Zte ZXA10 C300, Руководство по настройке

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Chapter 10
STP Configuration
The ZXA10 C300 supports the following three Spanning Tree Protocol ( STP ) modes:
l
Single Spanning Tree Protocol ( SSTP )
l Rapid Spanning Tree Protocol ( RSTP )
l
Multiple Spanning Tree Protocol ( MSTP )
SSTP Mode
SSTP complies with the IEEE 802.1d standard. It is compatible with STP, RSTP and MSTP.
The bridge in SSTP mode can interwork with the bridge in RSTP and MSTP modes.
RSTP Mode
RSTP complies with the IEEE 802.1w standard. RSTP provides faster convergence than
SSTP. When the network topology changes, the port state of the redundant switch port
can be quickly changed from Discard to Forward in a point-to-point connection condition.
MSTP Mode
MSTP complies with the IEEE 802.1s standard. MSTP is added with the concepts
of instance and VLAN mapping. SSTP and RSTP modes can be considered as a
special MSTP instance, in which case, the instance is 0. The MSTP mode provides fast
convergence and load balancing for VLAN.
In SSTP and RSTP modes, the VLAN concept does not exist, and each port has only one
state. Namely, the port has the same forwarding state in different VLANs.
In MSTP mode, multiple spanning-tree instances can exist, and a port has different
forwarding states in different VLANs. Multiple sub-tree instances can be generated in the
Multiple Spanning Tree ( MST ) region to realize load balancing.
MSTP is applied to the redundant network. MSTP can not only provide fast convergence
but also distribute flows of different VLANs to the respective paths, which provides a good
load sharing mechanism for redundant links.
Table of Contents
Configuring STP.......................................................................................................10-1
10.1 Configuring STP
The ZXA10 C300 supports MSTP and is compatible with SSTP and RSTP. It also supports
MSTP ring networking. By default, the ZXA10 C300 uses the MSTP mode. Any one of
10-1
SJ-20130520164529-007|2013-06-30 (R1.0) ZTE Proprietary and Confidential