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LDP IP and PW Capability draft-raza-mpls-ldp-ip-pw-capability-00.txt Kamran Raza Sami Boutros

LDP IP and PW Capability draft-raza-mpls-ldp-ip-pw-capability-00.txt Kamran Raza Sami Boutros. Background. No LDP capability is exchanged for IP label switching and L2VPN/PW signaling.

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LDP IP and PW Capability draft-raza-mpls-ldp-ip-pw-capability-00.txt Kamran Raza Sami Boutros

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  1. LDP IP and PW Capabilitydraft-raza-mpls-ldp-ip-pw-capability-00.txtKamran RazaSami Boutros

  2. Background • No LDP capability is exchanged for IP label switching and L2VPN/PW signaling. • When operating in Downstream Unsolicited mode, an LDP speaker may unnecessarily advertise its local state for IP/PW to another speaker who doesn’t need it. • This document proposes a solution by which an LDP speaker announces it "incapability" or disability or non-support for IP label switching or L2VPN/PW application. • Two new capabilities are being introduced using mechanisms in LDP Capabilities [RFC5561]

  3. IP Label Switching Capability TLV 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |1 |0 | IP Label Sw. Cap (IANA) | Length (2) | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |1| Reserved | AF Bitmap | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ U bit set to 1 silently ignore S Bit set to 1 7 6 5 4 3 2 1 0 +-+-+-+-+-+-+-+-+ | AF bitmap | +-+-+-+-+-+-+-+-+ Where: bit0: IPv4 label switching application bit1: IPv6 label switching application bit2-7: Reserved.

  4. PW Signaling Capability TLV 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |1 |0 | PW Sig. Cap (IANA) | Length (2) | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |1| Reserved |E| Reserved | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ U bit set to 1 silently ignore S Bit set to 1 E-bit Enable PW application respectively.

  5. Operation-1 Disabling IP/PW label applications on an ICCP session • LSR-1 and LSR-2 support "Dynamic Announcement" capability [RFC5561]. • LSR-1 includes both the "IP Label Switching" capability TLV (with bit0-1 of "Address Family Bitmap" set to 0) and "PW Signaling” capability TLV (with E-bit set to 0) in the Initialization message. • Upon receipt of those TLVs in Initialization message, LSR2 will disable any IP/PW address/label binding state advertisement towards LSR1.

  6. Operation-2 Disabling IP application on an established IP/PW session • LSR1 will first withdraw all its IP label state, and Address Withdraw message to withdraw its addresses. • LSR1 will then send IP Label Switching capability TLV in Capability message towards LSR2 with bit0-1 (IPv4, IPv6) in "Address Family Bitmap" set to zero. • LSR2 will disable IP application towards LSR1 and withdraw all previous IP application label/address state • Both LSRs should continue to exchange PW Signaling application related state.

  7. Thank You

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