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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 (configured or unconfigured) 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 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 44634369 is 10101010010001000100000001 in binary. The binary interface index for TenGigabitEthernet
0/4 of an Aggregator. Notice that the physical/logical bit and the final, 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
significant 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 first interface is 0/1 and 0/0s Ifindex is unused
and Ifindex creation logic is not changed. Because Zero is reserved for logical interfaces, it starts from 1. For the first 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.
Dell#show interface tengig 0/2
TenGigabitEthernet 0/2 is up, line protocol is up
Hardware is Dell Force10Eth, address is 00:01:e8:0d:b7:4e
Current address is 00:01:e8:0d:b7:4e
Interface index is 72925242
[output omitted]
Monitor Port-Channels
To check the status of a Layer 2 port-channel, use f10LinkAggMib (.1.3.6.1.4.1.6027.3.2). In the following example, Po 1 is a
switchport and Po 2 is in Layer 3 mode.
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.
Simple Network Management Protocol (SNMP) 733