transfer is stopped and a serious error message is logged on the Release 5.3 master
unit. A manual download must be performed for both the diagnostic and agent
images.
- If the agent image on the added unit is Release 5.2 with the Release 5.2.0.1
diagnostic, then both images support DAUR and the Release 5.2 diagnostic supports
images greater than 6M. The new added unit does not join the stack. A diagnostic
update is first performed and then, because the agent images are different, an agent
update is performed and the switch reboots. The switch joins the stack after
reboot .
Note that an agent or diagnostic image update can be an upgrade or a downgrade. There is
no DAUR downgrade if the stack image is Release 5.0 or 5.1 (these images do not support
DAUR), but AAUR is performed.
• A stack with Release 5.1 or 5.0 software and the Release 5.1 or 5.0 diagnostic image
- If the agent image on the added unit is Release 5.2 with the Release 5.2.0.1 diagnostic
image, the new added unit does not join stack because the stack does not support DAUR.
A diagnostic upgrade or downgrade is not performed and, because agent images are
different, an agent downgrade is performed and the switch reboots. The switch joins the
stack after reboot .
The following table shows the expected behavior for various combinations of agent and
diagnostic images.
Stack master image
and diagnostic
version
Slave image
diagnostic
version
Expected behavior
Software 5.0/5.1
Diagnostic 5.0/5.1
Software 5.0/5.1
Diagnostic
5.0/5.1
Same image. Unit joins stack.
Software 5.0/5.1
Diagnostic 5.2
Same image. Unit joins stack.
Software 5.0/5.1
Diagnostic 5.2
Software 5.2
Diagnostic
5.0/5.1
AAUR is performed. AAUR downgrades the
unit image, and then reboots the unit. The unit
joins the stack after the reboot. No DAUR
performed as DAUR is unavailable on 5.0/5.1
Software 5.2
Diagnostic 5.2
Software
5.2_SSH/non SSH
Diagnostic 5.2
Software 5.0/5.1
Diagnostic
5.0/5.1
AAUR is performed. AAUR upgrades the unit
image, and then reboots the stack. DAUR
upgrades the diagnostic image then reboots
the unit. The unit joins the stack after the
reboot.
Software 5.0/5.1
Diagnostic 5.2
AAUR is performed. AAUR upgrades the unit
image, and then reboots the unit. The unit joins
the stack because the diagnostic images are
the same.
Troubleshooting tools
44 Troubleshooting Avaya ERS 4000 Series April 2014
Comments? infodev@avaya.com
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