Concept Guide

LineSpeed auto
ARP type: ARPA, ARP Timeout 04:00:00
To display the ports in a VLAN, send an snmpget request for the object dot1qStaticEgressPorts using the interface index as the instance
number, as shown for an S-Series.
The following example shows viewing VLAN ports using SNMP with no ports assigned.
> 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:
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
The table that the Dell EMC 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.
• Seven hex pairs represent a stack unit. Seven pairs accommodate the greatest number of ports available — 64 ports on the device.
The last stack unit begins on the 66th bit.
The rst hex pair, 00 in the previous example, represents ports 1 to 7 in Stack Unit 1. The next pair to the right represents ports 8 to 15. To
resolve the hex pair into a representation of the individual ports, convert the hex pair to binary. Consider the rst hex pair 00, which
resolves to 0000 0000 in binary:
• 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.
All hex pairs are 00, indicating that no ports are assigned to VLAN 10. In the following example, Port 0/2 is added to VLAN 10 as untagged;
the rst hex pair changes from 00 to 04.
The following example shows viewing VLAN ports using SNMP with ports assigned.
[Dell EMC Networking OS 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 Gi 1/2
[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
The value 40 is in the rst set of 7 hex pairs, indicating that these ports are in Stack Unit 1. The hex value 40 is 0100 0000 in binary. As
described, 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 1/2 is in VLAN 10. The remaining positions are 0, so those ports are not in the VLAN.
NOTE
: The table contains none of the other information the command provides, such as port speed or whether the ports are
tagged or untagged.
Add Tagged and Untagged Ports to a VLAN
The value dot1qVlanStaticEgressPorts object is an array of all VLAN members.
The dot1qVlanStaticUntaggedPorts object is an array of only untagged VLAN members. All VLAN members that are not in
dot1qVlanStaticUntaggedPorts are tagged.
Simple Network Management Protocol (SNMP)
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