# Before You Configure IP

Before you configure IP, created lower-layer interfaces over which IP traffic flows.

For example, to configure an ATM interface:

host1(config)#interface atm 1/0 host1(config-if)#atm sonet stm-1 host1(config-if)#no loopback host1(config-if)#atm clock internal chassis host1(config-if)#interface atm 1/0.10 host1(config-if)#atm pvc 10 0 20 aal5snap

Refer to the appropriate chapters for information about configuring a specific type of interface.

| Note: If you choose to configure VRRP, we recommend that you complete all IP address configurations before you configure VRRP. See JunosE Services Availability Configuration Guide, for additional information.