Concept Guide

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 (congured or uncongured) 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 signicant bit (LSB):
• the rst 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 0/41 of an
Aggregator. Notice that the physical/logical bit and the nal, 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 signicant 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 S4810, the rst interface is 0/0, but in the Aggregator the rst interface is 0/1. Hence, in the
Aggregator 0/0s Index is unused and Index creation logic is not changed. Because Zero is reserved for logical interfaces, it starts from 1.
For the rst 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 42 for 0/41.
Example of Deriving the Interface Index Number
Dell#show interface tengig 1/21
TenGigabitEthernet 1/21 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]
MIB Support to Display Egress Queue Statistics
Dell Networking OS provides MIB objects to display the information of the packets transmitted or dropped per unicast or multicast egress
queue. The following table lists the related MIB objects:
Table 25. MIB Objects to display egress queue statistics
MIB Object OID Description
dellNetFpEgrQTxPacketsRate 1.3.6.1.4.1.6027.3.27.1.20.1.6 Rate of Packets transmitted per Unicast/
Multicast Egress queue.
dellNetFpEgrQTxBytesRate 1.3.6.1.4.1.6027.3.27.1.20.1.7 Rate of Bytes transmitted per Unicast/
Multicast Egress queue.
dellNetFpEgrQDroppedPacketsRate 1.3.6.1.4.1.6027.3.27.1.20.1.8 Rate of Packets dropped per Unicast/
Multicast Egress queue.
Simple Network Management Protocol (SNMP) 215