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Figure 105. Wrapback in Dual-Ring Topology
8.12.1 Trunk Wrapping on the Active Per-Port Switching Modules
The 18-port active per-port switching module and the 10-port dual fiber repeater
module conform to the 802.5C dual-ring reconfiguration practice.
When, during the beacon recovery process, it is determined that the fault domain
is between RI and RO, the following process takes place:
1. DRA is inserted on the primary path and URA is inserted on the backup path
between RI and RO ports.
2. Faulty trunk is located and wrapped using dual-ring recovery methods.
3. URA and DRA are de-inserted.
4. DMM and Merge Manager (see 8.12.3, “Merge Manager” on page 170) are
notified of the action taken.
This is shown in Figure 106 on page 169.
168 8260 Multiprotocol Intelligent Switching Hub