Deriving Interface Indices - Dell S4048–ON Configuration Manual

VlanId Mac Address
1000 00:01:e8:06:95:ac
---------------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
1000 00:01:e8:06:95:ac
-------------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 48-
port 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.
NOTE: The interface index does not change if the interface reloads or fails over. If the unit is renumbered (for any reason) the
interface index changes during a reload.
To display the interface number, use the following command.
• Display the interface index number.
EXEC Privilege mode
show interface
Example of Deriving the Interface Index Number
To view the system image on Flash Partition A, use the chSysSwInPartitionAImgVers object or, to view the system image on Flash Partition
B, use the chSysSwInPartitionBImgVers object.
890 Simple Network Management Protocol (SNMP)
Type Interface
Dynamic Te 1/21
Type Interface
Dynamic Po 1
State
Active
State
Active