H3C Technologies H3C S12500 Series Switches - Manual (Page 134)

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Configuration restrictions and guidelines
When you configure load sharing for link aggregation groups, follow these restrictions and guidelines:
• The ingress-port criterion is mutually exclusive with any other criterion.
• Per-packet load sharing is not configurable when the system is operating in IRF mode. Because
per-packet load sharing might disorder the packets, H3C recommends not configuring per-packet
load sharing when the internal interface on the OAP card belongs to an aggregation group. For
more information about the OAP card, see OAA Configuration Guide.
• All the criteria except mpls-label1, mpls-label2, mpls-label3 and per-packet, if configured, apply
to equal-cost multi-path (ECMP) load sharing for unicast traffic. If per-packet load sharing is
configured, ECMP load sharing is performed according to the default load sharing criteria
supported by the switch. For more information about ECMP routing, see Layer 3—IP Routing
Configuration Guide.
Configuration procedure
To configure load sharing for link aggregation groups:
Step Command Remarks
1. Enter system view. system-view N/A
2. Configure the
load-sharing criteria
for link aggregation
groups.
link-aggregation load-sharing mode
{ { destination-ip | destination-mac |
destination-port | ingress-port |
mpls-label1 | mpls-label2 |
mpls-label3 | source-ip | source-mac
| source-port } * | per-packet }
Optional.
By default, the switch performs load
sharing based on all the criteria except
ingress port and per-packet.
The setting you make by using this
command affects all load-sharing link
aggregation groups.
Enabling link-aggregation traffic redirection
CAUTION:
•
To prevent traffic interruption, you must enable link-aggregation traffic redirection on switches at both
ends of the aggregate link.
• To prevent packet loss that might occur at a reboot, do not enable MSTP and link-aggregation traffic
redirection at the same time.
The link-aggregation traffic redirection function is available on switches or IRF member switches. It can
redirect traffic between cards or IRF member switches for a cross-card or cross-switch link aggregation
group. With this function, you can prevent traffic interruption when rebooting a card or IRF member
switch that contains link aggregation member ports. For more information about IRF, see IRF
Configuration Guide.
To enable link-aggregation traffic redirection: