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How to solve the 5700 Eth-trunk load imbalance problem?

Created: Jul 30, 2019 14:01:58Latest reply: Jul 30, 2019 17:19:05 294 2 0 0
  Rewarded HiCoins: 0 (problem resolved)

Hello everyone,

Today I will share with you how to solve the 5700 Eth-trunk load imbalance problem.

Please give me some advice, thank you!

  Interface                   PHY   Protocol  InUti OutUti   inErrors  outErrors

   Eth-Trunk1                  up    up       34.90%  2.24%          0          0

  GigabitEthernet0/0/2      up    up           0%  4.48%          0          0

  GigabitEthernet0/0/3      up    up       69.79%     0%          0          0

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

Eth-Trunk1 current state : UP

Line protocol current state : UP

Description:

Switch Port, Link-type : dot1q-tunnel,

PVID : 2589, Hash arithmetic : According to SIP-XOR-DIP,Maximal BW: 2G, Current

BW: 2G, The Maximum Frame Length is 9216

IP Sending Frames' Format is PKTFMT_ETHNT_2, Hardware address is XXXX-XXXX-XXXX

Current system time: 2019-07-30 00:22

Last 300 seconds input rate 705421760 bits/sec, 66507 packets/sec

Last 300 seconds output rate 44658888 bits/sec, 39913 packets/sec

Input:  1785870449 packets, 2327140418599 bytes

  Unicast:                 1785159971,  Multicast:                      616240

  Broadcast:                    94238,  Jumbo:                               0

  Discard:                          0,  Pause:                               0

  Frames:                           0

 

  Total Error:                      0

  CRC:                              0,  Giants:                              0

  Runts:                            0,  DropEvents:                          0

  Alignments:                       0,  Symbols:                             0

  Ignoreds:                         0

 

Output:  1071758830 packets, 169397348647 bytes

  Unicast:                 1071720496,  Multicast:                       38323

  Broadcast:                       11,  Jumbo:                               0

  Discard:                          0,  Pause:                               0

 

  Total Error:                      0

  Collisions:                       0,  Late Collisions:                     0

  Deferreds:                        0

 

    Input bandwidth utilization  : 35.27%

    Output bandwidth utilization : 2.23%

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

PortName                      Status      Weight

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

GigabitEthernet0/0/2         UP          1

GigabitEthernet0/0/3         UP          1

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

The Number of Ports in Trunk : 2

The Number of UP Ports in Trunk : 2

That is all I want to share with you!


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Popeye_Wang
Admin Created Jul 30, 2019 14:03:11 Helpful(0) Helpful(0)

Hi Hobbit,
1. Check whether the interface bandwidths at both ends match.
2. Check whether the eth-trunk modes at both ends match. It is recommended that the aggregation mode be dynamic lacp.
3. As shown in the information you post, the Eth-Trunk interface uses the hash algorithm based on the source IP address or the destination IP address by default. In the IP network, the algorithm ensures even load balancing because the IP address changes randomly. However, on a Layer 2 network, a large number of MAC addresses change and IP addresses are fixed. As a result, load balancing is uneven.
If the two sides of the algorithm is not consistent will also lead to uneven load.
You can run the load-balance command to modify the hash algorithm. please refer to
https://support.huawei.com/hedex/hdx.do?docid=EDOC1100064949&id=load-balance&text=%252525253Cb%252525253Eload%252525253C%252525252Fb%252525253E-%252525253Cb%252525253Ebalance%252525253C%252525252Fb%252525253E&lang=en
4. For broadcast and multicast, you can run the unknown-unicast load-balance {dmac | smac | smacxordmac | enhanced} command in the system view to configure the load balancing mode.
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Popeye_Wang
Popeye_Wang Admin Created Jul 30, 2019 14:03:11 Helpful(0) Helpful(0)

Hi Hobbit,
1. Check whether the interface bandwidths at both ends match.
2. Check whether the eth-trunk modes at both ends match. It is recommended that the aggregation mode be dynamic lacp.
3. As shown in the information you post, the Eth-Trunk interface uses the hash algorithm based on the source IP address or the destination IP address by default. In the IP network, the algorithm ensures even load balancing because the IP address changes randomly. However, on a Layer 2 network, a large number of MAC addresses change and IP addresses are fixed. As a result, load balancing is uneven.
If the two sides of the algorithm is not consistent will also lead to uneven load.
You can run the load-balance command to modify the hash algorithm. please refer to
https://support.huawei.com/hedex/hdx.do?docid=EDOC1100064949&id=load-balance&text=%252525253Cb%252525253Eload%252525253C%252525252Fb%252525253E-%252525253Cb%252525253Ebalance%252525253C%252525252Fb%252525253E&lang=en
4. For broadcast and multicast, you can run the unknown-unicast load-balance {dmac | smac | smacxordmac | enhanced} command in the system view to configure the load balancing mode.
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AGregory
AGregory Created Jul 30, 2019 17:19:05 Helpful(0) Helpful(0)

Are you passing mpls traffic on this port?
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