Spanning-Tree Operation
802.1s Multiple Spanning Tree Protocol (MSTP)
Operating Notes
SNMP MIB Support for MSTP. MSTP is a superset of the STP/802.1D and
RSTP/802.1w protocols and uses the MIB objects defined for these two
protocols. Also, as of December, 2003, there has been no formal MIB definition
published for 802.1s MSTP managed objects.
Troubleshooting
Duplicate packets on a VLAN, or packets not arriving on a LAN at all.
The allocation of VLANs to MSTIs may not be identical among all switches in
a region.
A Switch Intended To Operate Within a Region Does Not Receive
Traffic from Other Switches in the Region. An MSTP switch intended
for a particular region may not have the same configuration name or region
revision number as the other switches intended for the same region. The MSTP
Configuration Name and MSTP Configuration Revision number must be iden-
tical on all MSTP switches intended for the same region. Another possibility
is that the set of VLANs configured on the switch may not match the set of
VLANs configured on other switches in the intended region.
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