H3C Technologies H3C S7500E Series Switches - Manual (Page 71)

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Configuring MPLS Statistics
Setting the Interval for Collecting LSP Statistics
To view MPLS statistics, you need to set the interval for collecting the LSP statistics.
Follow these steps to set the interval for collecting LSP statistics:
To do… Use the command… Remarks
Enter system view system-view —
Enter MPLS view mpls —
Set the interval for collecting
statistics
statistics interval interval-time
Required
0 seconds by default, meaning that
the system does not collect
statistics.
Inspecting LSPs
In MPLS, the MPLS control plane is responsible for establishing LSPs. However, when an LSP fails to
forward data, the control plane cannot detect the LSP failure or cannot do so in time. This brings
difficulty to network maintenance. To find LSP failures in time and locate the failed node, the device
provides the following mechanisms:
z
MPLS LSP ping
z
MPLS LSP tracert
MPLS LSP Ping
MPLS LSP ping is for checking the validity and availability of an LSP. At the ingress, it adds the label
for the FEC to be inspected into an MPLS echo request, which then is forwarded along the LSP to the
egress. The egress processes the request packet and returns an MPLS echo reply to the ingress. An
MPLS echo reply carrying a success notification indicates that the lSP is normal, and an MPLS echo
reply carrying an error code indicates that the LSP has failed.
Use the following command to check the validity and availability of an LSP:
To do… Use the command… Remarks
Use MPLS LSP ping to check the
validity and reachability of an
MPLS LSP
ping lsp [ -a source-ip | -c count |
-exp exp-value | -h ttl-value | -m
wait-time | -r reply-mode | -s
packet-size | -t time-out | -v ] *
ipv4 dest-addr mask-length
[ destination-ip-addr-header ]
Available in any view