1. Praveen Muley (Alcatel), Susan Hares (NextHop), Keyur Patel (Cisco), Luyuan Fang (AT&T), Benson Schliesser (Savvis), Nabil Bitar (Verizon) Group Cooperative Route Filtering Capability for BGP-4 draft-muley-hares-idr-orf-order-01.txt

2. Summary Policies are being written with multiple ORF types that you want to group, but no grouping exists –Want something like a “route-map” function –This draft adds missing functionality of relation between the ORF entries Draft was first presented in San Diego IETF60 –Feedback was to incorporate the deployment scenarios. –New Co-authors have joined.

3. Problem Today ORFs expression does logical “AND” among the ORF types and logical “OR” among the ORF entries. That may not provide adequate ORF filter expression of policy for processing. Policies are being written with multiple ORF types –Want to Group and use OR/AND operators across ORF entries –Want something like a “route-map” function Current operational procedures for filtering provides AFI/SAFI context only. –Grouping will give further context granularity in the same AFI/SAFI.

4. Solution Create Groups of policies that are applied in a specific order –Apply Group policies numerical order (1, 2, 3) Apply Group polices before Non-Group polices –Use defaults in standards or –Specify defaults (via a new Default ORFs)

5. Current ORF format AFI (2 octets) Reserved (1 octet)SAFI (1 octet) When to refresh (1 octet)ORF type (1 octet) Length of ORFs (2 octets) First ORF entry (variable) Second ORF entry (variable)

6. GROUP ORF ID format Group id (1 octet) Length of ORFs (2 octets) First ORF entry (variable) Second ORF entry (variable) Length of ORFs (2 octets) First ORF entry (variable) Second ORF entry (variable) ORF type (1 octet) N- ORF entry (variable) ORF type (1 octet) Common ORF Flag (OR)

7. ORF Entry within Group ID Action (2 bit) Match (1 bit) AND/OR (1 bit) Reserved (4 bits) Type specific part (variable) AND/OR bit (0=OR, 1 = AND) Semantics of the bits in Group ORF impact next ORF entries (last ignored) ORF-entry-1(AND), ORF-Entry-2 (OR), ORF-Entry-3(AND) ORF-Entry-4 (I) = (ORF-Entry-1 AND ORF-Entry2) OR (ORF-Entry-3 and ORF-Entry-4)

8. Process Group identified by Group id –Groups a set of ORFs –ORF procedure same within ORF with exception of the AND/OR bit operation Apply ORFs in order of Group ID Non-Grouped ORFs applied later

9. Uses of Group ORF Layer 3 VPN policies Policies for Global routing that include all ORFS

10. Two VPN AFI/SAFI = IPVPN Group 1 (implicitly Red VPN) Extended ORF Type = Target Extended Community Permit Red (AND) ORF Type = Community Permit City1 PE 1 CE-B2 CE-B3 PE 3 PE 2 PE 4 Customer Site 3 City 3 CE -A1 CE-B1 CE-A5 CE-A4 CE-A5 Customer Site 1, City 1 Customer Site 5 City 5 Customer Site 4 (VRF) City 4 (COM) Customer Site 3 City 3 VRF Blue VRF Blue VRF Blue VRF Red VRF Red VRF- Red Customer Site 5 City 5 Customer Site 1, City1 VRF Blue RR PE 1 CE-B2 Customer Site 2, City 2 CE –A2 Customer Site2, City2 (OR) Group 2 (implicitly Blue VPN) Extended ORF Type = Target Extended Community Permit BLUE (AND)ORF Type = Community Permit City2

11. Prefix and ASPATH AFI/SAFI = IPV4 Group 1 [permit action] ORF Type = Prefix match X, permit match Y, permit match Z, permit (AND) ORF Type = ASPATH match ASPATH 3,1.*, permit (OR) Group 2 [Deny Action] ORF Type = Prefix Match prefix( */25) or longer (OR) Group 3 [Permit Action] ORF Type = Prefix Match prefix(*) AS 1 AS 2 AS 3 Net X, Y, Z AS 4