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To enable up to five Stinger MRT systems to operate as a hosted system, complete the
following steps:
1
Cable the units together via the cascade ports.
2
Configure each remote shelf to operate in slave mode, then reset.
3
Configure the host unit to operate in master mode, then reset.
4
On the host system, enable each remote shelf.
5
Verify that the hosted system topology is correct.
6
Provision virtual circuits from remote LIMs.
Cabling Stinger MRT units together
As shown in Figure B-1, each Stinger MRT unit has a pair of STS-3 connectors,
labeled EXP1 and EXP2, used to cascade units. For details about cabling these ports, see
the appropriate section of the unit's Getting Started Guide.
Figure B-1also shows that remote shelves do not have trunk interfaces. Only the host
Stinger MRT provides connection and access to the network through its trunk
interfaces.
Figure B-1. Hosted MRT system
Stinger MRT #5
Stinger MRT #4
Caution
!
be a single path from a remote shelf to the host. Do not connect both cascade ports on
a remote shelf toward the host.
A hosted system can contain a mix of Stinger MRT model types. A remote shelf with
any valid shelf ID (from 2 to 7) can be connected in any order to either of the host's
cascade ports.
If a remote shelf is configured with an invalid shelf ID or a shelf ID that has been
assigned to another shelf, the remote shelf is not accepted into the hosted system
topology.
With a single path from a remote shelf to the host, failure of a single unit can cause
inaccessibility of downstream remote shelves. The host detects and reports remote
shelves that become unreachable due to failures.
Stinger® MRT Getting Started Guide
Stinger MRT #1
No trunk
EXP1 EXP2
No trunk
EXP1 EXP2
Path redundancy is not supported with this software version. There must
Hosted Operation of Cascaded Stinger MRT units
Configuring hosted MRT system operations
EXP1 EXP2
Stinger MRT #2
EXP1 EXP2
Stinger MRT #3
EXP1 EXP2
ATM Core
No trunk
No trunk
B-3
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