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Cisco SCE 8000 10GBE Software Configuration Guide
OL-30621-02
Chapter 13 Managing the SCMP
About SCMP
This scenario is similar to the previous one, with ISG running on a service gateway or BRAS terminating
a large number of subscribers, however a second Cisco SCE platform has been added to provide
redundancy. This redundancy scheme assumes that Cisco SCE platforms are connected in a cascade,
with one active Cisco SCE platform and one backup.
Please note the following:
•
When cascaded Cisco SCE platforms are connected to one or more ISG devices, only the active
Cisco SCE platform maintains a connection to the ISG devices.
•
You can configure the cascaded Cisco SCE platforms to receive session info from the SCMP peer
on session creation or pull the session info when the subscribers traffic traverses the Cisco SCE
platform.
•
An ISG device cannot push sessions to two Cisco SCE platforms at the same time
Multiple ISG Routers with Two Cascaded Cisco SCE Platforms (NxISG – 2xCisco SCE)
illustrates a deployment using multiple ISG routers with two cascaded Cisco SCE platforms.
Figure 13-3
Multiple ISG Routers with Two Cascaded Cisco SCE Platforms
Many SPs require an edge platform with MPLS functionality to support L2 and L3 VPN services for
business customers, with the possibility of running subscriber management functions for residential and
business subscribers terminating on the same platform. If advanced services requiring deep packet
inspection are offered, we recommend locating the Cisco SCE platforms centrally, just before traffic
requiring such services exits the SP network, since not all traffic needs to be processed by Cisco SCE
platforms. Please note the following:
•
When cascaded Cisco SCE platforms are connected to one or more ISG devices, only the active
Cisco SCE platform maintains a connection to the ISG devices.
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Internet
IP/MPLS
core
P Node
DBL
ETTH/
ETTB
PE Node
+ ISG
PE Node
+ ISG
SCEs
Billing
Portal
Subcarrier
database
Address
mgmt