Operation Manual – MSTP
Quidway S3900 Series Ethernet Switches-Release 1510 Chapter 1 MSTP Configuration
Huawei Technologies Proprietary
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1.5.7 BPDU Packets Drop Configuration
Table 1-35 BPDU packets drop configuration procedure
Operation Command Description
Enter system view
system
-
view
—
Enter Ethernet port
view
interface
interface-name
—
Enable the BPDU
packets drop
function in
Ethernet port view
bpdu-drop any
Required
# Enable the BPDU packets drop function on Ethernet1/0/1
<Quidway>system-view
[Quidway] interface Ethernet 1/0/1
[Quidway-Ethernet1/0/1] bpdu-drop any
1.6 Digest Snooping Configuration
1.6.1 Introduction
According to IEEE 802.1s, two interconnected MSTP switches can interwork with each
other through MSTIs in an MST region only when the two switches have the same MST
region-related configuration. Interconnected MSTP switches determine whether or not
they are in the same MST region by checking the configuration IDs of the BPDUs
between them. (A configuration ID contains information such as region ID and
configuration digest.)
As some partners' switches adopt proprietary spanning tree protocols, they cannot
interwork with other switches in an MST region even if they are configured with the
same MST region-related settings as other switches in the MST region.
This problem can be overcome by implementing the digest snooping feature. If a port
on a S3900 series switch is connected to a partner's switch that has the same MST
region-related configuration as its own but adopts a proprietary spanning tree protocol,
you can enable digest snooping on the port. Then the S3900 series switch regards the
partner's switch as in the same region; it records the configuration digests carried in the
BPDUs received from the partner's switch, and put them in the BPDUs to be send to the
partner's switch. In this way, the S3900 series switches can interwork with the partners'
switches in the same MST region.
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