Sap Encapsulations And Pseudowire Types - Alcatel-Lucent 7750 SR OS Service Manual

VLL Service Considerations
The simple three-node network described in
defined between the nodes. These SDPs connect VPLS1 and VPLS2 instances that are defined in
the three nodes. With this feature the operator will have local CLI based as well as SNMP based
statistics collection for each VC used in the SDPs. This will allow for traffic management of tunnel
usage by the different services and with aggregation the total tunnel usage.

SAP Encapsulations and Pseudowire Types

The 7750 SR Epipe service is designed to carry Ethernet frame payloads, so it can provide
connectivity between any two SAPs that pass Ethernet frames. The following SAP encapsulations
are supported on the 7750 SR Epipe service:
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Note that while different encapsulation types can be used, encapsulation mismatching can occur if
the encapsulation behavior is not understood by connecting devices and are unable to send and
receive the expected traffic. For example if the encapsulation type on one side of the Epipe is
dot1q and the other is null, tagged traffic received on the null SAP will be double tagged when it is
transmitted out of the dot1q SAP.
Page 144
Ethernet null
Ethernet dot1q
SONET/SDH BCP-null
SONET/SDH BCP-dot1q
ATM VC with RFC 2684 Ethernet-bridged encapsulation (see
on page 112)
FR VC with RFC 2427 Ethernet-bridged encapsulation (see
on page 112)
Figure 28 shows two MPLS SDPs and one GRE SDP
7750 SR OS Services Guide
Ethernet Interworking VLL
Ethernet Interworking VLL