Cisco ASR 900 Series Release Notes

5
Cisco IOS XE 3S Release Notes for the Cisco ASR 903 Router
OL-26630-12
Chapter
Caveats in Cisco IOS XE 3.7S Releases
Software Upgrade Limitation
• We recommend you set the interface-module-delay value to 150 or greater in order to ensure
sufficient time for IM software upgrades.
Subinterfaces Limitation
• The Cisco ASR 903 router does not support subinterface configurations except on ATM interfaces.
Note You can configure similar functionality using multiple Ethernet Virtual Connections on an
interface. For more information, see Configuring Ethernet Virtual Connections on the Cisco
ASR 903 Router.
T1/E1 IM Limitations
• Inverting data on the T1/E1 interface is not supported—Inverting the data stream using the invert
data interface command is not supported.
• Bit error rate test (BERT) patterns have limited support—Currently, only the 2^11, 2^15,
2^20-O153, and 2^20-QRSS patterns are supported for BERT.
Caveats in Cisco IOS XE 3.7S Releases
Caveats describe unexpected behavior. Severity 1 caveats are the most serious caveats. Severity 2 caveats
are less serious. Severity 3 caveats are moderate caveats and only select severity 3 caveats are included
in this chapter.
This section describes caveats in Cisco IOS XE 3.7S releases.
In this section, the following information is provided for each caveat:
• Symptom—A description of what is observed when the caveat occurs.
• Conditions—The conditions under which the caveat has been known to occur.
• Workaround—Solutions, if available, to counteract the caveat.
Note If you have an account on Cisco.com, you can also use the Bug Toolkit to find select caveats of any
severity. To reach the Bug Toolkit, log in to Cisco.com and go to
http://www.cisco.com/pcgi-bin/Support/Bugtool/launch_bugtool.pl. (If the defect that you have
requested cannot be displayed, this may be due to one or more of the following reasons: the defect
number does not exist, the defect does not have a customer-visible description yet, or the defect has been
marked Cisco Confidential.)
The Dictionary of Internetworking Terms and Acronyms contains definitions of acronyms that are not
defined in this document:
http://docwiki.cisco.com/wiki/Category:Internetworking_Terms_and_Acronyms_(ITA)
The following sections describe the open and resolved caveats in 3.7S Releases:
• Open Caveats—Cisco IOS XE Release 3.7(5)S, page 7
• Resolved Caveats—Cisco IOS XE Release 3.7(5)S, page 8
• Open Caveats—Cisco IOS XE Release 3.7(4)S, page 10
• Resolved Caveats—Cisco IOS XE Release 3.7(4)S, page 13

Cisco ASR 900 Series Specifications

General

Brand	Cisco
Model	ASR 900 Series
Category	Network Router
Language	English