Zyxel IES-5112 [527/1156] Mst region

Zyxel IES-5106 [527/1156] Mst region
Chapter 14 Switch Screens
Management Switch Card User’s Guide
527
Figure 360 STP/RSTP Network Example
With MSTP, VLANs 1 and 2 are mapped to different spanning trees in the network. Thus traffic from
the two VLANs travel on different paths. The following figure shows the network example using
MSTP.
Figure 361 MSTP Network Example
14.11.2.2 MST Region
An MST region is a logical grouping of multiple network devices that appears as a single device to
the rest of the network. Each MSTP-enabled device can only belong to one MST region. When
BPDUs enter an MST region, external path cost (of paths outside this region) is increased by one.
Internal path cost (of paths within this region) is increased by one when BPDUs traverse the region.
Devices that belong to the same MST region are configured to have the same MSTP configuration
identification settings. These include the following parameters:
Name of the MST region
Revision level as the unique number for the MST region

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