H04L 45/66
Layer 2 routing
Official title: {Layer 2 routing, e.g. in Ethernet based MAN's}
H04L45/66 (Layer 2 routing) appears on 1,745 US grants and 1,895 published applications in this corpus.
Search patents in H04L- Granted patents
- 1,745
- Published applications
- 1,895
- Assignees
- 388
- Inventors
- 2,973
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 2 | 0 |
| 2003 | 1 | 6 |
| 2004 | 0 | 4 |
| 2005 | 3 | 10 |
| 2006 | 1 | 5 |
| 2007 | 3 | 10 |
| 2008 | 2 | 23 |
| 2009 | 12 | 31 |
| 2010 | 28 | 47 |
| 2011 | 28 | 65 |
| 2012 | 43 | 63 |
| 2013 | 65 | 101 |
| 2014 | 87 | 99 |
| 2015 | 106 | 131 |
| 2016 | 117 | 181 |
| 2017 | 126 | 134 |
| 2018 | 149 | 115 |
| 2019 | 170 | 136 |
| 2020 | 147 | 162 |
| 2021 | 136 | 133 |
| 2022 | 135 | 122 |
| 2023 | 112 | 125 |
| 2024 | 124 | 100 |
| 2025 | 89 | 60 |
| 2026 | 55 | 32 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- L1 replicator and switch combination using optical fabric29 Sep 2026US 12,750,328 B2Morgan Stanley Services Group Inc.
- Systems and methods for low convergence time for media access control move events15 Sep 2026US 12,739,200 B2Hewlett Packard Enterprise Development LP
- Layer 3 router and method for routing PRP frames8 Sep 2026US 12,732,452 B2Siemens Canada Limited
- Fast media flow failover in layer 4 networks8 Sep 2026US 12,732,453 B2Microsoft Technology Licensing, LLC
- Next gen zero trust network access (ZTNA) and virtual private network (VPN) including cloud secure access service edge (SASE)1 Sep 2026US 12,726,549 B2Cisco Technology, Inc.
- Small form-factor pluggable device8 Oct 2026US 2026/0312903 A1Schweitzer Engineering Laboratories, Inc.
- Switch port configuration based on silent host type1 Oct 2026US 2026/0303387 A1Hewlett Packard Enterprise Development LP
- Virtual router function sharding for scalable multi-tenant routing1 Oct 2026US 2026/0303524 A1Cisco Technology, Inc.
- Multi-homed layer-2 (l2) service insertion enterprise fabric networks17 Sep 2026US 2026/0281035 A1Cisco Technology, Inc.
- Layer-2 networking storm control in a virtualized cloud environment13 Aug 2026US 2026/0238589 A1Oracle International Corporation
Most cited
By later US patents
- TCP/IP offload network interface device370US 6,434,620 B1Alacritech, Inc. · 2002
- Method and apparatus for exchanging routing information and the establishment of connectivity across multiple network areas342US 8,223,668 B2Rockstar Bidco, LP · 2012
- User-configured on-demand virtual layer-2 network for infrastructure-as-a-service (IaaS) on a hybrid cloud network269US 9,154,327 B1Cisco Technology, Inc. · 2015
- Distributed network subnet259US 9,055,000 B1Juniper Networks, Inc. · 2015
- Routing frames in a trill network using service VLAN identifiers235US 7,787,480 B1Juniper Networks, Inc. · 2010