Command Line Interface Reference Guide HP BladeSystem PC Blade Switch

22-28 www.hp.com HP PC Blade Switch CLI Reference Guide
Spanning-Tree Commands
In the output below, VLAN 1 is a member of MST 1 and since switch ports e45 and e46 are static
members of VLAN 1, the output below for MST 1 indicates that e45 is forwarding to the root of
the STP domain and e46 is blocking and therefore the alternate path. VLAN 2 is a member of
MST 2 and since switch ports e43 and e44 are static members of VLAN 1, the output below for
MST 2 indicates that e43 is forwarding to the root of the STP domain and e44 is blocking and
therefore the alternate path. Note: Results may be somewhat different in your specific
environment. Just keep in mind that the purpose of the mstp-rstp feature is to isolate PVST
Instances. When connecting the HP PC Blade Switch to any standards based Spanning-Tree
infrastructure, this feature must be disabled and the switch must be reconfigured to interoperate
using the appropriate IEEE Standardized Spanning-Tree Protocol.
Example
The following commands display spanning-tree information.
Console# show spanning-tree active
Spanning tree enabled mode MSTP
Default port cost method: short
MSTP to RSTP conversion: Enabled
Gathering information ..........
###### MST 0 Vlans Mapped:
CST Root ID Priority 32768
Address 00:15:60:a0:e9:b0
This switch is root for CST and IST master
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Max hops 20
Name State Prio.Nbr Cost Sts Role PortFast Type
---- ------- -------- ----- --- ---- -------- ----------
e43 Enabled 128.43 4 Frw Desg No P2p Intr
e44 Enabled 128.44 4 Frw Desg No P2p Intr
e45 Enabled 128.45 4 Frw Desg No P2p Intr
e46 Enabled 128.46 4 Frw Gesg No P2p Intr
###### MST 1 Vlans Mapped: 1
Root
ID
Priority 24676
Address 00:17:59:9f:9f:80
Path Cost 4
Root Port e45
Rem hops 19