LDP Multipoint Opaque Value Element Types

Sandeep BishnoiPranjal Kumar Dutta

Alcatel-Lucent

IJsbrand WijnandsCisco Systems, Inc

LDP Multipoint Opaque Value Element Types- Presented at IETF 75- Multiple Generic Identifier :

“Type 0” is recommended for manual/static config“Type 1” [mLDP-draft] for dynamic“Type 2” static P2MP for MVPN [encoding based on RFC2685]

Issues with single mLDP FEC identifier• Migration

– Root node reserved FEC space MAY not match across vendors. Migration between vendors would require changing configuration on all leaf nodes.

• Security– Traffic leaking from VPN to public (static) tree

due to misconfiguration or during network convergence.

• Provisioning– Operator has to check availability of allocated ID.

No control over availability of ID till a tree not provisioned on root node.

PE

PE4

PE3

PE6

PE5

CE3- VPN1

CE4-VPN1

CE5-VPN1

BRANCH NODE

TRANSIT NODE

LEAF NODE

PE:P2MP_ID (1)

CE6-VPN1CE2-VPN2 CE3-VPN2

ROOT NODE (Vendor A)P2MP ID Range (1-1000)

ROOT NODE (Vendor B)P2MP ID Range (1001-2000)

LEAF NODE

PE:P2MP_ID (1)

BUD NODE

PE:P2MP_ID (1)LEAF NODE

PE:P2MP_ID (1)

Migration from Vendor A to Vendor B

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 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Type= 00 | Length |LSP Identifier | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | LSP Identifier (contd.) | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+AII Type = 0x00Length = length of value field in octets. The length is set to 4.LSP Identifier = A 4-octet field containing a value that is unique at a root node.

Type 0 – Manual/static P2MP mLDP LSP for Global instance

  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  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+  | Type= 2       | Length                        |       OUI     |  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+  |              OUI (contd.)       |           VPN Index         |  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+  |       VPN Index (contd.)        |        PMSI ID              |  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+  |       PMSI ID (contd.)          | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

AII Type = 0x02Length = length of value field in octets. The length is set to 11.OUI = Organization Unique Identifier. The length is set to 3 bytes.VPN Index = Identifying the VPN according to the OUI. The length is set to 4 bytes.PMSI ID = Mi-PMSI or S-PMSI identifier. The length is set to 4 bytes.

Type 2 – Manual/static P2MP mLDP LSP for MVPN