User guide

Open Problem Reports and Feature Exceptions
page 64 OmniSwitch 6600/7000/8800—Release 5.1.5.R04
PR 64668
Spanning Tree may bounce because there are too many Spanning Tree instances attached to the port on the
OS7000.
Workaround: If more than 256 VLANs require a Spanning Tree, the switch must be configured in flat
mode (Spanning tree per VLAN is inactivated).
PR 65465
Changing any Spanning Tree parameter on a port for VLAN 1, when VLAN 1 is tagged for that port, is
not applied during the execution of the initial configuration file (boot.cfg) on the OS7000/8800.
Workaround: Do not use VLAN 1 as a 'tagged' VLAN.
PR 66521
If a local OS7000 port is configured to use 802.1W and a remote OS7000 port is configured to use
802.1D, then migrate times on the local port prevents the use of 802.1D bpdu and a loop is created for 2
seconds.
Workaround: There is no known workaround at this time.
PR 67917
Sometimes, a Listening/Learning state can be observed during a spanning tree topology change (change of
the Root port) on the OS7000/8800.
Workaround: There is no known workaround at this time.
PR 68476
The mirroring port is blocked by the spanning tree after the module hot swapping procedure on an
OS6624/6648.
Workaround: There is no known workaround at this time.
PR 74365
If a port on an OS7000 or OS6600 is connected to another port that is Blocked/Alternate, then this port
might not receive any BPDU from the Blocked port in order to figure out the 'Next Best Root' port. So the
show spantree x command for this switch will not show the 'Next Best Root' port. (Note that this informa-
tion is provided to be compatible with the XOS products and is not needed to compute spanning tree topol-
ogy)
Workaround: Try disconnecting/reconnecting the link so BPDUs may be exchanged through these ports.