Alcatel-Lucent 7750 SR OS - Point-To-Point (P2 P) Redundant Connection Across Layer 2 VPN Network; Figure 26: P2 P Redundant Connection through a Layer 2 VPN Network

Interface Configuration
7750 SR OS Interface Configuration Guide Page 121
Point-to-Point (p2p) Redundant Connection Across Layer 2 VPN Network
Figure 26: P2P Redundant Connection Through a Layer 2 VPN Network
Figure 26 shows the connection between two multi-service access nodes (MSANs) across network
based on Layer 2 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
OSSG116
Aggregation
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Aggregation
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MSANMSAN
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Aggregation
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Inter-chassis
PW for VLL
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Active
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Standby
Standby
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TLDP
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Aggregation
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Aggregation
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MSANMSAN
Aggregation
node
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Aggregation
node
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Inter-chassis
PW for VLL
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Standby
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Active
Inter-chassis
PW for VLL