Concept Guide

>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 Dynamic MAC Addresses on a Non-default VLANs
In the following example, TenGigabitEthernet 0/7 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 Dell Networking
System-------------------------------
Dell#show mac-address-table
VlanId Mac Address Type Interface State
1000 00:01:e8:06:95:ac Dynamic Tengig 0/7 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
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 Dell Networking
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 number to each (congured or uncongured) physical and logical interface. Display the
interface index number using the
show interfacecommand from EXEC Privilege mode, as shown in the following example.
The interface index is a binary number with bits that indicate the slot number, port number, interface type, and card type of the interface.
The 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 signicant bit (LSB):
• the rst 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 44634369 is 10101010010001000100000001 in binary. The binary interface index for TenGigabitEthernet 0/4 of an
Aggregator. Notice that the physical/logical bit and the nal, unused bit are not given. The interface is physical, so this must be represented
by a 0 bit, and the unused bit is always 0. These two bits are not given because they are the most signicant bits, and leading zeros are
often omitted.
For interface indexing, slot and port numbering begins with binary one. If the Dell Networking system begins slot and port numbering from
0, binary 1 represents slot and port 0. In the Aggregator the rst interface is 0/1 and 0/0s Index is unused and Index creation logic is not
changed. Because Zero is reserved for logical interfaces, it starts from 1. For the rst interface, port number is set to 1. Adding it causes an
increment by 1 for the next interfaces, so it only starts from 2. Therefore, the port number is set to 4 for 0/3.
802
Simple Network Management Protocol (SNMP)