Extreme Networks 200 Series - Manual (Page 94)

92 Summit 200 Series Switch Installation and User Guide
Configuring Ports on a Switch
ports as a single logical port. For example, VLANs see the load-sharing group as a single logical port.
Most load-sharing algorithms guarantee packet sequencing between clients.
If a port in a load-sharing group fails, traffic is redistributed to the remaining ports in the load-sharing
group. If the failed port becomes active again, traffic is redistributed to include that port.
NOTE
Load sharing must be enabled on both ends of the link or a network loop may result. The load-sharing
algorithms do not need to be the same on both ends.
Load sharing on stacked switch configurations require that members of a load sharing group must
reside on the same slot. Load sharing is not supported through the stacking port.
This feature is supported between Extreme Networks switches only, but may be compatible with
third-party trunking or link-aggregation algorithms. Check with an Extreme Networks technical
representative for more information.
Load-Sharing Algorithms
Load-sharing algorithms allow you to select the distribution technique used by the load-sharing group
to determine the output port selection. Algorithm selection is not intended for use in predictive traffic
engineering.
You can configure the address-based load-sharing algorithm on the Summit 200 series switch.
The address-based load-sharing algorithm uses addressing information to determine which physical
port in the load-sharing group to use for forwarding traffic out of the switch. Addressing information is
based on the packet protocol, as follows:
— IP packets—Use the source and destination MAC and IP addresses.
— All other packets—Use the source and destination MAC address.
Configured IP Address-Based Load Sharing
When you configure load sharing, the switch examines a specific place in the packet to determine which
egress port to use for forwarding traffic:
• For Layer 2 load sharing, the switch uses the MAC source address, MAC destination address, IP
source address, and IP destination address.
• For Layer 3 load sharing, the switch uses the IP destination address.
You can control the field examined by the switch for IP address-based load sharing, using the following
command:
config sharing address-based [mac_source | mac_destination | mac_source_destination |
ip_source | ip_destination | ip_source_destination]
where: