Multiple Isg Routers With Multiple Sce Platforms Via Load Balancing (Nxisg - Mxsce); Scmp Peer Devices - Cisco SCE8000 Configuration Manual

About SCMP
Multiple ISG Routers with Multiple SCE Platforms via Load Balancing (NxISG – MxSCE)
The following diagram illustrates a deployment using multiple ISG routers with multiple SCE platforms
via load balancing. This is the scenario required for a MGSCP deployment.
Figure 11-2
Mega Pop
EX-1
(GSR)
(GSR/7500)
This scenario includes several SCE platforms connected to a Cisco 7600 router. For efficient control of
subscriber flows, the same SCE platform must process both directions of each subscriber flow, since the
SCE platform keeps the subscriber context. The Cisco 7600 router to which the SCE platforms are
connected acts as a dispatching element, distributing subscriber flows between SCE platforms and
guaranteeing that all flows of a specific subscriber will pass through the same SCE platform.
This scenario assumes that one (or sometimes more) of the devices in the cluster is redundant.
Note •
•

SCMP Peer Devices

An SCMP peer device is a Cisco device running IOS with the ISG module enabled. The SCE platform
supports the ability to communicate with several SCMP peer devices at the same time. However, each
peer device manages its own subscribers and the corresponding subscriber network IDs. The SCE
platform recognizes which subscribers belong to which peer device. There are two mechanisms that
accomplish this:
•
Cisco SCE8000 Software Configuration Guide, Rel 3.1.6S
11-4
Multiple ISG Routers with Multiple SCE Platforms via Load Balancing
BB-1
(GSR)
OC-192
Core-1
OC-192
(GSR)
OC-48
POS
BB-2
(GSR)
SBC-IS Mini Pop
DB-1
DB-2
(GSR/7500)
DIST-2
DIST-1
(6500)
(6500)
PE-1 BRAS DED-1
(GSR) (GSR/7500)
An ISG device cannot push sessions to two SCE platforms at the same time.
You must configure multiple SCE platforms with load-balancing (MGSCP) to work in pull
integration mode.
Login operation
Each SCMP peer device is assigned a unique ID called the Manager-Id. This ID is attached to each
subscriber from the moment it is created in the subscriber database, based on the SCMP peer that
logged-in the subscriber.
SBC IS core network
Core-1
(GSR)
OC-48
Core-2(GSR)
POS
OC-192
Core-3
(GSR)
SBC-IS Mini Pop
DB-1
(GSR/7500)
DIST-1
(6500)
SCE
PE-1 BRAS
(GSR)
Chapter 11 Managing the SCMP
BB-2
(GSR)
PE-1
(GSR)
BB-1
OC-48
(GSR)
POS
DB-2
(GSR/7500)
DIST-2
(6500)
SCE
DED-1
(GSR/7500)
OL-16479-01