Users Guide

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.
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.
Table 102. MIB Objects for Viewing the System Image on Flash Partitions
MIB Object OID Description MIB
chSysSwInPartitionAImgVers 1.3.6.1.4.1.6027.3.10.1.2.8.1.11 List the version string of the
system image in Flash Partition
A.
Chassis MIB
chSysSwInPartitionBImgVers 1.3.6.1.4.1.6027.3.10.1.2.8.1.12 List the version string of the
system image in Flash Partition
B.
Chassis MIB
The system image can also be retrieved by performing an SNMP walk on the following OID: MIB Object is chSysSwModuleTable and the
OID is 1.3.6.1.4.1.6027.3.10.1.2.8.
Dell#show interface Tengigabitethernet 1/21/1
TenGigabitEthernet 1/21/1 is up, line protocol is up
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.
Example of SNMP Trap for Monitored Port-Channels
[senthilnathan@lithium ~]$ snmpwalk -v 2c -c public 10.11.1.1 .1.3.6.1.4.1.6027.3.2.1.1
SNMPv2-SMI::enterprises.6027.3.2.1.1.1.1.1.1 = INTEGER: 1
Simple Network Management Protocol (SNMP)
841