configure an MPLS
pseudowire (tunnel) connection between two ATM VCCs on different routers, you can
also use AAL0 encapsulation when you configure a local cross-connect between two
ATM 1483 subinterfaces within the same router.
To create an MPLS pseudowire connection with VCC cell relay encapsulation:
1.
(Optional) Configure values for the three ATM Martini cell packing timers on the
ingress router to define the cell collection time threshold.
host1(config)# atm mcpt-timers 1500 2500 3500
2.
Configure a loopback interface.
host1(config)# interface loopback 0
host1(config-if)# ip address 5.1.1.1 255.255.255.255
host1(config)# exit
3.
Create an ATM 1483 subinterface and ATM PVC with aal0 encapsulation on the
ingress interface.
host1(config)# interface atm 2/0.100
host1(config-subif)# atm pvc 100 0 100 aal0
4.
(Optional) Configure the following cell concatenation parameters for the ATM 1483
subinterface:
• Maximum number of ATM cells that the router can concatenate in a single packet
•
Identifier (1, 2, or 3) of the ATM Martini cell packing timer that you want to use to
detect timeout of the cell collection threshold
host1(config-subif)# atm cell-packing 100 mcpt-timer 2
5.
Create an MPLS relay connection to the loopback interface on the egress router. The
VC ID (1 in this example) must be the same on both sides of the connection.
host1(config-subif)# mpls-relay 6.1.1.1 1
host1(config-subif)# exit
6.
Repeat Steps 1 through 5 on the egress router, creating an MPLS relay connection
to the loopback interface on the ingress router.
The values you configure for the ATM Martini cell packing timers and cell
concatenation parameters need not be the same on the ingress and egress routers,
although matching values are permitted. The virtual connection ID (VC ID) value in
the
mpls-relay command, however, must be the same on the ingress and egress
routers.
host2(config)# atm mcpt-timers 1500 2500 3500
host2(config)# interface loopback 0
host2(config-if)# ip address 6.1.1.1 255.255.255.255
Copyright © 2010, Juniper Networks, Inc. 536
JunosE 11.2.x BGP and MPLS Configuration Guide