Cisco ASR 903 Release Notes page 232

Caveats in Cisco IOS XE 3.9S Releases
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CSCud38589
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Symptoms: DMM Session Stops Working
Conditions: DMM configured on BD UP MEP, with redundant links on the Core side, which are in
STP Fwding / Blocked state, Issue seen when the STP Fwd Port is shut.
Workaround: restart the IP SLA session or unshut the port and bring it FWD state
CSCud38880
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Symptoms: IPv6 traffic drop post SSO with MetroIP services license.
Conditions: 1. Start bidirectional IPv6 traffic on ASR903 with dual RSP and MetroIP services
license, 3.7.1a. Put at least 3-4 streams each running at 10Mbps 2. Force switchover " redundancy
force switchover" 3. IPv6 traffic will drop for 4-5 seconds. If you see drops in few milliseconds, then
try adding more traffic. Issue is consistently recreatable.
Workaround: Upgrade the license to MetroAgg, add v6 static neighbor on the port facing test set
and force switchover, now there will be no ipv6 traffic loss.
• CSCud41217
Symptoms: Multicast traffic dropped on 903.
Conditions: The following l2 configuration are there. There are 3 satellites connected in the setup,
only 903 satellite interfaces are showed here.All interfaces are in the same bridge domain. When
sent the mcast traffic from 2/4, it is expected that all the satellite interface would received the traffic.
But the two 903 satellite interfaces didn't receive the traffic, the other interfaces from other satellite
were fine.
2/4 --------gi0/3/0/11 PE1 gi400/0/2/1 --------3/2 gi400/0/3/1 --------7/4 ..... (901, 9000v satellite
interfaces are omitted)
2/4 sent (225.1.1.1, 192.10.1.1) at the rate of 2000 pps.
Workaround: No workaround.
CSCud44768
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Symptom: Multilink bundles and member links flap when passing traffic.
Conditions: Occurs under the following conditions:
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Workaround: There is no workaround.
CSCud48356
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Symptoms: Nile Manager crash seen while configuring service instance
Conditions: After applying mpls tp config on back to back consoles
Workaround: There is no workaround.
• CSCud50944
Symptom: The router drops traffic on an MLPPP bundle.
Conditions: Occurs following a reload while the router is passing traffic close to the line rate. The
issue occurs less frequently with lower traffic rates.
Workaround: Issue a shutdown/no shutdown on multilink interface.
Cisco IOS XE 3S Release Notes for the Cisco ASR 903 Router
46
Shut down one of the ECMP paths.
You configure more than 210 MLPPP bundles with one member link per bundle or 16 bundles
with 16 member links each.
The line is operating at a 64 or 128 byte line rate
OL-26630-08