Dell PowerSwitch S4820T Configuration Guide for the S4820T System 9.112.0P1 - Page 861

The value of dot1dTpFdbPort is the port number of the port off which the system learns the MAC address. In this case, of TenGigabitEthernet 1/21, the manager returns the integer 118. Example of Fetching MAC Addresses Learned on the Default VLAN Using SNMP MAC Addresses on Force10 System Dell#show mac-address-table VlanId Mac Address Type Interface State 1 00:01:e8:06:95:ac Dynamic Te 1/21 Active Query from Management Station >snmpwalk -v 2c -c techpubs 10.11.131.162 .1.3.6.1.2.1.17.4.3.1 SNMPv2-SMI::mib-2.17.4.3.1.1.0.1.232.6.149.172 = Hex-STRING: 00 01 E8 06 95 AC Example of Fetching MAC Addresses Learned on a Non-default VLAN Using SNMP In the following example, TenGigabitEthernet 1/21 is moved to VLAN 1000, a non-default VLAN. To fetch the MAC addresses learned on non-default VLANs, use the object dot1qTpFdbTable. The instance number is the VLAN number concatenated with the decimal conversion of the MAC address. MAC Addresses on Force10 System------------ Dell#show mac-address-table VlanId Mac Address Type Interface State 1000 00:01:e8:06:95:ac Dynamic Te 1/21 Active Query from Management Station >snmpwalk -v 2c -c techpubs 10.11.131.162 .1.3.6.1.2.1.17.7.1.2.2.1 Example of Fetching MAC Addresses Learned on a Port-Channel Using SNMP Use dot3aCurAggFdbTable to fetch the learned MAC address of a port-channel. The instance number is the decimal conversion of the MAC address concatenated with the port-channel number. MAC Addresses on Force10 System Dell(conf)#do show mac-address-table VlanId Mac Address Type Interface State 1000 00:01:e8:06:95:ac Dynamic Po 1 Active Query from Management Station >snmpwalk -v 2c -c techpubs 10.11.131.162 .1.3.6.1.4.1.6027.3.2.1.1.5 SNMPv2-SMI::enterprises.6027.3.2.1.1.5.1.1.1000.0.1.232.6.149.172.1 = INTEGER: 1000 SNMPv2-SMI::enterprises.6027.3.2.1.1.5.1.2.1000.0.1.232.6.149.172.1 = Hex-STRING: 00 01 E8 06 95 AC SNMPv2-SMI::enterprises.6027.3.2.1.1.5.1.3.1000.0.1.232.6.149.172.1 = INTEGER: 1 SNMPv2-SMI::enterprises.6027.3.2.1.1.5.1.4.1000.0.1.232.6.149.172.1 = INTEGER: 1 Deriving Interface Indices The Dell Networking OS assigns an interface index to each (configured and unconfigured) physical and logical interface, and displays it in the output of the show interface command. The interface index is a binary number with bits that indicate the slot number, port number, interface type, and card type of the interface. Dell Networking OS converts this binary index number to decimal, and displays it in the output of the show interface command. Starting from the least significant bit (LSB): • the first 14 bits represent the card type • the next 4 bits represent the interface type • the next 7 bits represent the port number • the next 5 bits represent the slot number • the next 1 bit is 0 for a physical interface and 1 for a logical interface • the next 1 bit is unused For example, the index 72925242 is 100010110001100000000111010 in binary. The binary interface index for TeGigabitEthernet 1/21 of a 48port 10/100/1000Base-T line card with RJ-45 interface. Notice that the physical/logical bit and the final, unused bit are not given. The interface is physical, so represent this type of interface by a 0 bit, and the unused bit is always 0. These 2 bits are not given because they are the most significant bits, and leading zeros are often omitted. Simple Network Management Protocol (SNMP) 861