Alcatel-Lucent 7750 SR - Figure 7: Multiple Saps on a Single Port;Channel; SONET;SDH Encapsulations

Page 42 7750 SR OS Services Guide
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.
Figure 7: Multiple SAPs on a Single Port/Channel
OSSG003
Customer
27
Network
SAP
2/1/5
dot1q
PORT #1
SAP
3/1/6
dot1q
Service
Service
SDP
Customer
27
SAP
1/2/3
dot1q
Customer
9