Nortel Networks 700106, 700116, 700117, 700107 manual Automatic Selection of Redundant Connections

Alteon Web Switch Hardware Installation Guide

Automatic Selection of Redundant Connections

NOTE – This feature is supported only on the Alteon 180 Series Web switches.

The Alteon 180 series’ unique dual-media configuration supports automatic bring-up and fail- over between the 10/100 Mbps and 1000 Mbps port-pairs. Order of precedence follows these rules:

νIf both the 10/100 Mbps and 1000 Mbps ports are inactive:

If the user activates the Gigabit Ethernet port first (by plugging a live cable into the

oSC-jack), the port immediately becomes active.

If the user activates the 10/100 Mbps port first, it remains inactive for a user-selectable timeout (default 1.5 seconds). If the Gigabit Ethernet port is activated prior to the time- out, it becomes the active port. Otherwise, the 10/100 Mbps port becomes active.

νIf the active Gigabit Ethernet link fails, the 10/100 Mbps port will become the active port, with minimally required software intervention.

νIf the 10/100 Mbps link is active and the Gigabit Ethernet link becomes viable (either because of a newly created connection or because of a repaired link), the 10/100 Mbps link will remain active until one of the following conditions occurs:

oThe 10/100 Mbps link fails or is removed by the user.

The user forces the Gigabit Ethernet to become the active link from any management interface.

22 nChapter 2: Installing the Switch Hardware

212779-A, December 2001