Knoxville Regional ITS Architecture

US: NTCIP Transportation Sensors - SNMPv3/TLS

Description

This solution is used within the U.S.. It combines standards associated with US: NTCIP Transportation Sensors with those for I–F: SNMPv3/TLS. The US: NTCIP Transportation Sensors standards include upper–layer standards required to implement center–to–field transportation sensors (e.g., vehicle detectors) communications (e.g., real–time). The I–F: SNMPv3/TLS standards include lower–layer standards that support secure center–to–field and field–to–field communications using simple network management protocol (SNMPv3); implementations are strongly encouraged to use the TLS for SNMP security option for this solution to ensure adequate security.

Includes Standards

Level	DocNum	FullName	Description
Mgmt	NTCIP 1201	NTCIP Global Object (GO) Definitions	This standard defines SNMP objects (data elements) used by a wide range of field devices like time and versioning information.
Mgmt	IETF RFC 3411	An Architecture for Describing Simple Network Management Protocol (SNMP) Management Frameworks	This standard (RFC) defines the basic architecture for SNMPv3 and includes the definition of information objects for managing the SNMP entity's architecture.
Mgmt	IETF RFC 3412	Message Processing and Dispatching for the Simple Network Management Protocol (SNMP)	This standard (RFC) contains a MIB that assists in managing the message processing and dispatching subsystem of an SNMP entity.
Mgmt	IETF RFC 3413	Simple Network Management Protocol (SNMP) Applications	This standard (RFC) includes MIBs that allow for the configuration and management of remote Targets, Notifications, and Proxys.
Mgmt	IETF RFC 3414	User–based Security Model (USM) for version 3 of the Simple Network Management Protocol (SNMPv3)	This standard (RFC) contains a MIB that assists in configuring and managing the user–based security model.
Mgmt	IETF RFC 3415	View–based Access Control Model (VACM) for the Simple Network Management Protocol (SNMP)	This standard (RFC) contains a MIB that supports the configuration and management of the View–based access control model of SNMP.
Mgmt	IETF RFC 3416	Version 2 of the Protocol Operations for the Simple Network Management Protocol (SNMP)	This standard (RFC) defines the message structure and protocol operations used by SNMPv3.
Mgmt	IETF RFC 3418	Management Information Base (MIB) for the Simple Network Management Protocol (SNMP)	This standard (RFC) defines the MIB to configure and manage an SNMP entity.
Mgmt	IETF RFC 4293	Management Information Base for the Internet Protocol (IP)	This standard (RFC) defines the MIB that manages an IP entity.
Security	IETF RFC 6353	Transport Layer Security (TLS) Transport Model for the Simple Network Management Protocol (SNMP)	This standard (RFC) defines how to use the TLS authentication service to provide authentication within the access control mechanism of SNMP.
ITS Application Entity	NTCIP 1209	NTCIP Object Definitions for Transportation Sensor Systems (TSS)	This standard defines SNMP objects (data elements) to monitor and control transportation system sensors that measure real–time vehicular traffic information.
Facilities	NTCIP 1209	NTCIP Object Definitions for Transportation Sensor Systems (TSS)	This standard defines SNMP objects (data elements) to monitor and control transportation system sensors that measure real–time vehicular traffic information.
Facilities	IETF RFC 3411	An Architecture for Describing Simple Network Management Protocol (SNMP) Management Frameworks	This standard (RFC) defines the basic architecture for SNMPv3 and includes the definition of information objects for managing the SNMP entity's architecture.
Facilities	IETF RFC 3412	Message Processing and Dispatching for the Simple Network Management Protocol (SNMP)	This standard (RFC) contains a MIB that assists in managing the message processing and dispatching subsystem of an SNMP entity.
Facilities	IETF RFC 3413	Simple Network Management Protocol (SNMP) Applications	This standard (RFC) includes MIBs that allow for the configuration and management of remote Targets, Notifications, and Proxys.
Facilities	IETF RFC 3414	User–based Security Model (USM) for version 3 of the Simple Network Management Protocol (SNMPv3)	This standard (RFC) contains a MIB that assists in configuring and managing the user–based security model.
Facilities	IETF RFC 3415	View–based Access Control Model (VACM) for the Simple Network Management Protocol (SNMP)	This standard (RFC) contains a MIB that supports the configuration and management of the View–based access control model of SNMP.
Facilities	IETF RFC 3416	Version 2 of the Protocol Operations for the Simple Network Management Protocol (SNMP)	This standard (RFC) defines the message structure and protocol operations used by SNMPv3.
TransNet	IETF RFC 2460	Internet Protocol, Version 6 (IPv6) Specification	This standard (RFC) specifies version 6 of the Internet Protocol (IPv6), also sometimes referred to as IP Next Generation or IPng.
TransNet	IETF RFC 4291	IP Version 6 Addressing Architecture	This standard (RFC) defines the addressing architecture of the IP Version 6 (IPv6) protocol. It includes the IPv6 addressing model, text representations of IPv6 addresses, definition of IPv6 unicast addresses, anycast addresses, and multicast addresses, and an IPv6 node's required addresses.
TransNet	IETF RFC 4443	Internet Control Message Protocol (ICMPv6) for the Internet Protocol Version 6 (IPv6) Specification	This standard (RFC) defines the control messages to manage IPv6.
TransNet	IETF RFC 793	Transmission Control Protocol	This standard (RFC) defines the main connection–oriented Transport Layer protocol used on Internet–based networks.
Access	NTCIP 2104	NTCIP SP–Ethernet	This standard defines the Access Layer for center–to–field communications where the local connection is some variant of Ethernet.

