Patent US6208623B1 successfully refreshed from Google Patents.
US6208623B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of combining PNNI and E-IISP in an asynchronous transfer mode network
Assignee: HP Inc
•
Filing: 1998-04-13
•
Granted: 2001-03-27
•
Expires: 2018-04-13
Abstract
Abstract A method of permitting older networks based on E-IISP routing to operate in newer PNNI based networks. The invention combines the PNNI and E-IISP routing schemes and permits their simultaneous execution in the same ATM network. The E-IISP routing scheme is modified so as to operate in unison with the minimal PNNI implementation configured on each node. The Hello protocol and associated Finite State Machine (FSM) are utilized to determine whether a remote node is in the same peer group. If it is determined that both nodes are in the same peer group, the ports on either side of the link are configured as standard PNNI type ports. If it is determined that the two nodes are from different peer groups, the ports on either of the link are configured as E-IISP type ports. Foreign address information is then exchanged between the two nodes thus permitting border nodes to learn about other peer groups from their respective remote nodes. Relatively large networks can be constructed that do not have any hierarchy as in networks running the full PNNI standard. Via the Hello protocol, changes made to links between nodes will be detected immediately and the port configuration modified appropriately.
Inventors
- 👤 Haim Rochberger
- 👤 Alexander Or
- 👤 Michael Gorokhovsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:33
CPC Classifications
H; H04; H04L; H04L45/00; H04L45/02; H04L45/04; H04L12/00; H04L12/54; H04L12/56; H04L12/5601; H04L45/52; H04L2012/5619; H04L2012/5621
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
217 words
In an Asynchronous Transfer Mode (ATM) network having a plurality of nodes, said plurality of nodes configured to form one or more peer groups connected by one or more links, each node having a topology database and being capable of configuring each of its ports as either a Private Network Node Interface (PNNI) type port or an Enhanced Interim Inter-Switch Signaling Protocol (E-IISP) type port, a method of building ATM networks combining both PNNI and E-IISP schemes, said method comprising the steps of: determining, on each node connected to a remote node via a link, whether the node and its remote node are from the same peer group; configuring the port associated with the link as a PNNI type port if said node and its remote node are from the same peer group; configuring the port associated with the link as an E-IISP type port if said node and its remote node are not from the same peer group; transferring from the node to the remote node, all foreign addresses in the topology database of the node: registering said foreign addresses received by the remote node in the topology database of the remote node; and flooding said foreign addresses from the remote node to other nodes that are members of the peer group of the remote node.
Claim 2
Dependent Claim
217 words
In an Asynchronous Transfer Mode (ATM) network having a plurality of nodes, said plurality of nodes configured to form one or more peer groups connected by one or more links, each node having a topology database and being capable of configuring each of its ports as either a Private Network Node Interface (PNNI) type port or an Enhanced Interim Inter-Switch Signaling Protocol (E-IISP) type port, a method of building ATM networks combining both PNNI and E-IISP schemes, said method comprising the steps of: determining, on each node connected to a remote node via a link, whether the node and its remote node are from the same peer group; configuring the port associated with the link as a PNNI type port if said node and its remote node are from the same peer group; configuring the port associated with the link as an E-IISP type port if said node and its remote node are not from the same peer group; transferring from the node to the remote node, all foreign addresses in the topology database of the node: registering said foreign addresses received by the remote node in the topology database of the remote node; and flooding said foreign addresses from the remote node to other nodes that are members of the peer group of the remote node.
Claim 3
Dependent Claim
68 words
The method according to claim 1 , wherein said step of determining comprises the steps of: executing a Hello protocol and associated Finite State Machine (FSM) of PNNI on each port configured as a non User to Network Interface (UNI) port; and extracting a peer group ID from Hello messages received from a remote node located on the other side of the link each port is connected to.
Claim 4
Dependent Claim
29 words
The method according to claim 1 , further comprising the step of executing a conventional Hello protocol and PNNI Topology State Elements (PTSE) Finite State Machines (FSMs) of PNNI.
Claim 5
Dependent Claim
49 words
The method according to claim 1 , further comprising the step of executing a conventional Hello protocol and PNNI Topology State Elements (PTSE) Finite State Machines (FSMs) of PNNI on each port regardless of whether the port is configured as a PNNI type port or an E-IISP type port.
Claim 6
Dependent Claim
41 words
The method according to claim 1 , further comprising the step of changing the configuration of a port from a PNNI type port to an E-IISP type port in response to one or more changes to the configuration of the network.
Claim 7
Dependent Claim
41 words
The method according to claim 1 , further comprising the step of changing the configuration of a port from an E-IISP type port to a PNNI type port in response to one or more changes to the configuration of the network.
Claim 8
Dependent Claim
33 words
The method according to claim 1 , further comprising the step of transferring and registering the foreign addresses from the node to the remote node utilizing the Interim Local Management Interface (ILMI) protocol.
Claim 9
Dependent Claim
31 words
The method according to claim 1 , further comprising the step of transferring from the remote node to the node, all foreign addresses in the topology database of the remote node.
Claim 10
Dependent Claim
30 words
The method according to claim 1 , further comprising the step of registering foreign addresses, received by the node from the remote node, in the topology database of the node.
Claim 11
Dependent Claim
33 words
The method according to claim 1 , further comprising the step of transferring and registering the foreign addresses from the remote node to the node utilizing the Interim Local Management Interface (ILMI) protocol.
References Cited (Backward Citations)
US5455865A
Cited
US5420862A
Cited
US5291477A
Cited
US5361256A
Cited
US5483536A
Cited
US5491690A
Cited
US5495479A
Cited
US5649108A
Cited
US5600638A
Cited
US5544327A
Cited
US5590118A
Cited
US5550818A
Cited
US5566014A
Cited
US5673263A
Cited
US5603029A
Cited
US5629930A
Cited
US5781529A
Cited
US5831975A
Cited
US5940396A
Cited
US6061736A
Cited
US6115752A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2004-03-26 | 2004-09-25 | 2005-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-03-26 | 2008-09-25 | 2009-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-03-26 | 2012-09-25 | 2013-03-27 | $7700.00 | Window Closed / Lapsed |