mpls-echo-request-downstream-map {dsmap | ddmap}
config>test-oam
This command specifies the downstream mapping TLV format to use in all LSP trace packets and LDP treetrace packets originated on the node. The configured global value becomes the default downstream mapping TLV for all newly created LSP trace and LDP treetrace tests. It has no effect on existing tests and can be overridden on a specific test by setting the downstream-map-tlv parameter in the lsp-trace or ldp-treetrace commands.
The downstream mapping TLV allows the sender and responder nodes to exchange and validate interface and label stack information for each downstream hop in an LDP FEC path, an RSVP LSP, a BGP-labeled IPv4 route, an SR-ISIS node SID, or an SR-OSPF node SID. If the responder node has multiple equal-cost next hops for the LDP FEC, BGP-labeled IPv4 prefix, SR-ISIS node SID, or SR-OSPF node SID, it replies in the downstream mapping TLV with the downstream information of each outgoing interface that is part of the ECMP next hop set for the prefix. The downstream mapping TLV can be further used to exercise a specific path of the ECMP set using the path-destination option in the lsp-ping or lsp-trace commands.
By default, the system uses the DSMAP TLV.
dsmap
configures all LSP tree and LDP treetrace packets to use the original target FEC stack TLV for BGP-labeled IPv4/32 prefixes as defined in RFC 4379
configures all LSP tree and LDP treetrace packets to use the enhanced TLV format specified in RFC 6424