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MPLS RSVP-TE LSP load sharing not working

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Information

 
TitleMPLS RSVP-TE LSP load sharing not working
Symptoms
Even though multiple RSVP-TE LSPs are configured for load sharing, the traffic is not load shared across multiple LSPs. 
Only one LSP is used for traffic forwarding. 
 
X670V-48t.3 # show mpls statistics l2vpn

L2VPN Name
  Peer IP/LSP    Flags            RxPackets              RxBytes            TxPackets              TxBytes
----------------------------------------------------------------------------------------------------------
dug
  10.72.0.1          U                 2557               230130                  359                32310
    L58-S62-L72-lsp-1    +                                                              0                    0
    L58-S62-L72-lsp-2    +                                                              0                    0
    L58-S62-L72-lsp-3    +                                                              0                    0
    L58-S62-L72-lsp-4    +                                                            359                32310
    L58-S62-L72-lsp-5    +                                                              0                    0
    L58-S62-L72-lsp-6    +                                                              0                    0
    L58-S62-L72-lsp-7    +                                                              0                    0
    L58-S62-L72-lsp-8    +                                                              0                    0

 
Environment
  • EXOS 16.2.2.4 patch 1-3
  • EXOS 16.1.4.2-patch1-3
  • MPLS
  • RSVP-TE configuration
Cause
Due to a software bug, LSP sharing does not work correctly.
Resolution
This is fixed via CR xos0067463. This fix is included in the following versions of EXOS:
  • EXOS 22.3.1
  • EXOS 16.2.3
  • EXOS 16.1.5
  • EXOS 21.1.3.7-patch1-7
Additional notes
Also see the following article for other possible reasons of LSP sharing not working. 

Incorrect load sharing on MPLS P-node
 

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