Spanning Tree Protocol Topology Change Detection; Static Link Aggregation; Table 4 Spanning Tree Protocol Topology Change Detection Configuration Rules - Nortel 8300 User Manual

Spanning Tree Protocol topology change detection

Change detection enables the detection of topology changes and sends a
topology change notification (TCN) to the Root, on an individual port basis.
Change detection is enabled by default. When change detection is enabled
and a topology change occurs, a trap is sent containing the following
information so that you can identify the device:
•
•
•
You can disable change detection on ports where a single end station is
connected, and where powering that end station on and off triggers the
TCN. Change detection is referenced in IEEE STD 802.1D.
Topology change detection configuration rules
The following rules apply to the Spanning Tree topology change detection
setting.
Table 4
Spanning Tree Protocol topology change detection configuration rules
•
You can configure change detection on access ports only. This also applies to link aggregation
ports.
•
If you disable change detection and then change the port from access to tagging-enabled,
the switch automatically sets change-detection to enabled for the port. This also applies to
link aggregation ports.
•
In a link aggregation group with access ports, modifications to change detection for a member
port are automatically applied to the remaining member ports.

Static link aggregation

Link aggregation is a point-to-point connection that aggregates multiple
ports so that they logically act like a single port with the aggregated
bandwidth. Grouping multiple ports into a logical link provides higher
aggregate throughput on a switch-to-switch or switch-to-server application.
Link aggregation provides media and module redundancy.
The ERS 8300 supports link aggregation in a static configuration mode
where no LACP is used. The ERS 8300 link aggregation is interoperable
with Baystack and Ethernet Routing Switch 8600 link aggregation, also
referred to as MLT.
This section includes the following topics:
•
•
•
Configuration — VLANs, Spanning Tree, and Static Link Aggregation using Device Manager
Copyright © 2005-2007, Nortel Networks
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the MAC address of the STG sending the TCN
the port number
the STG ID
"Link aggregation traffic distribution" (page 30)
"Link aggregation rules" (page 30)
"Link aggregation examples" (page 31)
Nortel Ethernet Routing Switch 8300
NN46200-510 03.01 Standard
4.0 27 August 2007
Static link aggregation 29