Qtech QSW-3200-28T [75/136] Mstp configuration list

+7(495) 797-3311www.qtech.ru

Москва, Новозаводская ул., 18, стр. 1

 All kinds of configuration parameter of STP

show spanning-tree interface

Use following command in any configuration mode to display STP status globally or on a port:

show spanning-tree interface

For example:

! Display STP configuration of e0/0/1

QTECH(config)#show spanning-tree interface ethernet 0/0/1

9.2.16 Enable/disable STP remote-loop-detect

When multi-layer cascading, if switch in media layer shut down STP, the BPDU packet sent by

upper switch will be cut by switch in media layer. When there is loop in the network below the

media layer, upper switch cannot detect the loop. Remote loop detect is the complementary for

this situation.

Enable STP remote-loop-detect

 In interface configuration mode

spanning-tree remote-loop-detect

 In global configuration mode

spanning-tree remote-loop-detect interface

Use no command to disable this function.

For example:

! Enable spanning-tree remote-loop-detect interface of Ethernet 0/1

QTECH(config)#spanning-tree remote-loop-detect interface ethernet 0/1

! Disable remote-loop-detect of Ethernet 0/1

QTECH(config-if-ethernet-0/1)#no spanning-tree remote-loop-detect

9.3 Brief introduction of MSTP

Multiple spanning tree (IEEE802.1S) is the update for SST (Single spaning tree,

IEEE8021.D/8021,W). SST can realize link redundant and eliminate loop, but all vlans share a

tree may cause the waste of effective bandwidth and the overload of some link and backup of

the rest. MST can supply the gap of above which can map different vlan to different spaning

tree example to realize all functions of SST and the balance of load, that is, different spaning

tree example can form different topology and data of different vlan can choose different

transmission channel according to the spaning tree example where the vlan locates.

9.4 MSTP configuration

9.4.1 MSTP configuration list

Each parameter configured by MSTP can be effective in MSTP mode when spanning tree is

enable. The configuration will be saved when MSTP is disable and it will be effective when

MSTP is enable. The configuration list is as following:

 Configure timer value of MSTP

 Configure MSTP configuration mark

 Configure MSTP net bridge privilege

 Configure edge interface status of MSTP interface

 Configure MSTP interface link type

 Configure MSTP interface path cost