SPRUIV7B May 2022 – September 2023 AM620-Q1 , AM623 , AM625 , AM625-Q1 , AM625SIP
The ALE supports port trunking of any port in any of four trunk groups. That is, four trunk groups can be supported with up to eight ports in each trunk group. There are no port adjacency rules for trunk groups. When ports are a member of a trunk group, addresses added and used in the lookup table will refer to the trunk group rather than port as indicated in the lookup table entries. If ports are removed from a trunk group, the ALE will redistribute the traffic based on the crc polynomial of enabled fields and the remaining ports within the trunk group. A trunk group may contain only one port. Packet priority, DA, SA, C-VLAN ID, IPv4SA, IPv4DA, IPv6SA, and/or IPv6DA can be used in the hash to generate destination port within the trunk group. If all hash enables are disabled, the packet can be directed to a particular port within the trunk group which allows for testing paths etc. A host directed frame is directed to the directed port regardless of trunk group settings.
Trunking is controlled through fields in the CPSW_ALE_CTRL2 register and in each ALE CPSW_Iy_ALE_PORTCTL0_y register: