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Configuring EtoPPP and EtoFR
Ethernet to PPP (EtoPPP) converts on the data link layer between Ethernet and PPP for IP packets.
Similarly, Ethernet to Frame Relay (EtoFR) converts on the link layer between Ethernet and Frame
Relay for IP packets. With EtoPPP or EtoFR, a device encapsulates an Ethernet-encapsulated IP
packet with PPP or FR encapsulation, and then forwards the packet rather than routes the packet.
EtoPPP and EtoFR achieves high-performance Layer 2 switching between different types of links.
Hardware compatibility with EtoFR
EtoFR is not available on the following routers:
• MSR900.
• MSR93X except for JG514A, JG514B, JG515A, JG531A and JG531B.
How EtoPPP and EtoFR work
EtoPPP and EtoFR translation tables
EtoPPP or EtoFR is implemented through an EtoPPP or EtoFR translation table. This table is
manually configured for forwarding IP packets.
How EtoPPP and EtoFR handle IP packets
EtoPPP handles an IP packet as follows:
1. When an Ethernet interface in the EtoPPP translation table receives an IP packet, the device
finds the outgoing interface by looking up the EtoPPP translation table, encapsulates the IP
packet with PPP, and then forwards the PPP-encapsulated IP packet out of the PPP interface.
2. When a PPP interface in the EtoPPP translation table receives an IP packet, the device finds
the outgoing Ethernet interface by looking up the EtoPPP translation table, encapsulates the IP
packet with Ethernet, and then forwards the Ethernet-encapsulated IP packet out of the
Ethernet interface.
EtoFR works in the same way as EtoPPP except the link layer encapsulation is converted between
Ethernet and FR.
EtoPPP and EtoFR only apply to IP packets. Configuring an interface to participate in EtoPPP or
EtoFR translation can result in dropping of non-IP data packets on the interface.
Hewlett Packard Enterprise recommends not assigning IP addresses to the interfaces used in the
EtoPPP or EtoFR translation table, because the IP address configuration not take effect.
To get the statistics about IP packets on a virtual or logical interface in the EtoPPP or EtoFR
translation table, use the display command for the EtoPPP or EtoFR translation table rather than
that for the virtual or logical interface.
The interfaces in the EtoPPP or EtoFR translation table do not support QoS in the inbound direction.
In the outbound direction, they support only rate limiting on the physical interfaces.
Creating an EtoPPP translation mapping
When you create an EtoPPP translation mapping, follow these guidelines:
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