IP Interworking VLL (Ipipe) Services
Page 168 7705 SAR OS Services Guide
IP Interworking VLL (Ipipe) Services
This section provides information about the Ipipe service.
Topics in this section include:
• Ipipe Service Overview
→ IP Interworking VLL Datapath
→ Control Word
→ IP Filters
Ipipe configuration information is found under the following topics:
• Common Configuration Tasks on page 198
• Configuring VLL Components on page 199
→ Creating an Ipipe Service on page 213
• Service Management Tasks on page 221
Ipipe Service Overview
An Ipipe pseudowire (IP PW) enables service interworking between different link layer
technologies and network interworking between connections with the same link layer
technologies. IP PWs provide an efficient means to connect Layer 3 IP traffic to the
IP/MPLS network, even without access to VLANs.
An Ipipe is a point-to-point Layer 2 service where the customer data is encapsulated and
transported across an MPLS or IP network. An Ipipe service transparently forwards all
packets received on one SAP to the other SAP. No native IP routing of customer packets
occurs.
IP interworking allows connections to be created with any combination of PPP, MLPPP, and
Ethernet SAPs, but the payload must always be IP. Ipipes can be used to transport IP
payloads more efficiently than Epipes because an Ipipe service does not need to forward the
Ethernet header information.
Figure 28 provides an example of IP connectivity between a host attached to a point-to-point
access circuit (PPP) with routed PDU IPv4 encapsulation and a host attached to an Ethernet
interface. Both hosts are on the same LAN segment.
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