What is TC11 (Open Alliance Standard)? | NEXTY Electronics, an electronic components and semiconductor trading company

What is TC11?

TC11 is a list of requirements for Ethernet switches specified by the Open Alliance and test items for verifying them.
(TC: Technical Committee)
They are broadly divided into the following categories:
In this column, we have summarized the requirements by category as outlined in TC11.
For details, please refer to "OPEN ALLIANCE TC11 SPEC".

chapter	category	overview
2.2	General	General requirements for automotive SWITCHES
2.3	Address Resolution	Address settings/table requirements
2.4	Virtual LANs (VLANs)	VLAN ID (VID) configuration requirements
2.5	Quality of Service and Audio ⁄ Video Bridging (QOS)	QoS configuration requirements
2.6	Time Synchronization based on Time Sensitive Networking (TSN)	TSN time synchronization requirements
2.7	Quality of Service (QoS)	QoS-related FILTERS requirements
2.8	Filtering of Incoming Frames	FILTERS requirements for incoming packets
2.9	Diagnostic	Counter and diagnostic requirements
2.10	Interface	I/F requirements associated with SWITCHES

Contents listed in each category

The requirements for each category listed in TC11 are outlined below.
Each item has one or more test items listed to verify the requirement.
There are many test items, so we will not go into details in this article.

2.2 General

chapter	Item	overview
1	Operation and Forwarding	SWITCHES operation and forwarding requirements
2	Start Up Performance	Startup requirements such as link time
3	IEEE 802.1X Port-Based Security	Requests for unknown MAC address traffic
4	IEEE 802.1AE MACsec support	MACSEC compliance requirements
5	Port Mirroring	Port Mirroring Requirements
6	Port_Disabling	Request for enabling/disabling each port
7	Handling of Jumbo Frames	Jumbo FRAMES Processing Requirements
8	Read_Out_Device_ID	Request to read Device_ID
9	Frame_buffer_size	FRAMES buffer size requirements
10	Limited_queue_size	Queue size requirements by port
11	Negative_Address_Learning_for_Multicast_Frames	Requests for handling unregistered addresses
12	Port Filtering and Bridge Relaying Rate	Port FILTERS and relaying requirements
13	Block untagged frames with invalid length in the length/type field	Request for a VLAN tagless FRAMES with a different frame length than the configured FRAMES length
14	Block tagged frames with invalid length in the length/type field	Request for a VLAN tagless FRAMES with a different frame length than the configured FRAMES length

2.3 Address Resolution

chapter	Item	overview
1	Address_Learning_with_untagged_frames	Request for MAC address learning for untagged FRAMES with source MAC addresses
2	Address_Learning_with_tagged_frames	Request for MAC address learning for tagged FRAMES with source MAC addresses
3	Address_Learning_read_ARL_table	Request to read the learned ARL table
4	Address_Learning_write_ARL_table	Request to write learned ARL table
5	Address_Learning_aging	MAC Address Table Handling Requirements
6	Address_Learning_aging_time	MAC address table aging time requirements
7	Address_Learning_disable_learning_on_specific_port	Request to enable/disable MAC address learning
8	Address_Learning_behaviour_upon_unknown_destination_address	Request for action when receiving an unknown FRAMES
9	Address_Learning_behaviour_upon_MAAP_destination_address	Request for action when receiving FRAMES with a MAAP address
10	Address_Learning_behaviour_upon_01_80_C2_destination_address	Request for action when receiving FRAMES with a specific address as the destination MAC address

2.4 Virtual LAN (VLAN)

chapter	Item	overview
1	IEEE 802.1Q -VLAN	Requirements related to the IEEE 802.1Q standard
2	Default VLAN ID at ingress port	VLAN ID requirements for input ports
3	Freely configure outer TPID EtherType	Request for outer TPID EtherType setting
4	Dropping double-tagged frames	IEEE 802.1Q requirements for double tag FRAMES processing
5	Switching_VLAN_support_untagging	Request for tagged FRAMES untagging setting for each port
6	VID_based_VLAN_retagging_at_egress	VLAN ID retagging requirements
7	Suppress_VLAN_hopping	IEEE 802.1Q VLAN Hopping Requirements
8	Shared VLAN learning	Shared VLAN learning (SVL) requirements

