Alcatel-Lucent OmniSwitch 6250 User Manual

Roles Within the Stack Managing OmniSwitch 6250 Stacks
page 7-10 OmniSwitch 6250 Hardware Users Guide September 2015
Secondary Management Module Selection
In order to provide effective management module redundancy, all OmniSwitch 6250 stacked configura-
tions dynamically assign a backup, or secondary, management module during the boot process. OmniS-
witch 6250 stacks use two different methods for selecting the secondary switch. These methods are:
• Stacking connection to the primary switch
• Saved slot number
Using the Stacking Connection to the Primary Switch
By default, the switch that is connected to the primary switch’s stacking port A is automatically assigned
the secondary management role. This applies to stacks on which there is no preassigned slot information—
i.e., there is no boot.slot.cfg file present in any switch.
For more information on using the stacking connection to the primary switch to determine the secondary
management module, refer to the diagram below:
Secondary Management Module Selection Using the Stacking Connection to the Primary Switch
Note. For information on dynamic slot numbering for idle elements within the stack, refer to “Idle Module
Role” on page 7-12 and “Slot Numbering” on page 7-20.
Four OmniSwitch 6250 switches are stacked
and connected via stacking cables, as shown.
All switches are currently powered off. None
of the switches have preassigned slot num-
bers—i.e., there are no
boot.slot.cfg files pres-
ent. The user powers on all switches in the
stack in close succession and the stack begins
the boot process.
By default, the switch connected to the
primary’s stacking port A is automatically
assigned the secondary management role.
The secondary switch is dynamically
assigned slot number 2.
1
2
3
When the elements in the stack come online,
the switch with the lowest MAC address is
given the primary management role and is
dynamically assigned slot number 1.
A B
A B
00:d0:95:b2:3c:8e
00:d0:95:b2:2a:ab
00:d0:95:b2:1c:ff
00:d0:95:b2:5b:8d
Idle
Idle
Primary
Secondary - Slot 2
(Primary - Slot 1)

Alcatel-Lucent OmniSwitch 6250 Specifications

General

Model	OmniSwitch 6250
Port Configuration	Fixed
Uplink Ports	4 x 10G SFP+
Operating System	AOS (Alcatel-Lucent Operating System)
Jumbo Frame Support	Yes
Product Type	Switch
Ports	48
Power over Ethernet (PoE)	Yes
Form Factor	Rack-mountable
Management	CLI, Web, SNMP
MAC Address Table Size	16, 000
Routing Protocol	OSPF, RIP, BGP
Power	AC
Power Supply	Dual redundant
Operating Temperature	0°C to 45°C
Operating Humidity	10% to 90% (non-condensing)