Sonet/Sdh Encapsulations; Figure 7: Multiple Saps On A Single Port/Channel - Alcatel-Lucent 7750 SR Manual

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SONET/SDH Encapsulations

There are several encapsulation service options on SONET/SDH channels:

Internet Protocol Control Protocol (IPCP) — Supports a single IP service on a SONET/

SDH port or a single service per channel (if the interface is channelized). This is typically

used for router interconnection using point-to-point protocol (PPP).

Bridging Control Protocol (BCP-null) — Supports a single service on the SONET/SDH

port or a single service per channel (if the interface is channelized). This is used for

bridging a single service between two devices using PPP over SONET/SDH. The

encapsulation ID is always 0 (zero).

Bridging Control Protocol (BCP-dot1q) — Supports multiple services on the SONET/

SDH port/channel. This encapsulation type is used for bridging multiple services between

two devices using PPP over SONET/SDH. The encapsulation ID used to distinguish

services is the VLAN ID in the IEEE 802.1Q header in the BCP-encapsulated frame.

ATM — ATM, ATM-FR, ATM SAP-bridge encapsulation termination Epipe and VPLS.

Frame Relay — Supports the switched data link layer protocol that handles multiple

virtual circuits.

7750 SR OS Services Guide