Point-To-Point (P2P) Redundant Connection Across Layer 2/3 Vpn Network; Figure 29: P2P Redundant Connection Through A Layer 2 Vpn Network - Alcatel-Lucent 7750 Configuration Manual

Multi-Chassis LAG

Point-to-Point (p2p) Redundant Connection Across Layer 2/3 VPN Network

Active
Inter-chassis
MSAN
Standby
Active
Inter-chassis
MSAN
Standby

Figure 29: P2P Redundant Connection Through a Layer 2 VPN Network

Figure 29
based on Layer 2/3 VPN pseudo-wires. The connection between MSAN and a pair of PE routers is
realized by MC-LAG. From MSAN perspective, redundant pair of PE routers acts as a single
partner in LACP negotiation. At any point in time, only one of the routers has an active link(s) in a
given LAG. The status of LAG links is reflected in status signaling of pseudo-wires set between all
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Aggregation
node
Active
A
PW for VLL
Standby
Aggregation
Standby
node
B
Aggregation
node
A
PW for VLL
Aggregation
node
B
shows the connection between two multi-service access nodes (MSANs) across network
TLDP
Standby
Active Standby
Active
Active
TLDP
7750 SR Interface Configuration Guide
Aggregation
node
C
Standby
Inter-chassis
MSAN
PW for VLL
Active
Aggregation
node
C
Aggregation
node
C
Standby
Inter-chassis
MSAN
PW for VLL
Active
Aggregation
node
C
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