HP 6125G HP 6125G & 6125G/XG Blade Switches Layer 2 - LAN Switching Co - Page 90
Configuring No Agreement Check
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[DeviceA] stp config-digest-snooping # Enable Digest Snooping on GigabitEthernet 1/0/1 of Device B and enable global Digest Snooping on Device B. 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. Figure 19 Rapid state transition of an MSTP designated port 81
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