D-Link DGS-3212SR Инструкция по эксплуатации онлайн [93/224] 40542
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D-Link DGS-3212SR Инструкция по эксплуатации онлайн [93/224] 40542

D-Link DGS-3212SR Инструкция по эксплуатации онлайн [93/224] 40542
DGS-3212SR Stackable Gigabit Layer 2 Switch
the connection to the network for the group. Redundant links will be blocked, just as redundant links are blocked on the
Switch level.
The STP on the Switch level blocks redundant links between switches (and similar network devices). The port level STP
will block redundant links within an STP Group.
It is advisable to define an STP Group to correspond to a VLAN group of ports.
The following fields can be set:
Parameter Description
Unit
Choose the Switch ID number of the Switch in the Switch stack to be modified.
From/To
A consecutive group of ports may be configured starting with the selected port.
External Cost (0 =
Auto)
This defines a metric that indicates the relative cost of forwarding packets to the
specified port list. Port cost can be set automatically or as a metric value. The default
value is 0 (auto).
•
•
0 (auto) - Setting 0 for the external cost will automatically set the speed for
forwarding packets to the specified port(s) in the list for optimal efficiency.
Default port cost: 100Mbps port = 200000. Gigabit port = 20000.
value 1-200000000 - Define a value between 1 and 200000000 to determine
the external cost. The lower the number, the greater the probability the port
will be chosen to forward packets.
Hello Time
The time interval between the transmission of configuration messages by the des-
ignated port, to other devices on the bridged LAN, thus stating that the Switch is still
functioning. The user may choose a time between 1 and 10 seconds. The default is 2
seconds. This field is only operable when the Switch is enabled for MSTP.
Migrate
Setting this parameter as yes will set the ports to send out BDPU packets to other
bridges, requesting information on their STP setting If the Switch is configured for
RSTP, the port will be capable to migrate from 802.1d STP to 802.1w RSTP. If the
Switch is configured for MSTP, the port is capable of migrating from 802.1d STP to
802.1s MSTP. RSTP and MSTP can coexist with standard STP, however the benefits
of RSTP and MSTP are not realized on a port where an 802.1d network connects to
an 802.1w or 802.1s enabled network. Migration should be set as yes on ports
connected to network stations or segments that are capable of being upgraded to
802.1w RSTP or 802.1s MSTP on all or some portion of the segment.
Edge
Choosing the true parameter designates the port as an edge port. Edge ports cannot
create loops, however an edge port can lose edge port status if a topology change
creates a potential for a loop. An edge port normally should not receive BPDU
packets. If a BPDU packet is received, it automatically loses edge port status.
Choosing the false parameter indicates that the port does not have edge port status.
P2P
Choosing the True parameter indicates a point-to-point (P2P) shared link. P2P ports
are similar to edge ports, however they are restricted in that a P2P port must operate
in full duplex. Like edge ports, P2P ports transition to a forwarding state rapidly thus
benefiting from RSTP. A p2p value of false indicates that the port cannot have p2p
status. Auto allows the port to have p2p status whenever possible and operate as if
the p2p status were true. If the port cannot maintain this status, (for example if the
port is forced to half-duplex operation) the p2p status changes to operate as if the p2p
value were False. The default setting for this parameter is True.
State
This drop-down menu allows you to enable or disable STP for the selected group of
ports. The default is Enabled.
Click Apply to implement changes made.
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