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Cisco Bug: CSCvu48953 - IPV4 Traffic Not Load-balanced on Bundle-Ether Ports

Last Modified

Jun 19, 2020

Products (1)

  • Cisco ASR 9000 Series Aggregation Services Routers

Known Affected Releases

7.1.1.FWDG

Description (partial)

Symptom:
Observing the ipv4 unicast traffic is not balanced on ASR9922 Lightspeed+ Bundle interface (BE48 )configured with 16 member  links .

ASR9922 running version XR 7.1.15

BE48 with  16 Links ( IPV4 Traffic)::

Protocol:General

Interface             In(bps)      Out(bps)     InBytes/Delta  OutBytes/Delta

Hu0/0/0/7             98000/  0%     6.5G/  6%     1.7M/24624     70.0G/1.7G  
Hu0/0/0/9            486000/  0%     2.2G/  2%     8.5M/120864    24.1G/593.1M
Hu0/0/0/11           100000/  0%     2.5G/  2%     1.7M/24864     27.4G/673.6M
Hu0/0/0/24            99000/  0%     6.7G/  6%     1.7M/24930     72.2G/1.7G  
Hu0/0/0/25            99000/  0%     2.2G/  2%     1.7M/24930     24.6G/612.3M
Hu0/0/0/26            98000/  0%     6.7G/  6%     1.7M/24930     72.1G/1.7G  
Hu0/0/0/27            98000/  0%     2.0G/  2%     1.7M/24930     21.9G/547.0M
Hu0/8/0/3            495000/  0%     2.1G/  2%     8.6M/121118    23.0G/567.2M
Hu0/8/0/4             99000/  0%     6.7G/  6%     1.7M/24864     72.4G/1.7G  
Hu0/15/0/12          486000/  0%     2.3G/  2%     8.5M/120988    25.3G/622.2M
Hu0/15/0/13          100000/  0%     6.6G/  6%     1.7M/25244     71.6G/1.7G  
Hu0/15/0/14          100000/  0%     2.2G/  2%     1.7M/24922     24.0G/591.5M
Hu0/15/0/22           98000/  0%     6.6G/  6%     1.7M/24988     71.5G/1.7G  
Hu0/15/0/23           98000/  0%     6.7G/  6%     1.7M/24988     71.8G/1.7G  
Hu0/15/0/28           98000/  0%     2.3G/  2%     1.7M/24988     25.4G/633.6M
Hu0/15/0/30           98000/  0%     6.8G/  6%     1.7M/24864     73.7G/1.8G

Conditions:
Issue is observed if Bundle interface is configured   with even member links (10, 12, 14, 16 members).
This issue is not seen with bundles with odd member links (9, 11, 13, 15 members)
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