Alteon Application Switch Operating System Application Guide
Port Trunking
Document ID: RDWR-ALOS-V2900_AG1302 91
Built-In Fault Tolerance
Since each trunk group comprises multiple physical links, the trunk group is inherently fault tolerant.
As long as one connection between the Alteons is available, the trunk remains active.
Statistical load balancing is maintained whenever a port in a trunk group is lost or returned to
service.
Example Static Port Trunking
In the following example, three ports are trunked between two Alteons:
Figure 6: Static Port Trunking Example
Prior to configuring each Alteon, you must connect to the appropriate CLI as the administrator.
Note: For details about accessing and using any of the menu commands described in this example,
see the Alteon Application Switch Operating System Command Reference.
In this example, two Alteons are used. If a third-party device supporting link aggregation is used
(such as Cisco routers and switches with EtherChannel technology or Sun's Quad Fast Ethernet
Adapter), trunk groups on the third-party device should be configured manually. Connection
problems could arise when using automatic trunk group negotiation on the third-party device.
Caution: To prevent spanning tree instability, do not change the spanning tree parameters on
individual ports belonging to any trunk group.
1. Connect the ports that are involved in the trunk group.
2. On Alteon 1, define a trunk group.
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