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Raisecom
ISCOM2600G-HI (A) Series Configuration Guide
Step
1
2
2.7.7 Configuring interface priority and system priority
Whether the interface is elected as the root interface depends on interface priority. Under the
identical condition, the interface with smaller priority will be elected as the root interface. An
interface may have different priorities and play different roles in different instances.
The Bridge ID determines whether the ISCOM2600G-HI series switch can be elected as the
root of the spanning tree. Configuring smaller priority helps obtain smaller Bridge ID and
designate the ISCOM2600G-HI series switch as the root. If priorities of two ISCOM2600G-
HI series switch devices are identical, the ISCOM2600G-HI series switch with lower MAC
address will be elected as the root.
Similar to configuring root and backup root, priority is mutually independent in different
instances. You can confirm priority instance through the instance instance-id parameter.
Configure bridge priority for CIST if instance-id is 0 or the instance instance-id parameter is
omitted.
Configure the interface priority and system priority for the ISCOM2600G-HI series switch as
below.
Step
1
2
Command
Raisecom#config
Raisecom(config)#spanning-tree
instance-id
[ instance
{ primary | secondary }
You can confirm the effective instance of the root bridge or backup bridge through
the instance instance-id parameter. The current device will be assigned as the
root bridge or backup bridge of CIST if instance-id is 0 or the instance instance-id
parameter is omitted.
The roots in device instances are mutually independent; in other words, they
cannot only be the root bridge or backup bridge of one instance, but also the root
bridge or backup bridge of other spanning tree instances. However, in a spanning
tree instance, a device cannot be used as the root bridge and backup bridge
concurrently.
You cannot assign two or more root bridges for one spanning tree instance, but
can assign several backup bridges for one spanning tree. Generally, you had
better assign one root bridge and several backup bridges for a spanning tree.
Raisecom#config
Raisecom(config)#interface
interface-type interface-number
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Copyright © Raisecom Technology Co., Ltd.
] root
Command
Description
Enter global configuration mode.
Configure the ISCOM2600G-HI
series switch as the root bridge or
backup bridge of a STP instance.
Description
Enter global configuration mode.
Enter physical layer interface
configuration mode.
2 Ethernet
103
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