Alcatel-Lucent OmniSwitch 6400 Series User Manual

Stack Redundancy and Failover Managing OmniSwitch 6400 Series Stacks
page 6-16 OmniSwitch 6400 Series Hardware Users Guide August 2008
Stack Redundancy and Failover
Important. For a stacked configuration to have effective redundancy, a redundant stacking cable must be
installed between the upper-most and bottom-most switch in the chassis at all times.
The figure below shows how the redundant connection between the top and bottom switches in the stack
ensures that data will continue to flow throughout the stack, even in the event of a connection failure at
one of the stacking cables.
Stacking Cable Redundancy: Recovery Following a Stacking Link Failure
Data enters slot 1 via a 10/100/1000 Ethernet port. The
data is passed to slot 2 over the stacking cable connection,
then exits slot 2 via one of its 10/100/1000 Ethernet.
1
2
The stacking connection between slots 1 and 2 goes
down unexpectedly. Data can no longer travel directly
between slot 1 and 2.
However, because there is a redundant connection (the
cable between slot 1 and slot 4), data is immediately
passed to slot 4, then quickly traverses slot 3 and exits
slot 2 to its destination.
Slot 1
Slot 2
Slot 3
Slot 4
Chassis FrontStacking Cables
Slot 1
Slot 2
Slot 3
Slot 4

Alcatel-Lucent OmniSwitch 6400 Series Specifications

General

Model	OmniSwitch 6400 Series
Layer	Layer 2/3
Switching Capacity	Up to 128 Gbps
Forwarding Rate	Up to 95.2 Mpps
VLAN Support	Yes
IPv6 Support	Yes
Ports	10/100/1000
Power over Ethernet (PoE)	Yes, PoE/PoE+ support
Management	CLI, Web, SNMP
Form Factor	1U rack-mountable
VLANs	4096
MAC Address Table Size	Up to 32, 000
Power Supply	Redundant power supply option
Security Features	ACLs, 802.1X
Quality of Service (QoS)	Yes
Stacking	Yes