Monitoring your VLAN
VLANs can be used to contain broadcast traffic, act as a load balancing tool, and enhance data security, but there are some maintenance and troubleshooting challenges. Observer makes it easy to see a breakdown of total traffic (or each station’s traffic) by VLANs.
 
Being able to see VLAN information within the context of other metrics makes it much easier to separate VLAN configuration problems from general network problems, and thus keep your network running smoothly.
The VLAN Summary tab lets you focus on VLAN-level statistics by omitting station-level statistics. For example, you can quickly determine if traffic levels on your VLAN have become extraordinarily high and it allows you to assess your overall network performance health.
VLAN Stations shows what stations comprise each VLAN, what VLAN(s) a station belongs to, and traffic totals by station or by VLAN. You can think of it as a “top talkers” for VLANs.
If you want to limit packet captures to particular VLANs (or to exclude particular VLANs), you may filter by VLAN header fields for 802.1Q and ISL VLANs when troubleshooting a network on which VLANs are implemented.
Knowing which VLAN has been assigned to a switch port can be indispensable in troubleshooting connection problems. Although you could theoretically keep up-to-date records of VLAN port assignments, in the real world no one ever has time for this housekeeping task. You could also look up the information through the switch’s administrative interface when necessary, but it is much more convenient to have this information available directly from your analyzer. Using an SNMP form query, you can query your switch for VLAN port assignments.