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Cisco Bug: CSCte20486 - KeepAliveTimeOut with Synch status onlyOnRPM

Last Modified

Feb 22, 2014

Products (1)

  • Cisco IOS

Known Affected Releases


Description (partial)

MGX RPM-XF PPP down after swapping RPM-XF
(KeepAliveTimeOut with Synch status onlyOnRPM)

The problem can happen when both Primary -> Secondary and Secondary -> Primary RPM-XF switchover (1:N), typically affecting multiple connections between PXM-XF, so far seen with IOS upgrade on RPM-XF, causing the outage of BTSs, never auto-recovered till manual intervention (dncon/upcon).

Followings were confirmed when the problem was occurring.

dspppplink(switchside) : Fail Reason is "KeepAliveTimeOut"
tstdelay : "Failed"
dspchancnt : does not increase at Both Rcv and Xmt
sarLcnInfo switchside : does not increase at Rcv

show interface : switch int does not receive packet
show atm pvc : PPP status "LCP negotiation" can not complete
show switch connections : "onlyOnRpm"


ATM connection between PXM-XF seems to have a problem. ("onlyOnRpm")
Never restored by RPM-XF/PXM45C/MPSM card swtichover
Restored by dncon/upcon commands (on MPSM)
Not reproducible at Cisco lab over 200 times RPM-XF switchover test.
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