It's really not that hard and anyone responsible for maintaining and ERS 8600 should probably by familiar with the CLI interface.
Let me assume that you're going to connect an ES 470 on ports 1/1 and 7/1 using a MultiLink trunk bridging the Default VLAN (VLAN 1). Lets assume that the VLAN1 will be 10.1.1.0/24 and the switch interface will be 10.1.1.1/24.
config vlan 1 ip create 10.1.1.1/24
config mlt 1 create
config mlt 1 add vlan 1
config mlt 1 add ports 1/1,7.1
config mlt 1 perform-tagging enable
We should disable STP on the MLT uplink on the ERS 8600
config ethernet 1/1 stg 1 stp disable
config ethernet 7/1 stg 1 stp disable
Note: the ES470 does NOT support auto negotiation so we need to disable auto-negotiation on the ERS 8600 switch to prevent problems
config ethernet 1/1 auto-negotiate disable
config ethernet 7/1 auto-negotiate disable
You would then obviously need to configure the ES 470 with a MLT (probably using the two GBIC ports 47, 48). You could give the ES 470 and IP address of 10.1.1.5/24.
enable
config terminal
vlan ports 47,48 tagging enable
vlan mgmt 1
mlt 1 disable
mlt 1 name "MLT-8600"
mlt 1 member 47,48
mlt 1 learning disable
mlt 1 enable
ip address switch 10.1.1.5 netmask 255.255.255.0 default-gateway 10.1.1.1
You could as LEEroy suggested configure the out-of-band management ports on the 869xSF switch fabrics with the following commands. I believe the default IPs of the out-of-band management ports are;
192.168.168.168/24 869xSF Slot 5
192.168.168.169/24 869xSF Slot 6
You can change the default with the following command
config bootconfig net mgmt ip x.x.x.x/x
Hopefully that should give you a good idea of how to get started.
Cheers!