Specifications

Getting Started with HP ProCurve Switching and Routing
Module 5 – 144 Rev. 9.41
Considerations for VLANs
Defining options that affect convergence is only one aspect of configuring STP or
RSTP. You must also ensure that once you enable these protocols, your VLAN traffic
continues to be forwarded as needed between switches. Because these protocols do
not take VLANs into account when calculating best paths, blocking a redundant link
may isolate traffic from a particular VLAN/ That is, a switch may not be able to
forward traffic in a particular VLAN because its root port is not tagged for that
VLAN.
In this example, VLAN 30 is configured only on the ports that link switch B and
switch D. RSTP blocks this link as redundant, which isolates one VLAN 30 host from
the other.
For HP Internal Use Only