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Pseudo-wire "switching" model AS 1 AS 2 AC 1 AC 3 AC 4 AC 6 ASBR-1 ASBR-2 PE-1 PE-2 PE-3 PE-4 Pseudowire Pseudowire Attachment circuit LDP / L2TPv3 LDP / L2TPv3 Auto-discovery (MP-iBGP) Autodiscovery analogous to L3VPN Model (b) - eBGP used between ASBRs Limiting PW signaling to ASBRs gives control over policy and avoids mesh of PE-PE signaling Attachment circuit Auto-discovery (MP-iBGP) pwid 34 pwid 111 Auto-discovery (MP-eBGP) Pseudowire LDP / L2TPv3 pwid 78 draft-martini-pwe3-pw-switching-01.txt |