Extreme Networks ExtremeWare XOS Command Reference Manual page 361

ExtremeWare XOS 11.5 supports only the Summit X450 family of switches and the BlackDiamond 8800 series switch.
NOTE
Always verify the LACP configuration by issuing the
being in the aggregator.
If a port in a LAG fails, traffic is redistributed to the remaining ports in the LAG. If the failed port
becomes active again, traffic is redistributed to include that port.
Link aggregation must be enabled on both ends of the link, or a network loop will result.
NOTE
See ExtremeWare XOS Concepts Guide for information on the interaction of port-based ACLs and LAGs of ports.
Modular switch LAGs are defined according to the following rules:
Although you can reference only the logical port of a LAG to a Spanning Tree Domain (STPD), all the
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ports of a load-sharing group actually belong to the specified STPD.
When using link aggregation, you should always reference the logical port of the LAG when
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configuring or viewing VLANs. VLANs configured to use other ports in the LAG will have those
ports deleted from the VLAN when link aggregation becomes enabled.
Link aggregation, or load-sharing, algorithms allow you to select the distribution technique used by the
LAG to determine the output port selection. Algorithm selection is not intended for use in predictive
traffic engineering.
Port-based—Uses the ingress port to determine which physical port in the LAG is used to forward
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traffic out of the switch.
Address-based—Uses addressing information to determine which physical port in the LAG to use
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for forwarding traffic out of the switch. Refer to
information on using addressing information.
Summit X450a and X450e series switches only. The following guidelines apply to link aggregation on the
the Summit X450a and X4503 series switches:
One static LAG can contain up to 8 ports.
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An LACP (dynamic) LAG can include a maximum of 16 ports; out of these up to 8 can be selected
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links and the remaining 8 will be standby links.
The maximum number of LAGs is 32.
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The default load-sharing algorithm is L2 address-based aggregation. Any broadcast, multicast, or
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unknown unicast packet is distributed across all members in the LAG.
The available address-based parameters on the Summit X450a and X450e series switches are L2 for
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Layer 2 and L3_L4 for Layer 3 plus Layer 4. If the packet is not IP, the switch applies the Layer 2
algorithm, which is the default setting.
NOTE
You cannot configure port-based load sharing algorithm on the Summit X450 family of switches; you configure only
address-based load-sharing algorithms.
ExtremeWare XOS 11.5 Command Reference Guide
command; look for the ports listed as
show ports sharing
configure sharing address-based
enable sharing grouping
for more
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