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Table 7
Dual Link Connectivity Using Optical Bypass Modules (continued)
Port on Optical Bypass #1
D
CTRL
Deploying a Multigigabit Service Control Platform Topology
In a Multigigabit Service Control Platform (MGSCP) deployment, the cabling scheme depends on the number and arrangement
of ports in the EtherChannel in the Cisco 7600 series router. It is therefore not possible to detail exact cabling schemes. When
designing the cabling scheme, refer to the following general guidelines.
General guidelines for MGSCP topologies:
• Because two links exist per Cisco SCE 8000 platform, the minimum number of platforms required is half the number of
links used.
• Each link corresponds to one port on the EtherChannel (EC) on the Cisco 7600 series router. Each EC supports a maximum
of eight ports. Therefore, if all eight EC ports are configured, four Cisco SCE8000 platforms are required.
• For N+1 redundancy, two ports (connected to the standby platform) must be configured as standby ports on both ECs.
Therefore, for N+1 redundancy, one router and five Cisco SCE8000 platforms are used to support eight links.
• If two Cisco 7600 series routers are used (for network redundancy), one link on each Cisco SCE8000 platform is connected
to each router. This requires twice the number of Cisco SCE8000 platforms, one platform for each link.
A minimum of eight Cisco SCE8000 platforms are required to support eight ports.
–
For N+1 redundancy, nine Cisco SCE8000 platforms are used to support eight active links.
–
When cabling to the EC, follow these guidelines:
• The Cisco SCE platform ports must be connected to the EC ports in the same order on both sides.
• The EC ports should be sorted in an ascending order by their physical interface numbers.
• In a topology with two Cisco 7600 series routers, the order of connection to the EC ports must be the same on both routers.
For both routers to send the traffic of a given subscriber to the same SCE platform, the SCE platforms must be connected
to both routers in exactly the same order (one SCE platform connected to the first link on both routers, another
SCE platform connected to the second link on both routers, and so on).
Cabling 10 GBE Line Interface Ports
When you install an external optical bypass module, the Cisco SCE 8000 line ports are connected to the module. See
Note
Table 6
and
Table 7
Warning
Class 1 laser. Avoid exposure to radiation and do not stare into open aperture.
Step 1
Obtain the appropriate fiber optic cable.
Plus the fiber optic cable into the appropriate port on the 10 GBE interface on the SPA module in slot #3 of the
Step 2
Cisco SCE 8000
16
Connects to this...
SCE platform port 3/3/0
Right External Bypass port on SCE 8000-SCM-E module
for connectivity.
(Figure
10).