2.5 Time Synchronization based on Time Sensitive Networking (TSN)

chapter	Item	overview
1	PTP_1_Step_Cloc	Requirements for one-step FRAMES transfer when implementing time measurements correctly
2	PTP_2_Step_Cloc	Requirements for two-step FRAMES transfer when implementing time measurements correctly
3	PTP_1_Step_Clock_Specific_MAC_Header	Request for one-step FRAMES forwarding with a specific MAC header
4	PTP_1_and_2_Step_Clock_simultaneously	Requests for one-step and two-step FRAMES forwarding using specific MAC headers

2.6 Quality of Service (QoS)

chapter	Item	overview
1	Support_of_Priority_Based_Quality_Of_Service	The demand for SWITCHES to support priority-based QoS
2	Support_of_WRR	Requesting priority handling using WRR
3	Mapping_Priority_Information_Based_On_802.1Q	Requirement for setting the PCP field of an input port based on the PCP of a received FRAMES based on the IEEE 802.1Q standard
4	Overwrite_Priority_Of_Frame_at_Ingress_Port	Requirements for setting the PCP field of an input port regardless of the PCP of the received FRAMES based on the IEEE 802.1Q standard
5	Freely_Mappable_Priorities_To_Internal_Queues_1	Requests for prioritizing internal queues
6	Freely_Mappable_Priorities_To_Internal_Queues_2	Requests for prioritizing internal queues
7	Freely_Mappable_To_Egress_Priority	Request for allocating internal queue to PCP at output time
8	Support_Of_8_Shapers_Per_Egress_Port	Requirement for using eight different shapers on output
9	Support_Of_Leaky_Bucket_Algorithm	Leaky bucket requirements
10	Credit_Based_Shaper_1	Credit Based Shaper (CBS) Requirements Based on IEEE 802.1Q Standard
11	Credit_Based_Shaper_2	Credit Based Shaper (CBS) Requirements Based on IEEE 802.1Q Standard
12	Individual_Deactivation_Of_Shaper	Request for individual Shaper deactivation settings

2.7 Configuration

chapter	Item	overview
1	Reconfiguration_Without_Interruption	Request for reconfiguration without disabling or blocking SWITCHES (non-stop forwarding)
2	Individual_configuration_per_Port	Request for all individually configurable port-based features
3	Starting_in_Dont_Forward_Mode	Request for booting in "Don't Forward" mode
4	Read_Back_Written_Configuration_Information	Request to read back all writable configuration information from the DUT
5	Support_Selective_Lock_Down_Of_Items	Request for selective lockdown of configuration items until the DUT's next cold start

2.8 Filtering of Incoming Frames

chapter	Item	overview
1	Rate_limitation_ingress_VID_based	VID-based input rate limiting requirements
2	Rate_limitation_ingress_priority_based	Request for base input rate limiting
3	Broadcast_Storm_Protection	Broadcast Storm Protection Requirements
4	Multicast_Storm_Protection	Multicast Storm Protection Requirements
5	General Filtering Requirements	Per-port policy support requirements
6	VLAN-Related Filtering Rules	VLAN related FILTERS rules
7	Filtering Rules Based on Fields	Field-based FILTERS rule requirements
8	Filtering Rules Based on Upper Layer Addresses	Requirements for upper layer address FILTERS rules

2.9 Diagnostic

chapter	Item	overview
1	Port_Based_Counters	Request for available port-based counters
2	MIB MTU exceeded discards	Request for dot1dBasePortMtuExceededDiscards counter
3	MIB out counters	MIB output counter requests