公开(公告)号：US20240348554A1

公开(公告)日：2024-10-17

申请号：US18133975

申请日：2023-04-12

申请人： Cisco Technology, Inc.

发明人： Balaji Sundararajan ,  Ganesh Devendrachar ,  Avinash Shah ,  Preety Mordani ,  Satyajit Das ,  Michael John Moskal

IPC分类号： H04L47/43 ,  H04L47/36

CPC分类号： H04L47/43 ,  H04L47/36

摘要： Techniques are described for avoiding data packet fragmentation in a routing device such as a router or network switch. Path Maximum Transport Unit (PMTU) values are monitored for a plurality of egress links of a networking device. A statistical analysis of fragmentation rates is performed. The statistical analysis can be performed on a per-link basis, per-flow basis or both per-link and per-flow basis. If the packet fragmentation rate of data flows through a particular egress link exceeds a determined threshold value, one or more data flows can be re-routed to a different egress link having a higher PMTU, thereby preventing data packet fragmentation.

公开(公告)号：US20240146565A1

公开(公告)日：2024-05-02

申请号：US17979255

申请日：2022-11-02

申请人： Cisco Technology, Inc.

发明人： Ajeet Pal Singh Gill ,  Balaji Sundararajan ,  Srilatha Tangirala ,  Nithin Bangalore Raju ,  Ravi Kiran Chintallapudi ,  Pradeepan Kannawadi ,  Ganesh Devendrachar

IPC分类号： H04L12/28 ,  H04L67/10

CPC分类号： H04L12/28 ,  H04L67/10

摘要： Techniques for virtualizing tenant transport interfaces configured to implement per-tenant network routing attribute differentiation in each tenant overlay of a multisite wide area network (WAN) and share the virtual transport interfaces between multi-tenant edge (MTE) devices providing transport services to tenant devices based on a defined tenant tier model. A Software-Defined Networking (SDN) controller may receive a physical transport interface and/or a device type associated with a tenant device. The SDN controller may determine a virtual transport interface for the tenant device based on a tier associated with the tenant. MTE device(s) may utilize the physical transport interface to establish sessions with other MTE device(s) in the WAN. The virtual transport interface may be utilized by MTE devices to implement and/or enforce network routing attributes when forwarding network traffic associated with the tenant via the sessions established between the MTE devices through the WAN.

公开(公告)号：US11962429B1

公开(公告)日：2024-04-16

申请号：US17979255

申请日：2022-11-02

申请人： Cisco Technology, Inc.

发明人： Balaji Sundararajan ,  Srilatha Tangirala ,  Ajeet Pal Singh Gill ,  Nithin Bangalore Raju ,  Ravi Kiran Chintallapudi ,  Pradeepan Kannawadi ,  Ganesh Devendrachar

IPC分类号： H04L12/28 ,  H04L67/10

CPC分类号： H04L12/28 ,  H04L67/10

摘要： Techniques for virtualizing tenant transport interfaces configured to implement per-tenant network routing attribute differentiation in each tenant overlay of a multisite wide area network (WAN) and share the virtual transport interfaces between multi-tenant edge (MTE) devices providing transport services to tenant devices based on a defined tenant tier model. A Software-Defined Networking (SDN) controller may receive a physical transport interface and/or a device type associated with a tenant device. The SDN controller may determine a virtual transport interface for the tenant device based on a tier associated with the tenant. MTE device(s) may utilize the physical transport interface to establish sessions with other MTE device(s) in the WAN. The virtual transport interface may be utilized by MTE devices to implement and/or enforce network routing attributes when forwarding network traffic associated with the tenant via the sessions established between the MTE devices through the WAN.

公开(公告)号：US12095652B1

公开(公告)日：2024-09-17

申请号：US18328566

申请日：2023-06-02

申请人： Cisco Technology, Inc.

发明人： Balaji Sundararajan ,  Satish Kumar Mahadevan ,  Ramakumara Kariyappa ,  Ganesh Devendrachar ,  Arul Murugan Manickam ,  Samir D Thoria ,  Pritam Baruah ,  Deepa Rajendra Sangolli ,  Avinash Shah

IPC分类号： H04L45/17 ,  H04L43/0817 ,  H04L45/24

CPC分类号： H04L45/17 ,  H04L43/0817 ,  H04L45/24

摘要： Techniques are described for suppressing data plane traffic using a service monitoring policy for data plane control. If a service provided to a router becomes nonfunctional, preventing the router from being able to forward traffic to a next-hop device, data plane traffic from client devices on the data plane that requires the use of the nonfunctioning service is suppressed. Additionally, new communication pathways to the router that will use the nonfunctioning service are prevented from being established. Traffic is redirected to another router with a functioning service. Thus, traffic that may normally be directed to the router with the nonfunctioning service and not able to be forwarded (e.g., blackholing of data) can be forwarded to the other router.

公开(公告)号：US12068959B1

公开(公告)日：2024-08-20

申请号：US18225487

申请日：2023-07-24

申请人： Cisco Technology, Inc.

发明人： Ganesh Devendrachar ,  Ajeet Pal Singh Gill ,  Balaji Sundararajan ,  Srilatha Tangirala ,  Satish Varadarajula ,  Satyajit Das

IPC分类号： H04L45/76 ,  H04L45/24 ,  H04L47/125

CPC分类号： H04L45/76 ,  H04L45/24 ,  H04L47/125

摘要： Techniques for automatically providing per tenant weighted DCMP over shared transport interfaces and automated flow has load balancing are described. The techniques may include onboarding the tenant to the local multi-tenant edge device associated with a tenant, where the resource profile defines a traffic allowance per transport interface for the tenant. Local weight per transport interface is applied. Information including local weight per transport interface is transmitted to a remote device via an SD-WAN controller. Information including a remote weight per transport interface of the remote device is received via the SD-WAN controller. Traffic is routed from the tenant based on local weight per transport interface of the local device and remote weight per transport interface of the remote device.

公开(公告)号：US20240223397A1

公开(公告)日：2024-07-04

申请号：US18608677

申请日：2024-03-18

申请人： Cisco Technology, Inc.

发明人： Balaji Sundararajan ,  Ajeet Pal Singh Gill ,  Srilatha Tangirala ,  Nithin Bangalore Raju ,  Ravi Kiran Chintallapudi ,  Pradeepan Kannawadi ,  Ganesh Devendrachar

IPC分类号： H04L12/28 ,  H04L67/10

CPC分类号： H04L12/28 ,  H04L67/10

摘要： Techniques for virtualizing tenant transport interfaces configured to implement pertenant network routing attribute differentiation in each tenant overlay of a multisite wide area network (WAN) and share the virtual transport interfaces between multi-tenant edge (MTE) devices providing transport services to tenant devices based on a defined tenant tier model. A Software-Defined Networking (SDN) controller may receive a physical transport interface and/or a device type associated with a tenant device. The SDN controller may determine a virtual transport interface for the tenant device based on a tier associated with the tenant. MTE device(s) may utilize the physical transport interface to establish sessions with other MTE device(s) in the WAN. The virtual transport interface may be utilized by MTE devices to implement and/or enforce network routing attributes when forwarding network traffic associated with the tenant via the sessions established between the MTE devices through the WAN.