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Cisco Bug: CSCtf17435 - 2941: Impact of MPLS switching and CEM/ATM PWE3 on 1588 packet-timing

Last Modified

Apr 27, 2016

Products (2)

  • Cisco MWR 2900 Series Mobile Wireless Routers
  • Cisco MWR 2941-DC Mobile Wireless Router

Known Affected Releases

12.2(33)MRA 12.4(20)MR1

Description (partial)

Symptom:

The 1588 PTP network clock recovery mechanism cannot be used when the MWR2941 is configured as MPLS LSR in a ring topology.
The impact of the traffic load in such configuration triggers Packet Delay Variation (PDV) side effects that destroy the transfer performances of the 1588 PTP protocol packets.

Conditions:

MWR2941's are connected in a ring and configured for MPLS switching on the ring interfaces (no bridging on MWR2941). CEM and ATM pseudowires are configured and carrying traffic. 1588 PTP packet timing is used.
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