Cisco ASR 900 Series Release Notes

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Cisco IOS XE 3S Release Notes for the Cisco ASR 903 Router
OL-26630-12
Chapter
Caveats in Cisco IOS XE 3.7S Releases
Conditions: Occurs after you issue an OIR on the T1/E1 interface module from the active RSP. The
issue occurs in a redundant system.
Workaround: There is no workaround.
• CSCub74338
Symptoms: The router crashes.
Conditions: Occurs when you attach an ingress QoS policy-map to an EVC with a rewrite push
configuration.
Workaround: There is no workaround.
• CSCub77285
Symptom: Some T1/E1 interfaces do not come up.
Conditions: Occurs with T1/E1 configurations at a high scale; the interfaces display a false alarm.
Workaround: Reset individual T1/E1 interfaces; after a reset, the interfaces become active.
• CSCub89029
Symptoms: When the router boots, copper Gigabit Ethernet ports display an up/up status but do not
pass traffic.
Conditions: Occurs when the port has a negotiated speed other than 1 Gigabit, such as 100 Mbps.
Workaround: Issue a shutdown/no shutdown on affected ports.
• CSCuc36241
Symptoms: The router is unable to select a given PTP clock as a network clock source.
Conditions: Occurs when you configure PTP as an input network clock source while the slave clock
is still in a holdover state. In the holdover state, the slave clock has not yet attempted to establish a
frequency lock with a master clock.
Workaround: Wait for the PTP slave clock to lock to the master clock before configuring PTP as a
network clock input source.
Open Caveats—Cisco IOS XE Release 3.7(0)S
This section documents the unexpected behavior that might be seen with the Cisco ASR 903 Router in
Cisco IOS XE Release 3.7.0S.
• CSCts95896
Symptoms: The router stops passing traffic on EVC interfaces.
Conditions: Occurs when you issue the default interface command and immediately restore the
configuration. The issue occurs with configurations containing either a large number of EFPs or
features that impact EFP programming at a lesser scale, such as QoS.
Workaround: Wait for the router to clear the old EFP configuration before adding a new
configuration.
• CSCtw72855
Symptoms: The router does not pass traffic towards the access side on VCs configured with QoS
shaping output policy.
Conditions: Occurs when you configure a QoS shaping output policy.
Workaround: There is no workaround.

Cisco ASR 900 Series Specifications

General

Brand	Cisco
Model	ASR 900 Series
Category	Network Router
Language	English