Prerequisites; Configuration Procedure; Configuration Example - 3Com MSR 50 Series Configuration Manual

478 C 23: MSTP C
HAPTER

Prerequisites

Configuration Procedure

n

Configuration Example

ONFIGURATION
upstream device and thus sends no agreement packets to the upstream device. As
a result, the designated port of the upstream device fails to transit rapidly and can
only change to the Forwarding state after a period twice the Forward Delay.
In this case, you can enable the No Agreement Check feature on the downstream
device's port to perform rapid state transition.
A device is the upstream one that is connected to another vendor's MSTP
■
supported device via a point-to-point link.
Configure the same region name, revision level and VLAN-to-instance
■
mappings on the two devices, making them in the same region.
Following these steps to configure No Agreement Check:
To do...
Enter system view
Enter Ethernet Enter Ethernet
interface view interface view
or port group
Enter port
view
group view
Enable No Agreement Check
The No Agreement Check feature can only take effect on the root port or
Alternate port after enabled.
Network requirements
Device A connects to a third-party's device that has a different MSTP
■
implementation. Both devices are in the same region.
The third-party's device is the regional root bridge, and device A is the
■
downstream device.
Network diagram
Figure 135 No Agreement Check configuration
Third-party device
Eth 1/1
Eth 1/0
Device A
Use the command...
system-view
interface interface-type
interface-number
port-group { manual
port-group-name |
aggregation agg-id }
stp no-agreement-check
Root port
Designated port
Remarks
-
User either command
Configured in Ethernet
interface view, the setting is
effective on the current port
only; configured in port
group view, the setting is
effective on all ports in the
port group.
Required
Not enabled by default