Readiness: High–Moderate

Readiness Description

One significant or possibly a couple minor issues. For existing deployments, the chosen solution likely has identified security or management issues not addressed by the communications solution. Deployers should consider additional security measures, such as communications link and physical security as part of these solutions. They should also review the management issues to see if they are relevant to their deployment and would require mitigation. For new deployments, the deployment efforts should consider a path to addressing these issues as a part of their design activities. The solution does not by itself provide a fully secure implementation without additional work.

Issues

Issue	Severity	Description	Associated Standard	Associated Triple
Data not fully defined (medium)	Medium	Some of the data elements for this information flow are not fully defined.	(None)	City of Oak Ridge Field Equipment=>traffic situation data=>City of Oak Ridge TOC
Out of date (medium)	Medium	The standard includes normative references to other standards that have been subject to significant changes that can impact interoperability or security of systems and the industry has not specified if and how these updates should be implemented for deployments of this standard.	IETF RFC 6353 TLS for SNMP	(All)
Use case not considered in design (medium)	Medium	While the indicated standards nominally address the information flow, the design may not meet practical constraints because this particular use case was not the focus of the design effort.	(None)	City of Oak Ridge Field Equipment=>traffic situation data=>City of Oak Ridge TOC
Update data to SNMPv3	Low	Data has been defined for SNMPv1, but needs to be updated to SNMPv3 format.	(None)	(All)
Use TLS for SNMP Option	Low	The standard allows for multiple security mechanisms. The only defined mechanism that meets the requirements for C–ITS is the one based on TLS.	(None)	(All)

Supports Interfaces

Source	Destination	Flow
City of Alcoa Field Sensors	City of Maryville/Alcoa TOC	traffic detector data
City of Knoxville Field Sensors	City of Knoxville TOC	traffic detector data
City of Knoxville TOC	City of Knoxville Field Sensors	traffic detector control
City of Lenoir City Field Sensors	City of Lenoir City TOC	traffic detector data
City of Lenoir City TOC	City of Lenoir City Field Sensors	traffic detector control
City of Maryville CCTV Cameras	City of Maryville/Alcoa TOC	traffic detector data
City of Maryville Field Sensors	City of Maryville/Alcoa TOC	traffic detector data
City of Maryville/Alcoa TOC	City of Alcoa Field Sensors	traffic detector control
City of Maryville/Alcoa TOC	City of Maryville Field Sensors	traffic detector control
City of Oak Ridge Field Equipment	City of Oak Ridge TOC	traffic situation data
City of Oak Ridge Field Sensors	City of Oak Ridge TOC	traffic detector data
City of Oak Ridge TOC	City of Oak Ridge Field Sensors	traffic detector control
City of Sevierville Field Sensors	City of Sevierville/Pigeon Forge TOC	traffic detector data
City of Sevierville/Pigeon Forge TOC	City of Sevierville Field Sensors	traffic detector control
Knox County Field Sensors	Knox County TOC	traffic detector data
Knox County TOC	Knox County Field Sensors	traffic detector control
Municipal Field Sensors	Municipal TOC	traffic detector data
Municipal TOC	Municipal Field Sensors	traffic detector control
TDOT Field Sensors	TDOT Region 1 TMC – Knoxville	traffic detector data
TDOT Region 1 TMC – Knoxville	TDOT Field Sensors	traffic detector control
Town of Farragut Field Sensors	Town of Farragut TOC	traffic detector data
Town of Farragut TOC	Town of Farragut Field Sensors	traffic detector control