-- OSPF Link State Database, External -- The Link State Database contains the Link State -- Advertisements from throughout the areas that the -- device is attached to. -- This table is identical to the OSPF LSDB Table in -- format, but contains only External Link State -- Advertisements. The purpose is to allow external -- LSAs to be displayed once for the router rather -- than once in each non-stub area. ospfExtLsdbTable OBJECT-TYPE SYNTAX SEQUENCE OF OspfExtLsdbEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "The OSPF Process's Links State Database." REFERENCE "OSPF Version 2, Section 12 Link State Adver- tisements" ::= { ospf 12 } ospfExtLsdbEntry OBJECT-TYPE SYNTAX OspfExtLsdbEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "A single Link State Advertisement." INDEX { ospfExtLsdbType, ospfExtLsdbLsid, ospfExtLsdbRouterId } ::= { ospfExtLsdbTable 1 } OspfExtLsdbEntry ::= SEQUENCE { ospfExtLsdbType INTEGER, ospfExtLsdbLsid IpAddress, ospfExtLsdbRouterId RouterID, ospfExtLsdbSequence Integer32, ospfExtLsdbAge Integer32, ospfExtLsdbChecksum Integer32, ospfExtLsdbAdvertisement OCTET STRING } ospfExtLsdbType OBJECT-TYPE SYNTAX INTEGER { asExternalLink (5) } MAX-ACCESS read-only STATUS current DESCRIPTION "The type of the link state advertisement. Each link state type has a separate advertise- ment format." REFERENCE "OSPF Version 2, Appendix A.4.1 The Link State Advertisement header" ::= { ospfExtLsdbEntry 1 } ospfExtLsdbLsid OBJECT-TYPE SYNTAX IpAddress MAX-ACCESS read-only STATUS current DESCRIPTION "The Link State ID is an LS Type Specific field containing either a Router ID or an IP Address; it identifies the piece of the routing domain that is being described by the advertisement." REFERENCE "OSPF Version 2, Section 12.1.4 Link State ID" ::= { ospfExtLsdbEntry 2 } ospfExtLsdbRouterId OBJECT-TYPE SYNTAX RouterID MAX-ACCESS read-only STATUS current DESCRIPTION "The 32 bit number that uniquely identifies the originating router in the Autonomous System." REFERENCE "OSPF Version 2, Appendix C.1 Global parameters" ::= { ospfExtLsdbEntry 3 } -- Note that the OSPF Sequence Number is a 32 bit signed -- integer. It starts with the value '80000001'h, -- or -'7FFFFFFF'h, and increments until '7FFFFFFF'h -- Thus, a typical sequence number will be very negative. ospfExtLsdbSequence OBJECT-TYPE SYNTAX Integer32 MAX-ACCESS read-only STATUS current DESCRIPTION "The sequence number field is a signed 32-bit integer. It is used to detect old and dupli- cate link state advertisements. The space of sequence numbers is linearly ordered. The larger the sequence number the more recent the advertisement." REFERENCE "OSPF Version 2, Section 12.1.6 LS sequence number" ::= { ospfExtLsdbEntry 4 } ospfExtLsdbAge OBJECT-TYPE SYNTAX Integer32 -- Should be 0..MaxAge MAX-ACCESS read-only STATUS current DESCRIPTION "This field is the age of the link state adver- tisement in seconds." REFERENCE "OSPF Version 2, Section 12.1.1 LS age" ::= { ospfExtLsdbEntry 5 } ospfExtLsdbChecksum OBJECT-TYPE SYNTAX Integer32 MAX-ACCESS read-only STATUS current DESCRIPTION "This field is the checksum of the complete contents of the advertisement, excepting the age field. The age field is excepted so that an advertisement's age can be incremented without updating the checksum. The checksum used is the same that is used for ISO connec- tionless datagrams; it is commonly referred to as the Fletcher checksum." REFERENCE "OSPF Version 2, Section 12.1.7 LS checksum" ::= { ospfExtLsdbEntry 6 } ospfExtLsdbAdvertisement OBJECT-TYPE SYNTAX OCTET STRING (SIZE(36)) MAX-ACCESS read-only STATUS current DESCRIPTION "The entire Link State Advertisement, including its header." REFERENCE "OSPF Version 2, Section 12 Link State Adver- tisements" ::= { ospfExtLsdbEntry 7 }