Brocade Multi-Service IronWare Multiprotocol Label Switch (MPLS) Configuration Guide (Supporting R05.6.00) - Manual (Page 358)

334 Multi-Service IronWare Multiprotocol Label Switch (MPLS) Configuration Guide
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Commands
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9. Ingress tunnel accounting is supported for LDP ECMP tunnels. Statistics for LDP ECMP tunnel
aggregate traffic from all the individual paths.
10. LDP ECMP LER tunnels cannot use GRE or RSVP tunnel interfaces.
Interactions with other features
LDP ECMP tunnel accounting
The show mpls statistics ldp tunnel command is used to retrieve statistics for particular LDP
tunnel. MPLS module on MP collects packet counts for all the paths in the ECMP from all line cards
and adds them together before displaying the result to the user.
There is an existing configurable option exclude-ethernet-overhead available for tunnel ingress
accounting which is used to exclude the Ethernet overhead bytes from the total byte statistics
retrieved for an LDP tunnel. With ECMP paths for LDP tunnel, some paths can be over tagged
interfaces and some can be over untagged interface.To keep consistency in the counting of
overhead bytes, it is mandatory for the tunnel statistics be cleared after changing
exclude-ethernet-overhead mode for ingress tunnel accounting. To enforce this, a confirmation
message is added to the command to change the exclude-ethernet-overhead and the command
now clears the counters automatically.
Sflow support for MPLS LER
Sflow sample for traffic sent over LDP tunnel includes the tunnel ID and not the tunnel’s out
segment information. Adding the support for LDP ECMP tunnel does not have any impact on Sflow
sample.
Commands
The following commands support the feature described in this chapter:
• ping mpls ldp
• show mpls forwarding [p2p]
• show mpls ldp tunnel
• show mpls route
• system-max ecmp-pram-block-size dec
• traceroute mpls ldp