Cisco ASR 900 Series Release Notes page 226

Caveats in Cisco IOS XE 3.9S Releases
Conditions: Punt/inject keepalives are missed and we are not holding a TTY while writing to
punt/inject log file.
Workaround: none
CSCue96886
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Symptoms: Complete MAC Address space is not available on the RSP
Conditions: Removing the Service instance with the MAC Addresses learnt on the BD.
Workaround: Reload the Router is only workaround.
CSCue97114
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Symptoms: Shut down the trunk efp in core side, meps are learnt for UP MEP
Conditions: Configured UP Mep evc bd (core side trunk efp) when i shut the trunk efp in core
remote meps are learnt for UP MEP.
Workaround: Configure evc bd in core side
CSCuf05090
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Symptoms: Standby will be resetting continuously with running config sync failure.
Conditions:
Downgrade all IMs and take the IMS out of slot.After booting up with XE39 image , insert IMs one
by one. While upgrade was happening , this issue happened.Im got crashed and stanby was resetting
continuously with SYNc failed.
Workaround: Reload the box completely.
CSCuf20275
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Symptoms: On interoperating with an ASR901 router, BFD sessions may flap as the ASR903 router
may some times not send BFD control messages.
Conditions: With around 200 global IPv4 prefixes, BFD session running in software with echo OFF
and seen even without any data traffic.
Workaround: There is no work-around known as yet.
CSCuf44077
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Symptoms: show interface output is showing wrong speed values after sso
Conditions: when we use the 100M SFP's
Workaround: There is no functionality impact because of this. HW module reset will resolve this.
CSCuf56723
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Symptoms: Interface LED glows green with shut.
Conditions: After SSO
Workaround: No workaround.
• CSCuf60346
Symptoms: IOMd Crash On Performing SSO Switchover With Interfaces Shut
Conditions: Have ATM/IMA interfaces shut. Perform switchover and notice IOMd crash on new
Active
Workaround: No workaround
CSCuf64404
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Cisco IOS XE 3S Release Notes for the Cisco ASR 903 Router
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OL-26630-12