Network Study Site

Control Plane Policing (CoPP)

2022 Sept 8

Control Plane Policint CoPP Many services require regular communication with the control plane of network equipment. If the control plane is overloaded, services may suffer and be interrupted. Control plane policing provides a method to protect the control plane by rate-limiting or filtering ...

Object Tracking

2022 Aug 31

Object Tracking Object tracking enables taking proactive actions based on the status of tracked objects. For example, the status of an IP SLA, status of a weighted list of multiple IP SLAs, or the presence of routes in the RIB can be tracked to trigger actions. This provides a centralized mechanism for sharing the state ...

IP SLA

2022 Aug 26

IP SLA An IP SLA can send different types of network traffic at regular intervals. This is useful for monitoring IT systems and the networks connecting them. For example, an IP SLA can test a TCP or UDP port, confirm the availability of a file via FTP, or measure the network delay to a specific IP address ...

Router on a Stick

2022 Aug 25

Router on a Stick A router-on-a-stick (ROAS) solution provides inter-VLAN connectivity by configuring a router with subinterfaces in each VLAN. A subinterface is a logical interface, and it is configured under a single physical interface connecting to a downstream switch through a trunk link ...

EtherChannel

2022 Aug 22

EtherChannel EtherChannel is a link aggregation technology used between switches or routers for improved fault tolerance and added overall bandwidth. Layer-2 and Layer-3 EtherChannels can be configured using PAgP, LACP or by static settings on both ends of a connected physical link ...

Private VLAN

2022 Aug 21

Private VLAN A VLAN can be segmented into smaller broadcast domains using Private VLANs. A PVLAN is also called a secondary VLAN and is configured within a primary "regular" VLAN. Several PVLANs can exist within a single primary VLAN. There are isolated and community PVLANs which can further restrict ...

VLAN tagging and trunking

2022 Aug 16

VLAN tagging and trunking Virtual Local Area Networks (VLAN) enable logical separation of a network into multiple isolated subnets. Each VLAN is an independent broadcast domain. The 802.1Q standard defines the technology behind VLANs, and enables Ethernet links to carry traffic for multiple VLANs. These links are called ...

BGP Confederation

2022 Aug 4

BGP Confederation BGP Confederations allow for the segmentation of a BGP Autonomous System (AS) into sub-ASs. Within each sub-AS there is a requirement for a full-mesh between iBGP peers. However, no full-mesh is required between two separate sub-ASs. BGP route attributes do not change ...

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