Simple Network Management Protocol (SNMP) | 871
• the next 1 bit is unused
For example, the index 72925242 is 100010110001100000000111010 in binary. The binary interface index
for GigabitEthernet 1/21 of a 48-port 10/100/1000Base-T line card with RJ-45 interface is shown in
Figure 42-27. 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.
Figure 42-27. Binary Representation of Interface Index
For interface indexing, slot and port numbering begins with the binary one. If the Dell Force10 system
begins slot and port numbering from 0, then the binary 1 represents slot and port 0. For example, the index
number in Figure 42-27 gives the binary 2 for the slot number, though interface GigabitEthernet 1/21
belongs to Slot 1. This is because the port for this example is on an E-Series which begins numbering slots
from 0. You must subtract 1 from the slot number 2, which yields 1, the correct slot number for interface 1/
21.
Note that the interface index does not change if the interface reloads or fails over. On the S-Series, if the
unit is renumbered (for any reason) the interface index will change during a reload.
View System Image
Use the chSysSwInPartitionAImgVers object to view the system image on Flash Partition A or use the
chSysSwInPartitionBImgVers object to view the system image on Flash Partition B.
The system image can also be retrieved by performing an SNMP walk on the following OID:
Table 42-7. 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
MIB Object OID
chSysSwModuleTable 1.3.6.1.4.1.6027.3.10.1.2.8
10 0010110 0011 00000000111010
Card
Type
Interface
Type
Port
Number
Slot
Number
14 bits
4 bits
7 bits2 bits
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