HP VPN Firewall Appliances Network Management Configuration Guide
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Figure 54 Network diagram
2. Configuration procedure
# Enable digest snooping on GigabitEthernet 0/1 of Firewall A and enable global digest
snooping on Firewall A.
<FirewallA> system-view
[FirewallA] interface gigabitethernet 0/1
[FirewallA-GigabitEthernet0/1] stp config-digest-snooping
[FirewallA-GigabitEthernet0/1] quit
[FirewallA] stp config-digest-snooping
# Enable digest snooping on GigabitEthernet 0/1 of Firewall B and enable global digest
snooping on Firewall B.
<FirewallB> system-view
[FirewallB] interface gigabitethernet 0/1
[FirewallB-GigabitEthernet0/1] stp config-digest-snooping
[FirewallB-GigabitEthernet0/1] quit
[FirewallB] 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 is received from the upstream device.