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VLAN Management
Page 9-6
Management VLANs
The IntraSwitch system supports access security for switch
management. By default, switch management is not affected by
its VLAN configuration, meaning the switch can be accessed in
any of the VLANs. Once management access is enabled for a
particular VLAN, called the management VLAN, the switch can
be managed only on interfaces belonging to the management
VLAN(s). This essentially means that the Telnet, HTTP and
SNMP operations for the switch will be successful only on
interfaces belonging to management VLAN. Management VLAN
security does not affect console management, though. See
"Configuring Management VLAN" for details on configuring the
management VLAN.
∆ Note: Management Access can be enabled for
more than one VLAN at a time. By default, Man-
agement Access is enabled for all VLANs.
▲ Important! When configuring VLAN manage-
ment in-band, if you disable management access
to your own VLAN, you will have to move to a
different VLAN port or to the console in order to
further configure the device.
Spanning Tree Protocol in VLAN environment
The IntraSwitch system supports single Spanning Tree Protocol
(STP) in the multi VLAN environment. STP operates the same
way as when the system has no VLAN configuration. As far as
STP BPDU (Bridge Protocol Data Unit) packets are concerned,
management does not worry about which VLAN the BPDU is
received or transmitted from. As a consequence, the data loop
involving ports belonging to multiple VLANs will be cut as one
or more ports involved in the data loop will be put in Block
state.
∆ Note: You cannot create switched links between
VLANs by patching two ports of the same
switch together. This will create an STP loop
which will disable one of the ports.
6216M Book Page 6 Wednesday, January 27, 1999 5:26 PM