Configuring Switch Load Sharing; Load-Sharing Example; Verifying The Load-Sharing Configuration - Extreme Networks ExtremeWare 7.2e Installation And User Manual

Configuring Switch Load Sharing

To set up a switch to load share among ports, you must create a load-sharing group of ports. The first
port in the load-sharing group is configured to be the "master" logical port. This is the reference port
used in configuration commands. It can be thought of as the logical port representing the entire port
group.
All the ports in a load-sharing group must have the same exact configuration, including auto
negotiation, duplex setting, ESRP host attach or don't-count, and so on. All the ports in a load-sharing
group must also be of the same bandwidth class.
The following rules apply:
• One group can contain up to 8 ports.
• The ports in the group do not need to be contiguous.
• A load share group must use ports that are all of the same maximum bandwidth capability.
• When using load sharing with the ESRP host attach feature, configure all ports in the same
load-sharing group as host attach ports. When using load sharing with the ESRP don't count feature,
configure all ports in the same load-sharing group as don't count ports. For further information
about the ESRP host attach feature, see the ExtremeWare Software User Guide.
To define a load-sharing group, you assign a group of ports to a single, logical port number. To enable
or disable a load-sharing group, use the following commands:
enable sharing <port> grouping <portlist> {algorithm address-based }
disable sharing [<port>]
NOTE
Do not disable a port that is part of a load-sharing group. Disabling the port prevents it from forwarding
traffic, but still allows the link to initialize. As a result, a partner switch does not receive a valid indication
that the port is not in a forwarding state, and the partner switch will continue to forward packets.

Load-Sharing Example

The following example defines a load-sharing group that contains ports 9 through 12, and uses the first
port in the group as the master logical port 9:
enable sharing 9 grouping 9-12
In this example, logical port 9 represents physical ports 9 through 12.
When using load sharing, you should always reference the master logical port of the load-sharing group
(port 9 in the previous example) when configuring or viewing VLANs. VLANs configured to use other
ports in the load-sharing group will have those ports deleted from the VLAN when load sharing
becomes enabled.

Verifying the Load-Sharing Configuration

The screen output resulting from the
load sharing and the master logical port identity.
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ExtremeWare 7.2e Installation and User Guide
show ports sharing command lists the ports that are involved in
Load Sharing on the Switch
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