3Com Switch 8800 Configuration Guide Chapter 36 MPLS Basic Capability Configuration36-8III. Setting the maximum hop count in path vector modeWhen path vector mode is adopted for loop detection, it is also necessary to specify themaximum value of LSP path. In this way, when one of the following conditions is met, itis considered that a loop happens and the LSP establishment fails.z The record of this LSR already exists in the path vector recording table.z The path hop count exceeds this maximum value.Perform the following configuration in the system view.Table 36-14 Set the maximum hop count in path vector modeOperation CommandSet the maximum hop count in pathvector mode mpls ldp path-vectors pv-numberReturn to the default maximum hopcount in path vector mode undo mpls ldp path-vectorsThe maximum hop count defaults to 32.36.3.6 Configuring LDP Authentication Mode Between Every Two RoutersPerform the following configuration in VLAN interface view or remote-peer view.Table 36-15 Configure LDP authentication modeOperation CommandConfigure LDP authentication Mode mpls ldp password [ cipher | simple ]passwordRemove LDP authentication undo mpls ldp password36.4 Displaying and Debugging MPLS36.4.1 Displaying and Debugging MPLSMPLS provides abundant display and debugging commands for monitoring LDPsession state, tunnel, all the LSPs and their states, and so on. These commands arethe powerful debugging and diagnosing tools.I. Displaying static LSPsAfter accomplishing the configuration tasks mentioned previously, you can execute thedisplay command in any view to view the running state of a single or all the static LSPsand thus to evaluate the effect of the configurations.
