Administrator Guide

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-------------------
R1_E600(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 (congured and uncongured) physical or logical interface, and displays it in the
output of the show interface command.
Dell#show interface fortyGigE 0/4
fortyGigE 0/4 is down, line protocol is down
Description: if_0/4 | if_forty
Hardware is DellForce10Eth, address is 74:86:7a:ff:6f:08
Current address is 74:86:7a:ff:6f:08
Pluggable media not present
Interface index is 51528196
[output omitted]
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 system converts this binary index number to decimal, and displays it in the show command output.
Figure 133. Example of Assigning Interface Index Numbers
Starting from the least signicant bit (LSB) in the preceding gure:
• The rst 14 bits represent the card type of a physical interface or the interface number of a logical interface.
• The next 4 bits represent the interface type.
• The next 12 bits represent the slot and port numbers.
• The next bit is 0 for a physical interface and 1 for a logical interface.
• The last next is unused.
The Slot-Port Number value is derived from the slotId and portId parameters as follows: slotPortNum = ((slotId +1) *
IFM_IFINDEX_MAX_PORTS_PER_SLOT + portId).
The IFM_IFINDEX_MAX_PORTS_PER_SLOT value is 192 (10G). For backward compatibility, the
IFM_IFINDEX_MAX_PORTS_PER_SLOT value is 128 on other Dell Networking switches.
The slotId value is derived as follows: slotId = (slotPortNum / IFM_IFINDEX_MAX_PORTS_PER_SLOT) -1.
The portId value is derived as follows: portId = slotPortNum % IFM_IFINDEX_MAX_PORTS_PER_SLOT.
964
Simple Network Management Protocol (SNMP)