User manual
15
wEb-bASED bROwSER MANAGEMENT
VLAN Aware: Either “Enabled” or “Disabled” (default). When enabled, the VLAN-
aware attribute will be enabled; when disabled, the VLAN-unaware attribute will
be enabled. The native operation mode for an IEEE 802.1Q-compliant switch is
VLAN-aware. Even if a specic network architecture doesn’t use VLANs, the
system default VLAN settings allow the switch to still operate in a VLAN-aware
mode while providing functionality required for almost any network application.
However, the IEEE 802.1Q standard denes a set of rules that must be followed
by all VLAN-aware switches. For example:
• Valid VID range is 1 to 4094 (VID=0 and VID=4095 are invalid)
• Each frame ingressing a VLAN-aware switch is associated with a valid VID
• Each frame egressing a VLAN-aware switch is either untagged or tagged with
a valid VID (which means priority-tagged frames with VID=0 are never sent
out by a VLAN-aware switch)
It turns out that some applications have requirements conicting with the IEEE
8202.1Q native mode of operation (e.g., some applications explicitly require
priority-tagged frames to be received by end devices). To ensure the required
operation in any possible application scenario and provide full compatibility with
legacy (VLAN-unaware) devices, the switch can be congured to work in a
VLAN-unaware mode. In that mode:
• Frames ingressing a VLAN-unaware switch are not associated with any VLAN
• Frames egressing a VLAN-unaware switch are sent out unmodied; i.e., in the
same untagged, 802.1Q-tagged format as they were received.
Ingress Filtering Enabled: Either “Enabled” or “Disabled” (default). When enabled,
checks whether the source port and this port are in the same VLAN, only allowing
the same VLAN members to forward packets. When disabled, it allows the
same PVID packets to receive.
Packet Type: Either “All” or “Tagged Only” (default: All). When selecting “Tagged
Only,” the port will only be allowed to receive the tagged frames. “All” allows all
packets to access this port.
PVID: Default: 1. Species the VLAN ID associated with untagged frames received
on this port. Frames tagged with a non-zero VLAN ID will always be associated
with the VLAN ID retrieved from the frame tag.
AGGREGATION
This screen allows you to aggregate several Ethernet ports into one logical link
(port trunk) with a higher bandwidth. Aggregation can be used for two purposes:
• To obtain increased, linearly incremental link bandwidth
• To improve network reliability by creating link redundancy. If one of the aggregated
links fails, the switch will balance the trafc between the remaining links.
To set up port trunk groups, put the selected ports’ numbers into the same trunk group.
You can congure up to eight groups. Click “Apply” to complete the conguration.