Configuring No Agreement Check - HP A5830 Configuration Manual

Figure 19 Digest Snooping configuration
MST region
GE1/0/1
Device A
Configuration procedure
2.
# Enable Digest Snooping on GigabitEthernet 1/0/1 of Device A and enable global Digest Snooping on
Device A.
<DeviceA> system-view
[DeviceA] interface gigabitethernet 1/0/1
[DeviceA-GigabitEthernet1/0/1] stp config-digest-snooping
[DeviceA-GigabitEthernet1/0/1] quit
[DeviceA] stp config-digest-snooping
# Enable Digest Snooping on GigabitEthernet 1/0/1 of Device B and enable global Digest Snooping on
Device B.
<DeviceB> system-view
[DeviceB] interface gigabitethernet 1/0/1
[DeviceB-GigabitEthernet1/0/1] stp config-digest-snooping
[DeviceB-GigabitEthernet1/0/1] quit
[DeviceB] stp config-digest-snooping

Configuring No Agreement Check

In RSTP and MSTP, the following types of messages are used for rapid state transition on designated
ports:
Proposal—Sent by designated ports to request rapid transition

Agreement—Used to acknowledge rapid transition requests

Both RSTP and MSTP devices can perform rapid transition on a designated port only when the port
receives an agreement packet from the downstream device. RSTP and MSTP devices have the following
differences:
For MSTP, the root port of the downstream device sends an agreement packet only after it receives

an agreement packet from the upstream device.
For RSTP, the downstream device sends an agreement packet regardless of whether an agreement

packet from the upstream device is received.
Device C
(Root bridge)
GE1/0/1 GE1/0/2
GE1/0/2 GE1/0/2
Device B
Root port
Designated port
Blocked port
Normal link
GE1/0/1
Blocked link
80