Although you can always configure a feature, if the feature is not supported by the active feature profile, you
cannot use it.
There are two feature profiles available on your router:
•
The default profile that supports all Cisco IOS XR software features except for IEEE 802.1ah provider
backbone bridge (PBB).
•
The Layer 2 profile that supports all Cisco IOS XR software features including IEEE 802.1ah PBB, but
does not support IPv6, reverse-path forwarding (RPF) or netflow.
If the feature profile that you have configured on your router does not support a feature that you have configured,
warning messages are displayed on the console, and the feature does not work. A configured feature profile
takes affect only after you reload all the line cards on the router.
Relationship Between Scale and Feature Profiles
Although you are not limited in your selection of scale and feature profiles in relation to each other, Cisco
recommends using the scale and feature profiles together as indicated here:
Table 3: Interaction between Scale and Feature Profiles
Layer 2 Feature ProfileDefault Feature Profile
PPB
2
Up to 512 K Layer 3 CEF
1
scaleDefault Scale Profile
Not recommendedUp to 1.0 M Layer 3 CEF scale
Less than 128 K MAC entries
Layer 3 Scale Profile
Not recommendedUp to 1.3 M Layer 3 CEF scaleLayer 3 XL Scale Profile
1
Cisco Express Forwarding
2
provider backbone bridge
Other pairs are not recommended. Note that the Layer 3 XL scale profile does not support video monitoring.
How to Configure Profiles
Configuring the Scale Profile
Before you deploy your router, you should configure the scale profile to make the system most efficient for
your specific network architecture.
Before You Begin
In general, the route switch processor (RSP) with 6 GB of memory is capable of loading 1.3 million IPv4
routes. For large scale routes like 4 million, 12 GB of memory is required.
The RSP440 supports 1.3 million IPv4 routes with the default memory.
Cisco ASR 9000 Series Aggregation Services Router System Management Configuration Guide, Release 5.1.x
5
Configuring Profiles
Relationship Between Scale and Feature Profiles
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