Lucent Technologies OptiStar EdgeSwitch, Руководство пользователя

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Planning and Ordering
365-575-925R1.5
Lucent Technologies
2 - 5
Issue 1, April 2002
The following two examples illustrate high availability strategies with different levels of redundancy.
Figure 2-3: High Availability Example #1- 1 OptiStar EdgeSwitch with Dual WAN and FCIP Network Modules
In High Availability Example #1, traffic is routed via the primary path from the SAN through a Fibre Channel
(FC) Fabric switch to an FCIP Network Module on the OptiStar EdgeSwitch. The traffic is then routed via a
WAN module on the OptiStar EdgeSwitch (an OC-12c Network Module in this example) to the WAN, and then
to an OptiStar EdgeSwitch with a similar configuration on the other side of the network. As long as the primary
path is healthy, the routing protocol will choose this path (since it has previously been assigned as the best
available path via the routing configuration parameters). In the meantime, each OptiStar EdgeSwitch has a
redundant FCIP Network Module and a redundant OC-12c Network Module, which enables a secondary route
through each OptiStar EdgeSwitch that is always active (in keepalive mode). In this scenario, if there is a
disruption or failure in the primary path, traffic will be rerouted to the secondary path in any of the following
points of failure:
•
the link between the FC Fabric Switch and the OptiStar EdgeSwitch
•
the link between the WAN and the OptiStar EdgeSwitch
•
any module within the OptiStar EdgeSwitch (including any individual components)
Figure 2-4: High Availability Example #2 - Dual OptiStar EdgeSwitches
In High Availability Example #2, traffic is routed from the SAN to an Fibre Channel (FC) Director. (
Note
: This
component in the example could also be a Fibre Channel Switch). The FC Director routes traffic via both
available paths to two separate OptiStar EdgeSwitches on each side of the network. The traffic is then routed
from the FCIP Network Modules on each OptiStar EdgeSwitch to the WAN via the WAN Network Module
(OC-12c Network Modules in this example). Since two active end-to-end paths are available for routing traffic,
there is complete protection from points of failure in the network between the FC Directors should any
disruption or failure occur. In this scenario, if there is a disruption or failure in the primary path, traffic will be
rerouted to the alternate path in any of the following points of failure:
•
the link between the FC Director and the OptiStar EdgeSwitch
•
the link between the WAN and the OptiStar EdgeSwitch
•
any module within the OptiStar EdgeSwitch (including any individual components)
•
the switch fabric of an OptiStar EdgeSwitch
OptiStar EdgeSwitch #1 OptiStar EdgeSwitch #2
SAN
1
3
2
4
FCIP OC-12c
FCIP OC-12c
1
3
2
4
FCIP OC-12c
FCIP OC-12c
WAN
FC
Fabric
Switch
FC
Fabric
Switch
SAN
1
3
2
4
FCIP
OC-12c
1
3
2
4
FCIP
OC-12c
1
3
2
4
OC-12c
FCIP
1
3
2
4
OC-12c
FCIP
OptiStar EdgeSwitch #1
OptiStar EdgeSwitch #2 OptiStar EdgeSwitch #4
OptiStar EdgeSwitch #3
WAN
WAN
SAN
SAN
FC
Director
FC
Director