Cisco ASR 900 Series Release Notes page 148

Caveats in Cisco IOS XE 3.7S Releases
Conditions: Occurs when you boot the router running QoS configurations at a high scale,
particularly queues.
Workaround: There is no workaround.
CSCua12366
•
Symptoms: The IOMD process corresponding to OC3 IM (interface module) crashes.
Conditions: Occurs when you perform an IM OIR after the router has been passing traffic.
Workaround: There is no workaround; the IM recovers after the crash and resumes traffic.
CSCua16143
•
Symptoms: IPv6 BFD sessions drop after you perform an SSO.
Conditions: Occurs when you perform an SSO on the router while running an IPv6 BFD
configuration. The issue does not occur with an IPv4 BFD configuration.
Workaround: After SSO, perform a shutdown/no shutdown on the physical interface.
CSCua16492
•
Symptoms: Some IPv6 multi-hop BFD over BGP sessions flap.
Conditions: Occurs on port-channel interfaces running IPv6 multi-hop BFD over BGP sessions
after you perform an SSO.
Workaround: There is no workaround.
CSCua25932
•
Symptoms: Convergence caused by an interface flap takes more than 50 milliseconds.
Conditions: Occurs when you enable BGP PIC core and LFA FRR at the same time.
Workaround: Use LFA FRR, as it converges in less than 50 milliseconds for BGP VPNv4 prefixes.
• CSCua33453
Symptoms: A CFM configuration crashes after passing traffic for several hours.
Conditions: Occurs when you create the following configuration:
–
–
–
Workaround: There is no workaround.
CSCua33788
•
Symptoms: The router does not pass multicast traffic consistently; only some traffic passes.
Conditions: Occurs when you configure 255 EVCs spanning across different slots on the router.
Workaround: There is no workaround.
CSCua36065
•
Symptoms: The router forwards multicast traffic on 63 out of 255 multicast output interfaces
(OIFs).
Conditions: Occurs when you configure the following:
–
–
–
Cisco IOS XE 3S Release Notes for the Cisco ASR 903 Router
60
A port-channel interface configured with an EVC and applied to a bridge-domain
A physical interface configured as a trunk EFP
The offload sampling command is configured on both interfaces
255 EVCs on a single port mapped to 255 BDIs (one EVC per BDI) using rewrite tagging.
255 BDIs which send IGMP v2 Joins to a single multicast group.
255 EVCs configured as a routed port with the port a member link of a port-channel.
Chapter
OL-26630-12