Reference Guide

1002 | Simple Network Management Protocol
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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.
Figure 48-24. Fetching Dynamic MAC Addresses on the Default VLAN
Deriving Interface Indices
FTOS assigns an interface number to each (configured or unconfigured) physical and logical interface.
Display the interface index number using the command
show interface from EXEC Privilege mode, as
shown in Figure 48-25.
Figure 48-25. Display the Interface Index Number
The interface index is a binary number with bits that indicate the slot number, port number, interface type,
and card type of the interface. FTOS converts this binary index number to decimal, and displays it in the
output of the
show interface command.
Figure 48-26. Interface Index Binary Calculations
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
-----------------------------MAC Addresses on FTOS 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
FTOS#show interface gig 1/21
GigabitEthernet 1/21 is up, line protocol is up
Hardware is Force10Eth, address is 00:01:e8:0d:b7:4e
Current address is 00:01:e8:0d:b7:4e
Interface index is 72925242
[output omitted]
FTOS#show linecard all | grep 1
1 online online E48TF E48TF 7.7.1.1 48
Card Type
Interface Type
Port Number
Slot Number
14 bits
4 bits
7 bits
1 bit
Unused
5 bits
1 bit
P/L Flag