Enable/Disable Rstp On A Switch; Enable/Disable Rstp On A Port - 3Com 5500-SI Configuration Manual

Enable/Disable RSTP on
a Switch
Enable/Disable RSTP on
a Port
Table 595 RSTP Configuration (continued)
Device Configuration
Specify the
maximum
transmission
rate of STP
packets on a
port
Specify the
preference of a
port
Configure
whether to
connect a port
with a
peer-to-peer link
Specify the Path
Cost on a port
Specify the
standard to
follow in Path
Cost calculation
Configure
whether a port
can be an Edge
Port
Specify mCheck
for a port
Configure the
protection
functions on a
Switch
After the STP protocol is enabled, the modification of any parameter will result in the
re-calculation of the spanning tree on the Switch. It is therefore recommended to
configure all the RSTP parameters before enabling the STP feature on the Switch and
the port.
You can use the following command to enable RSTP on the Switch.
Perform the following configurations in System View.
Table 596 Enable/Disable RSTP on a Device
Operation
Enable/Disable RSTP on a device
Restore RSTP to the default value
Only after the RSTP is enabled on the Switch can other configurations take effect.
By default, RSTP is enabled.
You can use the following command to enable/disable the RSTP on the designated
port. To flexibly control the RSTP operations, after RSTP is enabled on the Ethernet
ports of the Switch, it can be disabled again to prevent the ports from participating in
the spanning tree calculation.
Default Value Note
No Ethernet pot can The more STP packets a port sends within
send more than 3 STP one Hello Time, the more resources are
packets within one consumed. It is therefore recommended to
Hello Time. limit the transmission rate of STP packets
on a port, preferably to the default value.
All Ethernet ports are The port preference plays an important role
at the preference in root port selection. You can make a port
128. to be root port by giving it a smallest
preference value.
RSTP can detect The two ports connected with a
automatically peer-to-peer link can rapidly transit to the
whether the current forwarding status by sending synchronous
Ethernet port is packets, eliminating unnecessary
connect to a forwarding delay.
peer-to-peer link.
The Switch gets the The path cost of a port is closely related to
path cost of a port the transmission rate of the link the port
from the link rate connected with. The larger the link rate is,
under the IEEE 802.1t the smaller the path cost shall be. It is
standard. recommended to use the default
configuration.
All Ethernet ports are For ports directly connected with terminals,
configured as please configure them as edge ports, and
non-edge ports. enable the BPDU protection function on
them.
- You can change the operational mode of a
port from STP-compatible to RSTP.
No protection It is recommended to enable the BPDU
function is enabled protection function on the Switches directly
on a Switch. connected with user PCs.
Command
stp { enable | disable }
undo stp
RSTP Configuration 547