Alcatel-Lucent 7450 Basic System Configuration Manual page 283

IOM cards that are not compatible with more recent 7450 ESS chassis modes will stay or be
put into an operationally down state.
The force keyword forces an upgrade either from mode a to mode b or d with cards
provisioned as iom-20g or from mode b to mode c with cards provisioned as iom-20g-b
(7750 SR).
On the 7750 SR, the ASAP MDA can only be configured if the IOM2-20g and IOM3-XP is
provisioned.
If you are in chassis-mode d and configure an IOM type as iom2-20g and then downgrade to
chassis-mode a or b (you must specify force keyword), a warning appears about the IOM
downgrade. In this case, the IOM`s provisioned type will downgrade to iom-20g-b. Once this
is done, the ASAP MDA cannot be configured. The following message appears:
*A:138.120.214.68>config>system# chassis-mode b
MINOR: CHMGR #1009 Mode change requires force - card-type iom2-20g in slot 1 would
change to iom-20g-b *A:138.120.214.68>config>system# chassis-mode b force
MINOR: CHMGR #1010 Can not change mode - mda m1-choc12-as-sfp in 10/1 not supported
when card changes to iom-20g-b
If this is the desired behavior, for example, chassis-mode d is configured and IPv6 is running,
you can then downgrade to chassis-mode a or b if you want to disable IPv6.
*A:ALA-48# show chassis
===============================================================================
Chassis Information
===============================================================================
Basic System Configuration Guide
• Chassis mode A corresponds to iom-20g, chassis mode backwards compatible for
iom-20g-b, iom2-20g, iom3-xp
• Chassis mode B corresponds to iom-20g-b, chassis mode backwards compatible for
iom2-20g, iom3-xp
• Chassis mode D corresponds to iom3-xp
Note: The iom-20g is not supported from 5.0R and later but chassis mode A is described
for backwards compatibility purposes.
Name
Type
Location
Coordinates
CLLI code
Number of slots
Number of ports
Critical LED state
Major LED state
Minor LED state
Over Temperature state
: ALA-48
: 7750 SR-12
: exit
: N 45 58 23, W 34 56 12
: abcdefg1234
: 12
: 246
: Off
: Off
: Off
: OK
System Management
283