Huawei Quidway S9300 Configuration Manual page 220

8 MSTP Configuration
The link type of the interface is set.
On a point-to-point (P2P) link, the designated port enters the forwarding state without delay
after one-way handshake with the downstream switch. The network convergence time is thus
shortened.
On a shared link connecting more than three switches, the downstream switch does not respond
to the handshake request sent by the designated port. The designated port must wait twice the
forward delay to enter the forwarding state. Compared with the P2P link, the shared link spends
longer time in network convergence.
By default, the designated port automatically checks whether it is connected to a P2P link.
Step 6 Run:
stp instance instance-id port priority priority
The priority of the interface in the specified spanning tree is set.
By default, the priority of an interface is 128.
Step 7 Run:
stp [ instance instance-id ] cost cost
The path cost of the port in the specified spanning tree is set.
By default, the path cost of an interface is calculated by MSTP.
Step 8 Run:
stp transmit-limit packet-number
The maximum number of BPDUs that the interface sends within the Hello time is set.
By default, the maximum number of BPDUs that an interface can send in a Hello time is 3.
Step 9 Run:
quit
Return to the system view.
Step 10 Run:
stp pathcost-standard { dot1d-1998 | dot1t | legacy }
The algorithm for calculating the path cost of the interface is specified.
By default, the algorithm defined in IEEE 802.1t is used to calculate the default value of the
path cost.
The switches on the same network must use the same algorithm to calculate the path cost of
interfaces.
Step 11 Run:
stp converge { fast | normal }
The STP convergence mode of the interface is set.
By default, the STP convergence mode of an interface is fast.
In fast mode, the interface deletes the related ARP entries directly after receiving a TC packet.
In normal mode, the interface waits until the aging time of the ARP entries expire instead of
directly deleting them after receiving a TC packet.
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Quidway S9300 Terabit Routing Switch
Configuration Guide - Ethernet
Issue 03 (2009-08-20)