ELTEX ESR-21 - Configuration Example

ESR series service routers.ESR-Series. User manual
132
Step Description Command Keys
16 Set the path value determination
method.
esr(config-if-gi)# spanning-tree
cost
<COST> – path cost in the range
[1..20000000].
Default value: 4.
17 Allow this port to be set as root. esr(config-if-gi)# spanning-tree
guard root
18 Set the RSTP protocol to the
transmitting state and determine the
type of connection for the selected
port – 'point-to-point', 'branched'.
esr(config-if-gi)# spanning-tree
link-type {point-to-point|shared}
point-to-point – the command
defines the interface as 'point-to-
point';
shared –the command defines the
interface as 'shared'.
Default value: point-to-point.
19 Set interface priority in STP spanning
tree.
esr(config-if-gi)#spanning-tree
port-priority <PRIORITY>
<PRIORITY> –priority, specified in
the range with increments of 16
[0..240].
20 The mode is activated, in which the
port, when the link is up, immediately
switches to the transmitting state,
without waiting for the timer to expire.
esr(config-if-gi)# spanning-tree
portfast
8.7.2 Configuration example
Objective:
Configure STP on the router to prevent a loop with a 10 second listen and learn interval and a spanning tree
lifetime of 15 seconds.
Solution:
Example of a diagram with a router and a switch connected by two links is given below.
RSTP protocol on the ESR is enabled by defalut.
Go to the configuration mode:
esr-20# configure
The commands for configuring MSTP are only available on the ESR-1000 as the MSTP protocol is
currently supported solely on this device.
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