Huawei quidway s7700 Configuration Manual page 248

Quidway S7700 Smart Routing Switch
Configuration Guide - SPU
By default, the probe mode is fail-on-one. In fail-on-one mode, the S7700 considers a link to
be invalid when a probe detects that the link is in Down state.
If the probe mode is set to fail-on-all, the S7700 considers a link to be invalid only when all the
probes detect that the link is in Down state.
Step 5 Run:
forward-mode redirect
The packet forwarding mode is set to redirection.
In egress link load balancing, the packet forwarding mode must be set to redirection. In
redirection mode, the SPU forwards internal enterprise user traffic through the device egress
corresponding to the link gateway.
Step 6 (Optional) Run:
load-balance method { { hash address { destination | source | both } [ netmask ] }
| { hash url [ begin-pattern expression1 ] [ end-pattern expression2 ] } |
leastconns | roundrobin }
The load balancing algorithm is set.
By default, the SPU adopts the WRR algorithm.
Step 7 Run:
member member-name
A link is add to the link group and the link instance view is displayed.
Step 8 (Optional) Run:
member port port-number
The port number of a load balancing member instance is configured.
By default, the port number of a load balancing member instance is not configured.
When the load balancing member instance is in inservice or inservice standby state, you cannot
configure the port number.
Step 9 (Optional) Run:
rate-limit { bandwidth { inbound | outbound } band-limit [ threshold threshold-
value ] | connection conn-limit }
The bandwidth limit, bandwidth threshold for receiving new traffic, and connection rate limit
of the link instance are set.
When the values of the bandwidth limit, connection rate limit, or bandwidth threshold of a link
instance and a link are set simultaneously, both the values of the link instance and the link take
effect. For example, the bandwidth limit of a link is 200 kbit/s and link instance A and link
instance B are configured on the link. The bandwidth limit of link instance A is 200 kbit/s and
the bandwidth limit of link instance B is 100 kbit/s. When selecting a link, the S7700 needs to
consider the bandwidth limit of the link instance and link. That is, the total bandwidth of link
instance A and link instance B cannot exceed the bandwidth of the link.
By default, the connection rate of a link instance is not limited, the inbound/outbound bandwidth
limit is 1000000 kbit/s, and the inbound/outbound bandwidth threshold is 100%.
Issue 01 (2011-07-15)
NOTE
In egress link load balancing, only the WRR algorithm, the least connection algorithm, and the hash
algorithm based on the IP address are supported.
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