Configuration Restrictions And Guidelines; Configuration Procedure; Digest Snooping Configuration Example - HP 3100 Series Configuration Manual

To enable communication between an HPE device and a third-party device, enable the Digest
Snooping feature on the port that connects the HPE device to the third-party device in the same MST
region.

Configuration restrictions and guidelines

•
Before you enable Digest Snooping, make sure that associated devices of different vendors are
connected and run spanning tree protocols.
•
With digest snooping enabled, in-the-same-region verification does not require comparison of
configuration digest, so the VLAN-to-instance mappings must be the same on associated ports.
•
With global Digest Snooping enabled, modification of VLAN-to-instance mappings and removal
of the current region configuration via the undo stp region-configuration command are not
allowed. You can modify only the region name and revision level.
•
To make Digest Snooping take effect, you must enable it both globally and on associated ports.
To make the configuration effective on all configured ports and while reducing impact on the
network, enable Digest Snooping on all associated ports first and then globally.
•
To prevent loops, do not enable Digest Snooping on MST region edge ports.
•
Hewlett Packard Enterprise recommends you to enable Digest Snooping first and then the
spanning tree feature. To avoid causing traffic interruption, do not configure Digest Snooping
when the network is already working well.

Configuration procedure

You can enable Digest Snooping only on the HPE device that is connected to a third-party device
that uses its private key to calculate the configuration digest.
To configure Digest Snooping:
Step
Enter system view.
1.
Enter interface view or port
2.
group view.
Enable Digest Snooping on
3.
the interface or port group.
Return to system view.
4.
Enable global Digest
5.
Snooping.

Digest Snooping configuration example

Network requirements
As shown in
these devices are in the same region.
Figure 19, Device A and Device B connect to Device C, which is a third-party device. All
Command
system-view
•
Enter Layer 2 Ethernet interface
view or Layer 2 aggregate
interface view:
interface interface-type
interface-number
•
Enter port group view:
port-group manual
port-group-name
stp config-digest-snooping
quit
stp config-digest-snooping
80
Remarks
N/A
Use either command.
Disabled by default.
N/A
Disabled by default.