Note
This feature is only applicable for the Extreme 8720, Extreme 8520, SLX 9250, and SLX 9150 devices.
Due to limited resources in the Extreme 8720, Extreme 8520, SLX 9250, and SLX 9150 devices, it is possible that the dynamically learned and statically configured MACs may cause the MAC table to get filled up to its maximum number of entries. These devices can support a maximum of 96,000 (Ninety Six Thousand) MAC entries.
Once the MAC table usage goes beyond the user configurable high threshold limit, it might cause entries not to be properly programmed in the MAC table and could lead to flooding. Users are notified on such events happening through log entries.
Similarly, when MAC Collisions happen, users are notified through log entries and stale entries are automatically removed from the MAC Table. For every MAC collision, a RAS Log entry is generated. However, this generation is rate limited to a maximum of 4 notifications every 30 seconds. The last 256 collisions with time-stamp are also stored for debugging purposes.
The following is an example of the RAS Log that is generated for every MAC Collision that occurs.
DUT7# 2024/09/20-06:56:57, [HSL-1069], 28029, DCE, ERROR, DUT7, MAC collision occurred in HW for MAC:[0000.0001.376d], VlanId/BDId:100 (V)
The following additional RAS Log entries are generated when the available resources exceed or reach specified levels. This message is generated when the MAC Address Table reaches the configured High Threshold Limit.
2024/09/17-10:02:32, [L2SS-1036], 24829, DCE, INFO, DUT7, MAC-address-table reached the high threshold limit of 85 percent
This message is generated when the MAC address table reaches 100% of its guaranteed limit.
2024/09/17-10:02:38, [L2SS-1031], 24830, DCE, INFO, DUT7, MAC-address-table has reached 100 percent full.