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Stack Ports Uneven Traffi...

Stack Ports Uneven Traffic

Created: May 18, 2021 03:41:54Latest reply: Jan 31, 2022 14:32:53 298 2 0 0 0
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Good day Community,

Can we ask for your help regarding the uneven traffic on the stacked ports of the device S6720-30C-EI-24S-DC?


<S6720>display stack port

*down : administratively down

(r)   : Runts trigger error down

(c)   : CRC trigger error down

(l)   : Link-flapping trigger error down

Logic Port         Phy Port                     Online       Status 

----------------------------------------------------------------------------

stack-port0/1      XGigabitEthernet0/0/21       present      up     

                   XGigabitEthernet0/0/22       present      up     

                   XGigabitEthernet0/0/23       present      up     

                   XGigabitEthernet0/0/24       present      up     

stack-port1/2      XGigabitEthernet1/0/21       present      up     

                   XGigabitEthernet1/0/22       present      up     

                   XGigabitEthernet1/0/23       present      up     

                   XGigabitEthernet1/0/24       present      up     


<S6720>display interface brief

PHY: Physical

*down: administratively down

#down: LBDT down

(l): loopback

(s): spoofing

(E): E-Trunk down

(b): BFD down

(e): ETHOAM down

(dl): DLDP down

(lb): LBDT block

InUti/OutUti: input utility/output utility

Interface                   PHY   Protocol  InUti OutUti   inErrors  outErrors

XGigabitEthernet0/0/21      up    up        1.69%  1.43%          0          0

XGigabitEthernet0/0/22      up    up       91.57%   100%          0          0

XGigabitEthernet0/0/23      up    up       43.21% 21.23%          0          0

XGigabitEthernet0/0/24      up    up        1.40%  0.57%          0          0

XGigabitEthernet1/0/21      up    up        1.43%  1.69%          0          0

XGigabitEthernet1/0/22      up    up         100% 91.58%          0          0

XGigabitEthernet1/0/23      up    up       21.23% 43.21%          0          0

XGigabitEthernet1/0/24      up    up        0.57%  1.40%          0          0


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Popeye_Wang
Admin Created May 18, 2021 03:51:39

Hi Cart,

By default, the physical member ports of a stack port perform load balancing in enhanced mode. So the possible cause is that traffic features are unique and hash load balancing cannot be performed.

You can try to use the stack-port load-balance mode command to adjust the load balancing mode and observe the result.

stack

Example

# Set the global load balancing mode to src-ip.

<HUAWEI> system-view

[HUAWEI] stack-port load-balance mode src-ip

# Set the load balancing mode on stack port 0/1 to dst-ip.

<HUAWEI> system-view

[HUAWEI] interface stack-port 0/1

[HUAWEI-stack-port0/1] stack-port load-balance mode dst-ip


If all parameters have been tried and load balancing still fails,  the traffic statistics are unique and no hash load sharing is possible. For example, a large amount of traffic of the same type is transmitted. In this case, it is recommended to replace the 40GE ports as the stack ports.

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2#
Popeye_Wang
Popeye_Wang Admin Created May 18, 2021 03:51:39

Hi Cart,

By default, the physical member ports of a stack port perform load balancing in enhanced mode. So the possible cause is that traffic features are unique and hash load balancing cannot be performed.

You can try to use the stack-port load-balance mode command to adjust the load balancing mode and observe the result.

stack

Example

# Set the global load balancing mode to src-ip.

<HUAWEI> system-view

[HUAWEI] stack-port load-balance mode src-ip

# Set the load balancing mode on stack port 0/1 to dst-ip.

<HUAWEI> system-view

[HUAWEI] interface stack-port 0/1

[HUAWEI-stack-port0/1] stack-port load-balance mode dst-ip


If all parameters have been tried and load balancing still fails,  the traffic statistics are unique and no hash load sharing is possible. For example, a large amount of traffic of the same type is transmitted. In this case, it is recommended to replace the 40GE ports as the stack ports.

View more
  • x
  • convention：
(0) (0)
3#
Unicef
Unicef MVE Created Jan 31, 2022 14:32:53

Good answer
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  • convention：
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