maximum load-balancing (OSPFv3)
Function
The maximum load-balancing command sets the maximum number of equal-cost routes for carrying out load balancing.
The undo maximum load-balancing command restores the default setting.
The default maximum number of equal-cost OSPFv3 routes for carrying out load balancing is 8.
Product |
Support |
|---|---|
S5720-EI, S5720-HI, S5720I-SI, S5720S-SI, S5720-SI, S5735-S, S5735S-S, S5735-S-I, S5730-HI, S5730S-EI, S5730-SI, S5731-H, S5731-S, S5731S-H, S5731S-S, S5732-H, S6720-EI, S6720-HI, S6720S-EI, S6720S-SI, S6720-SI, S6730-H, S6730S-H, S6730-S, and S6730S-S |
Supported |
S2720-EI, S5720-LI, S5735-L, S5735S-L, S5735S-L-M, S5720S-LI, S6720-LI, and S6720S-LI |
Not supported |
Parameters
| Parameter | Description | Value |
|---|---|---|
number |
Specifies the maximum number of equal-cost routes. |
The value is an integer ranging from 1 to 8. |
Usage Guidelines
Applicable Environment
If a routing protocol discovers multiple routes with the same cost to a single destination, they can carry out load balancing. The maximum load-balancing command sets the maximum number of equal-cost routes that can carry out load balancing. This optimizes the routing policy and ensures traffic forwarding on a complex network.
Effect
Packets will be load-balanced by multiple equal-cost routes to a single destination.
Load balancing is performed in either per-flow or per-packet mode. By default, packets are load-balanced in per-flow mode.
Follow-up Procedure
If more existing equal-cost OSPFv3 routes than the value set using the maximum load-balancing command are available, valid routes are selected for load balancing based on the following criteria:
- Route preference: Routes with lower preferences are selected for load balancing.
- Interface index: If routes have the same priorities, routes with higher interface index values are selected for load balancing.
- Next hop IP address: If routes have the same priorities and interface index values, routes with larger IP address are selected for load balancing.
The nexthop command allows routes with a specified weight to carry out load balancing.
Precautions
To disable load balancing, set the value of number to 1.
Example
# Set the maximum number of equal-cost routes that OSPFv3 can support to 3.
<HUAWEI> system-view
[HUAWEI] ospfv3 1
[HUAWEI-ospfv3-1] maximum load-balancing 3
# Restore the default maximum number of equal-cost routes for carrying out load balancing.
<HUAWEI> system-view
[HUAWEI] ospfv3 1
[HUAWEI-ospfv3-1] undo maximum load-balancing