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You can run the l2protocol-tunnel command to configure the S series switch to transparently transmit the Cisco proprietary BPDUs. The port on the Cisco switch sends Cisco proprietary BPDUs in VLANs other than VLAN 1, whereas the S series switch forwards the Cisco proprietary BPDUs as common multicast data packets. ? If the link type of the port is trunk and the port is removed from VLAN 1, the Cisco switch cannot interwork with the S series switch. L Whether a Cisco switch running PVST+ or Rapid PVST+ can interwork with a Huawei S series switch depends on the link type of the Cisco switch's port connected to the S series switch. Bridge protocol data units (BPDUs) of PVST+, Rapid PVST+, and MST use Cisco proprietary BPDU formats, which are different from the standard BPDU format defined by the Institute of Electrical and Electronics Engineers (IEEE).
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On Huawei S series switches, a port discards the BPDUs in such a scenario.Ĭisco switches support the following spanning tree protocols: Per VLAN Spanning Tree (PVST), PVST Plus (PVST+), Rapid PVST+, and Multiple Spanning Tree (MST). L On some legacy H3C switches, when STP is disabled globally or STP is enabled globally but disabled on a port, the port forwards received BPDUs as common multicast data packets in a VLAN. When an H3C switch connects to a Huawei S series switch, you are advised to specify the same standard to calculate the path costs. L H3C switches use its proprietary standard to calculate path costs by default, whereas Huawei S series switches use IEEE 802.1T standard to calculate path costs by default. L There are nearly no differences between STP commands on H3C switches and Huawei S series switches. In versions prior to V200R001, the system displays an error message when you configure root protection on such a port. L In V200R001 and later versions, if the stp edged-port enable command has been configured on a port, the port can be configured with root protection and loop protection. If a port does not receive BPDUs, the port becomes an edge port (the stp edged-port enable command configuration is not generated automatically). L In V200R001 and later versions, Huawei switches support automatic detection of edge ports. L Starting from V100R006, Huawei X7 switches have STP enabled by default. ? Huawei switches working in STP mode support BPDU protection, root protection, loop protection, and TC protection. ? Huawei switches have the same port roles when working in STP and RSTP modes: designated port, root port, alternate port, backup port, and edge port. You must manually change the working mode if the STP or RSTP mode is required. ? By default, Huawei switches work in MSTP mode. ? All versions and models of Huawei switches support STP. In this situation, users or services are distinguished by VLANs.Ģ. The spanning trees are independent of each other. Traffic in different VLANs is forwarded through different spanning trees for load balancing. Traffic in different VLANs is transmitted along different paths.
・ MSTP implements load balancing among VLANs. ・ MSTP achieves fast network convergence. ・ Multiple loop-free tree topologies are formed in an STP region to prevent broadcast storms while implementing link redundancy. ・ RSTP achieves fast network convergence. ・ A loop-free tree topology is formed in an STP region to prevent broadcast storms while implementing link redundancy.Īll VLANs share one spanning tree, and users or services do not need to be differentiated. STP refers to the Spanning Tree Protocol (STP) defined in IEEE 802.1D, the Rapid Spanning Tree Protocol (RSTP) defined in IEEE 802.1W, and the Multiple Spanning Tree Protocol (MSTP) defined in IEEE 802.1S. Like other protocols, STP is continuously upgraded with the development of networks. In addition, STP supports link redundancy.
Spanning Tree Protocol, a Layer 2 management protocol, selectively blocks redundant links to remove any Layer 2 loops on a network. All available bandwidth is consumed by the broadcast storm and therefore the valid packets cannot be transmitted on the network. If a loop occurs on a Layer 2 switching network, the packets will be transmitted infinitely, causing a broadcast storm. Please have a look below for more details on the topic. This post covers an example for configuring STP.
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