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Configuring PPP over a Serial Interface
Before you configure a PPP interface, configure the interface or tunnel over which PPP traffic will flow. The procedures described in this topic assume that a physical interface has been configured. See the following chapters for additional information:
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- Configuring Channelized T3 Interfaces in JunosE Physical Layer Configuration Guide
- Configuring T3 and E3 Interfaces in JunosE Physical Layer Configuration Guide
- Configuring Unchannelized OCx/STMx Interfaces in JunosE Physical Layer Configuration Guide
- Managing Tunnel-Service and IPsec-Service Interfaces in JunosE Physical Layer Configuration Guide
To configure PPP over a serial interface:
- From Global Configuration mode, specify the physical interface
on which you want to configure PPP.host1(config)#interface serial 3/0:2/5
- Specify PPP as the encapsulation method (data-link protocol)
on the interface.host1(config-if)#encapsulation ppp
- Assign an IP address and subnet mask for the interface.host1(config-if)#ip address 192.168.22.10 255.255.255.0
- (Optional)
Configure the packet over SONET (POS) interface on which PPP encapsulation
is configured to transition to the up state only when the NCP packets
are received in a sequence. If you configure this setting, the PPP
sessions are not established if the NCP packets arrive in an out-of-order
format. By default, the capability to establish PPP sessions only
when the NCP packets arrive in a sequence is configured.
Note: This step applies only if you configure the physical interface in Step 1 of this procedure as a POS interface by using the interface pos command. Otherwise, it is not required to set the POS interfaces with PPP encapsulation with this option on sequencing of NCP packets.
host1(config)#ppp ncp-Ordering-Required - Verify that your configuration changes are correct.host1#show ppp interface serial 3/0:2/5 config
