User guide
September 2009
Page 72 of 79 OmniSwitch 6400/6850/6855/9000/9000E—Release 6.4.2.R01
138872 Unable to create ethernet oam association on an existing
domain using SNMP.
There is no known workaround at
this time.
139611 Trap generation for dot1agCfmFaultAlarm is inconsistent.
Trap is generated, but it is observed intermittently that traps
are generated after some time-gap.
There is no known workaround at
this time.
Spanning Tree
PR Description Workaround
95308 Temporary traffic loops could happen under the following
scenarios: 1. Reloading of a non root bridge. This happens
when the bridge is going down and is due to the sequential
bringing down of NIs during a reload process .It is purely
temporary in nature and stops when all the NIs eventually get
powered off. 2. NI power down When an NI power down
command is executed for an NI and if that NI has the Root
port port and other NIs have Alternate ports, it is possible to
see some traffic looping back from the newly elected Root
port. The traffic loop back is temporary and will stop once the
NI gets powered off. 3. New Root bridge selection Temporary
loops could occur during the process of electing a new Root
bridge, if this election process is triggered by the assignment a
worse priority for the existing root bridge or a root bridge
failure. This happens due to the inconsistent spanning tree
topology during the convergence and stops entirely once the
network converges
For items 1 and 2 above there is no
work around presently. For item 3
the following work around could be
applied: 1. Tune the max age (and or
max hops in the case of MSTP)
parameter to a lower value that is
optimal for the network. This will
reduce the convergence time and
thereby the duration of temporary
loops. 2. To select a new root bridge,
consider assigning better priority for
that bridge instead of assigning
worse priority for the existing root
bridge.
138461 On 6855-U24X, a mobile port with BPDU ignore configured
can sometimes get stuck in STP blocking state and will stop
sending or receiving packets.
Reset the port by changing the
configuration from mobile to fixed
and back to mobile.
138708 With BPDU switching enabled on an OS6855 platform, other
than OS6855-U24X, the CPU transmission can occasionaly
lock up preventing the CPU from enqueing packets to the
ports.
There is no known workaround at
this time.
VLAN Stacking
PR Description Workaround
118736
Giving a CVLAN range bigger than 128, a SAP with a SAP
profile sometimes displays an error and inconsistent state.
There is no known workaround at
this time.
132097
When assigning a sap-profile using the "bandwidth not-
assigned / priority not-assigned" to a SAP with an existing
sap-profile, the "bandwidth not-assigned" sap-profile may not
be functional.
There is no known workaround at
this time.
139380
When changing the bridge mode to flat on NNI ports, the
STP state of VLAN 1 must be enabled.
Ensure VLAN 1 STP state is enabled
when changing bridge mode to flat
on NNI port.