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VigorSwitch P2260 User’s Guide
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Admin Point To Point: We say a port is a point-to-point link, from RSTP’s view, if
it is in full-duplex mode but is shared link if it is in
half-duplex mode. RSTP fast convergence can only happen
on point-to-point links and on edge ports. This can expedite
the convergence because this will have the port fast transited
to forwarding state.
There are three parameters, Auto, True and False, used to
configure the type of the point-to-point link. If configure this
parameter to be Auto, it means RSTP will use the duplex
mode resulted from the auto-negotiation. In today’s switched
networks, most links are running in full-duplex mode. For
sure, the result may be half-duplex, in this case, the port will
not fast transit to Forwarding state. If it is set as True, the
port is treated as point-to-point link by RSTP and
unconditionally transited to Forwarding state. If it is set as
False, fast transition to Forwarding state will not happen on
this port.
Default: Auto
MCheck: Migration Check. It forces the port sending out an RSTP
BPDU instead of a legacy STP BPDU at the next
transmission. The only benefit of this operation is to make
the port quickly get back to act as an RSTP port. Click <M
Check> button to send a RSTP BPDU from the port you
specified.
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The Port Trunking Configuration is used to configure the settings of Link Aggregation.
You can bundle more than one port with the same speed, full duplex and the same MAC to
be a single logical port, thus the logical port aggregates the bandwidth of these ports. This
means you can apply your current Ethernet equipments to build the bandwidth aggregation.
For example, if there are three Fast Ethernet ports aggregated in a logical port, then this
logical port has bandwidth three times as high as a single Fast Ethernet port has.
The switch supports two kinds of port trunking methods:
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Ports using Link Aggregation Control Protocol (according to IEEE 802.3ad specification)
as their trunking method can choose their unique LACP GroupID (1~8) to form a logic
“trunked port”. The benefit of using LACP is that a port makes an agreement with its peer
port before it becomes a ready member of a “trunk group” (also called aggregator). LACP
is safer than the other trunking method - static trunk.
The switch LACP does not support the followings:
¾ Link Aggregation across switches
¾ Aggregation with non-IEEE 802.3 MAC link
¾ Operating in half-duplex mode
¾ Aggregate the ports with different data rates
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