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Patch SB251-10 For SwitchBlade 4000 Series Switches and AT-9800 Series Switches 5
Patch SB251-10 for Software Release 2.5.1
C613-10361-00 REV J
Features in SB251-07
Patch file details are listed in Table 4:
Patch SB251-07 includes all issues resolved and enhancements released in
previous patches for Software Release 2.5.1, and the following enhancements:
With this enhancement:
• STP and Port Trunking now work together correctly.
• BDPU Forwarding is implemented. The BPDU Forwarding feature
configures the switch to forward all received STP BPDUs. Under
normal circumstances, the switch will not forward any received STP
BPDUs, even if STP is enabled.
This implementation is for standard STP, it does not guarantee that RSTP
and port trunking will work correctly together in all situations.
STP does not update the pathcost for trunked ports, which means that a
trunk group has the same pathcost as a single port. This may cause STP
Blocking where it is not expected. To overcome this, the user should
explicitly set the pathcost for the trunk group ports to be less than the
default value for a single port.
STP reconfigures if the Master port in a trunk group goes link down. If the
Master port in a trunk group goes link down, and a Non-Master port is still
link-up, then STP will go through the Listening>Learning>Forwarding
reconfiguration on the new Master port. This means that there will be a
switching outage on the trunk group whilst the new Master port transitions
to the Forwarding state.
Command handler changes:
• The PORT parameter of the CREATE SWITCH TRUNK PORT and ADD
SWITCH TRUNK PORT commands must specify ports that have
identical STP port configurations.
• The ENABLE STP and ENABLE STP PORT commands cannot be used
to enable STP operation on a port that has been disabled from STP
operation because of Port Trunking. Only the Master port in a trunk
group actively participates in the STP algorithm. Non-Master ports in
the trunk group are in the STP Disabled State.
• The output for the SHOW STP PORT command has been modifed so
that Non-Master Ports in a trunk group do not take part in the STP
algorithm.
• The output for the SHOW STP PORT command has been modified so
that it displays whether a user has set the PATHCOST value, or if it was
auto-configured.
Table 4: Patch file details for Patch SB251-07.
Base Software Release File
sb-251.rez
Patch Release Date
22-Apr-2003
Compressed Patch File Name
sb251-07.paz
Compressed Patch File Size
86524 bytes
PCR: 03399 Module: STP, SWI Level: 1