Traceroute Implementation - Alcatel-Lucent 7750 SR OS Service Manual

OAM and SAA

Traceroute Implementation

Various applications, such as lsp-trace, traceroute and vprn-trace, pass through the P-chip on the
way to the control CPU. At this point, and when it egresses the control CPU, the P-chip should
insert a timestamp inside the packet. Only packets processed by the Control CPU are processed.
When interpreting these timestamps care must be taken that some nodes are not capable of
providing timestamps, as such timestamps must be associated with the same IP-address that is
being returned to the originator to indicate what hop is being measured.
7750 SR OS Services Guide Page 1383