Dell N3200-ON Networking N-Series Switches CLI Reference Guide version 6.8.0 - Page 347

The range of the index is 1..N+1 where N is the size of the history buffer. If a trap has not been sent with the information in the buffer by the time a new entry is added that overwrites an existing entry, the information is lost. If the history buffer size is reduced via configuration, the index is set to 1. If the history size is increased, exiting entries are not disturbed and the index is not adjusted (meaning some existing entries may be overwritten before the new empty entries are filled). Entries greater than the index are cleared (by being overwritten). Use the snmp-server enable traps mac-notification command to enable the sending of traps/informs to SNMP servers. By default, trap and informs are sent to all configured SNMP servers. As MAC address notification has the capability to overwhelm the switch CPU sending traps, it is recommended to use the snmp-server host {informs | traps}... mac-notification to limit the SNMP hosts which will receive trap/informs. The notification contains a list of MAC addresses in the following format: where: • is of size 1 octet and supports the following values: • 0 - End of MIB object. • 1 - MAC learned. • 2 - MAC removed. • VLAN - two octets. • MAC - six octets. • dot1dBasePort - two octets (1.3.6.1.2.1.17.1.4.1.1 from bridge-mib). Each MAC notification is 11 octets per entry - the MACChangedMsg data is packed in consecutive octets with no holes so that it may be copied directly into the message buffer without reformatting. The format is big endian (Network Byte Format). The switch may send more than one SNMP trap or inform every interval. The notification PDU is limited to 1472 octets or 133 MAC addresses. Layer 2 Switching Commands 347