Name: Cisco ASR 900 Series
Brand: Cisco
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Cisco IOS XE 3S Release Notes for the Cisco ASR 903 Router

OL-26630-12

Chapter

Limitations and Restrictions

The following sections describe the Cisco ASR 903 Router limitations in IO S XE 3.7 releases:

• Limitations and Restrictions in Cisco IOS XE Release 3.7(5)S, page 2

• Limitations and Restrictions in Cisco IOS XE Release 3.7(4)S, page 2

• Limitations and Restrictions in Cisco IOS XE Release 3.7(3)S, page 2

• Limitations and Restrictions in Cisco IOS XE Release 3.7(2)S, page 2

• Limitations and Restrictions in Cisco IOS XE Release 3.7(1)aS, page 3

• Limitations and Restrictions in Cisco IOS XE Release 3.7(0)S, page 3

Limitations and Restrictions in Cisco IOS XE Release 3.7(5)S

There are no changes in limitations and restrictions in Cisco IOS XE Release 3.7(5)S; the restrictions

from IOS XE Release 3.7(2)S still apply.

Limitations and Restrictions in Cisco IOS XE Release 3.7(4)S

There are no changes in limitations and restrictions in Cisco IOS XE Release 3.7(4)S; the restrictions

from IOS XE Release 3.7(2)S still apply.

Limitations and Restrictions in Cisco IOS XE Release 3.7(3)S

There are no changes in limitations and restrictions in Cisco IOS XE Release 3.7(3)S; the restrictions

from IOS XE Release 3.7(2)S still apply.

Limitations and Restrictions in Cisco IOS XE Release 3.7(2)S

The following limitations and restrictions apply to Cisco IOS XE Release 3.7(2)S for the

Cisco ASR 903 Router:

• LFA FRR Limitations—Release 3.7.2 has the following limitations for Loop Free Alternate

Fast-reroute (LFA FRR):

–

To enable LFA FRR, you must include the mpls ldp explicit-null command. The implicit-null

command is not supported.

–

LFA FRR is not supported with equal cost multipath (ECMP).

–

The ASR 903 supports up to 4000 LFA FRR routes.

–

Remote LFA tunnels are not HA aware; hence they are SSO co-existent but not SSO compliant.

• The restrictions from IOS XE Release 3.7(0)S apply to Release 3.7(2). For more information, see

Limitations and Restrictions in Cisco IOS XE Release 3.7(0)S, page 3.

Cisco ASR 900 Series Release Notes

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