Quick Reference Guide
PowerConnect B-Series TI24X Configuration Guide 139
53-1002269-02
Configuring STP related features
6
Set the admin-pt2pt-mac to enabled or disabled. If set to enabled, then a port is connected to
another port through a point-to-point link. The point-to-point link increases the speed of
convergence. This parameter, however, does not auto-detect whether or not the link is a physical
point-to-point link.
The force-migration-check parameter forces the specified port to sent one RST BPDU. If only STP
BPDUs are received in response to the sent RST BPDU, then the port will go return to sending STP
BPDUs.
Example
Suppose you want to enable 802.1W on a system with no active port-based VLANs and change the
hello-time from the default value of 2 to 8 seconds. Additionally, suppose you want to change the
path and priority costs for port 5 only. To do so, enter the following commands.
PowerConnect(config)#spanning-tree 802-1w hello-time 8
PowerConnect(config)#spanning-tree 802-1w ethernet 5 path-cost 15 priority 64
Displaying information about 802-1W
To display a summary of 802-1W, use the following command.
Syntax: show 802-1w [vlan <vlan-id>]
The vlan <vlan-id> parameter displays 802.1W information for the specified port-based VLAN.
The show 802.1w command shows the information listed in Table 27.
TABLE 27 CLI display of 802.1W summary
This field... Displays...
VLAN ID The port-based VLAN that owns the STP instance. VLAN 1 is the default
VLAN. If you have not configured port-based VLANs on this device, all
802.1W information is for VLAN 1.
PowerConnect#show 802-1w
--- VLAN 1 [ STP Instance owned by VLAN 1 ] ----------------------------
VLAN 1 BPDU cam_index is 2 and the IGC and DMA master Are(HEX) 0 1 2 3
Bridge IEEE 802.1W Parameters:
Bridge Bridge Bridge Bridge Force tx
Identifier MaxAge Hello FwdDly Version Hold
hex sec sec sec cnt
800000e080541700 20 2 15 Default 3
RootBridge RootPath DesignatedBri- Root Max Fwd Hel
Identifier Cost dge Identifier Port Age Dly lo
hex hex sec sec sec
800000e0804c9c00 200000 800000e0804c9c00 1 20 15 2
Port IEEE 802.1W Parameters:
<--- Config Params -->|<-------------- Current state ----------------->
Port Pri PortPath P2P Edge Role State Designa- Designated
Num Cost Mac Port ted cost bridge
1 128 200000 F F ROOT FORWARDING 0 800000e0804c9c00
2 128 200000 F F DESIGNATED FORWARDING 200000 800000e080541700
3 128 200000 F F DESIGNATED FORWARDING 200000 800000e080541700
4 128 200000 F F BACKUP DISCARDING 200000 800000e080541700