Reference Guide
Simple Network Management Protocol (SNMP) | 843
The table that the Dell Networking system sends in response to the snmpget request is a table that contains
hexadecimal (hex) pairs, each pair representing a group of eight ports.
• On the S5000, 7 hex pairs represents a stack unit. Seven pairs accommodates the greatest number of
ports available–64 ports on the S5000. On the S5000, the last stack unit begins on the 66th bit.
The first hex pair, 00 in Figure 47-19, represents ports 1-7 in Stack Unit 0. The next pair to the right
represents ports 8-15. To resolve the hex pair into a representation of the individual ports, convert the hex
pair to binary. Consider the first hex pair 00, which resolves to 0000 0000 in binary:
• On the S5000, each position in the 8-character string is for one port, starting with Port 1 at the left end
of the string, and ending with Port 8 at the right end. A 0 indicates that the port is not a member of the
VLAN; a 1 indicates VLAN membership.
Figure 47-19 shows the output for the S5000. All hex pairs are 00, indicating that no ports are assigned to
VLAN 10. In Figure 47-20, Port 0/2 is added to VLAN 10 as untagged. And the first hex pair changes
from 00 to 04.
Figure 47-20. Displaying Ports in a VLAN using SNMP
The value 40 is in the first set of 7 hex pairs, indicating that these ports are in Stack Unit 0. The hex value
40 is 0100 0000 in binary. As described above, the left-most position in the string represents Port 1. The
next position from the left represents Port 2 and has a value of 1, indicating that Port 0/2 is in VLAN 10.
The remaining positions are 0, so those ports are not in the VLAN.
Note that the table contains none of the other information provided by the command, such as port speed or
whether the ports are tagged or untagged.
[Dell system output]
R5(conf)#do show vlan id 10
Codes: * - Default VLAN, G - GVRP VLANs
Q: U - Untagged, T - Tagged
x - Dot1x untagged, X - Dot1x tagged
G - GVRP tagged, M - Vlan-stack
NUM Status Description Q Ports
10 Inactive U Te 0/2
[Unix system output]
> snmpget -v2c -c mycommunity 10.11.131.185 .1.3.6.1.2.1.17.7.1.4.3.1.2.1107787786
SNMPv2-SMI::mib-2.17.7.1.4.3.1.2.1107787786 = Hex-STRING: 40 00 00 00 00 00 00 00 00 00 00