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Configuring Asymmetric Routing Topology
Asymmetric Routing and Other Service Control Capabilities
Asymmetric routing can be combined with most other Service Control capabilities, however there are
some exceptions.
Service Control capabilities that cannot be used in an asymmetric routing topology include the
following:
•
•
•
•
Enabling Asymmetric Routing
The asymmetric routing mode is disabled by default. It is typically enabled by the SCA-BB application
when applying an appropriate service configuration.
Note that the detection of uni-directional flows is done by the SCE platform regardless of the asymmetric
routing mode, but the appropriate configuration will assure that the uni-directional flows are properly
classified and controlled.
For more information, please see the Cisco Service Control Application for Broadband User Guide.
How to Monitor Asymmetric Routing
Use the command below to display the following information regarding asymmetric routing:
•
•
Step 1
From the SCE> prompt, type show interface linecard 0 asymmetric-routing-topology and press
Enter.
Displays the asymmetric routing information.
Cisco SCE 2000 and SCE 1000 Software Configuration Guide
7-8
Subscriber redirect
Subscriber notification
Any kind of subscriber integration, including MPLS VPN. (Use subscriber-less mode or anonymous
subscriber mode instead)
Classical open flow mode, including the following:
–
Flow-open-mode classical explicitly enabled (ROOT level configuration)
–
VAS traffic forwarding mode enabled
–
Analysis layer transport mode enabled (ROOT level configuration)
–
'no TCP bypass-establishment' mode enabled (ROOT level configuration)
A traffic rule is configured for certain flows to use the classical open flow mode (ROOT level
–
configuration)
Current status of asymmetric routing mode (enabled or disabled)
TCP unidirectional flows ratio: the ratio of TCP unidirectional flows to total TCP flows per traffic
processor, calculated over the period of time since the SCE platform was last reloaded (or since the
counters were last reset).
Chapter 7
Configuring the Connection
OL-7827-12
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