2012-05-08 Standards Action process or the Early IANA Allocation process 0 Reserved 1 OPEN 2 UPDATE 3 NOTIFICATION 4 KEEPALIVE 5 ROUTE-REFRESH 6-255 Unassigned Standards Action process or the Early IANA Allocation process 0 Reserved 1 ORIGIN 2 AS_PATH 3 NEXT_HOP 4 MULTI_EXIT_DISC 5 LOCAL_PREF 6 ATOMIC_AGGREGATE 7 AGGREGATOR 8 COMMUNITY 9 ORIGINATOR_ID 10 CLUSTER_LIST 11 DPA Chen, E., Bates, T., "Destination Preference Attribute for BGP", Work in progress, March 1996. 12 ADVERTISER (Historic) 13 RCID_PATH / CLUSTER_ID (Historic) 14 MP_REACH_NLRI 15 MP_UNREACH_NLRI 16 EXTENDED COMMUNITIES 17 AS4_PATH 18 AS4_AGGREGATOR 19 SAFI Specific Attribute (SSA) (deprecated) 20 Connector Attribute (deprecated) 21 AS_PATHLIMIT (deprecated) 22 PMSI_TUNNEL 23 Tunnel Encapsulation Attribute 24 Traffic Engineering 25 IPv6 Address Specific Extended Community 26 AIGP (TEMPORARY - expires 2013-04-25) 27 PE Distinguisher Labels 28-127 Unassigned 128 ATTR_SET 129-254 Unassigned 255 Reserved for development Standards Action process or the Early IANA Allocation process 0 Reserved 1 Message Header Error 2 OPEN Message Error 3 UPDATE Message Error 4 Hold Timer Expired 5 Finite State Machine Error 6 Cease 7-255 Unassigned Standards Action process or the Early IANA Allocation process Standards Action process or the Early IANA Allocation process 0 Reserved 1 Connection Not Synchronized 2 Bad Message Length 3 Bad Message Type 4-255 Unassigned Standards Action process or the Early IANA Allocation process 0 Reserved 1 Unsupported Version Number 2 Bad Peer AS 3 Bad BGP Identifier 4 Unsupported Optional Parameter 5 [Deprecated] 6 Unacceptable Hold Time 7 Unsupported Capability 8-255 Unassigned Standards Action process or the Early IANA Allocation process 0 Reserved 1 Malformed Attribute List 2 Unrecognized Well-known Attribute 3 Missing Well-known Attribute 4 Attribute Flags Error 5 Attribute Length Error 6 Invalid ORIGIN Attribute 7 [Deprecated] 8 Invalid NEXT_HOP Attribute 9 Optional Attribute Error 10 Invalid Network Field 11 Malformed AS_PATH 12-255 Unassigned Standards Action process or the Early IANA Allocation process 0 Unspecified Error 1 Receive Unexpected Message in OpenSent State 2 Receive Unexpected Message in OpenConfirm State 3 Receive Unexpected Message in Established State 4-255 Unassigned Standards Action or Early IANA Allocation process 0 Reserved 1 Maximum Number of Prefixes Reached 2 Administrative Shutdown 3 Peer De-configured 4 Administrative Reset 5 Connection Rejected 6 Other Configuration Change 7 Connection Collision Resolution 8 Out of Resources 9-255 Unassigned 0-63 Standards Action or the Early Allocation process [RFC4020] 64-127 First Come First Served 128-255 Vendor-Specific IANA does not assign 0 Reserved 1-63 Unassigned 64 Address Prefix ORF 65-127 Unassigned 128-255 Reserved for Vendor-Specific IETF Review 0 Reserved 1 Authentication (deprecated) 2 Capabilities 3-255 Unassigned First Come First Served 0 Reserved 1 L2TPv3 over IP 2 GRE 3 Transmit tunnel endpoint 4 IPsec in Tunnel-mode 5 IP in IP tunnel with IPsec Transport Mode 6 MPLS-in-IP tunnel with IPsec Transport Mode 7 IP in IP 8-65535 Unassigned Standards Action or Early Allocation 0 Reserved 1 Encapsulation 2 Protocol Type 3 IPsec Tunnel Authenticator 4 Color 5 Load-Balancing Block 6-255 Unassigned 0-127 Expert Review 128-251 First Come First Served 252-255 Experimental Use 0 Reserved 1 Frame Relay 2 ATM AAL5 SDU VCC transport 3 ATM transparent cell transport 4 Ethernet (VLAN) Tagged Mode 5 Ethernet Raw Mode 6 Cisco HDLC 7 PPP 8 SONET/SDH Circuit Emulation Service 9 ATM n-to-one VCC cell transport 10 ATM n-to-one VPC cell transport 11 IP Layer 2 Transport 12-14 Unassigned 15 Frame Relay Port mode 16 Unassigned 17 Structure-agnostic E1 over packet 18 Structure-agnostic T1 (DS1) over packet 19 VPLS 20 Structure-agnostic T3 (DS3) over packet 21 Nx64kbit/s Basic Service using Structure-aware 22-24 Unassigned 25 Frame Relay DLCI 25-39 Unassigned 40 Structure-agnostic E3 over packet 41 Octet-aligned payload for Structure-agnostic DS1 circuits 42 E1 Nx64kbit/s with CAS using Structure-aware 43 DS1 (ESF) Nx64kbit/s with CAS using Structure-aware 44 DS1 (SF) Nx64kbit/s with CAS using Structure-aware 45-127 Unassigned 128-251 Unassigned 252-255 Experimental Use 0-127 Expert Review 128-251 First Come First Served 252-255 Experimental Use 0 Reserved 1 Circuit Status Vector 2-127 Unassigned 128-251 Unassigned 252-255 Experimental Use Eric Rosen mailto:erosen&cisco.com 2010-02-23 Gargi Nalawade mailto:gargi&cisco.com 2004-02 James Uttaro mailto:uttaro&att.com 2010-02-23 Pradosh Mohapatra mailto:pmohapat&cisco.com 2010-02-23 Rex Fernando mailto:rex&juniper.net 2010-02-23