(54) STACK MANAGER PROTOCOL WITH
AUTOMATIC SET UP MECHANISM
(75) Inventors: Ignatius Santoso, Thousand Oaks, CA
(US); Roberto Henrique Jacob da
Silva, Calabasas, CA (US); Timothy
Hicks, Newbury Park, CA (US); Vincent
Magret, Oak Park, CA (US)
(73) Assignee: Alcatel Lucent, Paris (FR)
( * ) Notice: Subject to any disclaimer, the term of this patent is extended or adjusted under 35 U.S.C. 154(b) by 563 days.
(21) Appl.No.: 11/027,458
(22) Filed: Dec. 29, 2004
(65) Prior Publication Data
US 2006/0092853 Al May 4, 2006
Related U.S. Application Data
(60) Provisional application No. 60/623,370, filed on Oct. 28, 2004.
(51) Int. CI.
(52) U.S. CI 370/244; 370/218; 370/252;
(58) Field of Classification Search 370/400,
370/386, 244 See application file for complete search history.
(56) References Cited
U.S. PATENT DOCUMENTS
5,505,203 A 4/1996 Deitrich et al.
5,737,311 A * 4/1998 Wyld 370/227
5,805,817 A * 9/1998 Yu et al 709/224
A stack switch for performing pass-through forwarding operations, assigning stack switch identifiers to a plurality of stack switches, temporarily disabling supervision messages exchanged by stack switches, and electing a primary master stack switch is disclosed. In the pass-through mode, the stack switch automatically forwards packets between stack ports independent of their destination address to maintain connectivity between adjacent stack switches while conventional bridging and routing operations are disabled. The sequential identifiers are also preferably assigned in accordance with the sequential position of the various stack switches to better reflect the topology of those switches. The switch is also preferably adapted to temporarily disable the transmission of supervision messages between stack switches to prevent reassignment of network management functions when switch resources are low. The switch may execute a stack switch identifier numbering scheme based on the time the switch became operational.
11 Claims, 12 Drawing Sheets