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Route table shows 'UNKNOWN-ERROR' for some routes

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TitleRoute table shows 'UNKNOWN-ERROR' for some routes
Symptoms
  • For 10.83.50.0/24 and 10.3.0.0/24 one VSP 8400 switch Core4 is showing unknown error under the NH VRF/ISID column, below.
 
VSP:1#% sho ip route 10.83.50.0
=====================================================================================================
IP Route - GlobalRouter
=====================================================================================================
NH INTER
DST MASK NEXT VRF/ISID COST FACE PROT AGE TYPE PRF
-----------------------------------------------------------------------------------------------------
10.83.50.0 255.255.255.0 Core3 UNKNOWN-ERROR 3 3995 ISIS 0 IBSE 130
10.83.50.0 255.255.255.0 Core3 UNKNOWN-ERROR 3 3996 ISIS 0 IBSE 130
10.83.50.0 255.255.254.0 159.116.1.65 GlobalRouter 20 2057 OSPF 0 IB 125

3 out of 5293 Total Num of Route Entries, 3910 Total Num of Dest Networks displayed.
acli.pl: Displayed Record Count = 3
--------------------------------------------------------------------------------------------------
TYPE Legend:
I=Indirect Route, D=Direct Route, A=Alternative Route, B=Best Route, E=Ecmp Route,
U=Unresolved Route, N=Not in HW, F=Replaced by FTN, V=IPVPN Route, S=SPBM Route
PROTOCOL Legend:
v=Inter-VRF route redistributed

 
Environment
  • VSP 8400
  • VOSS 7.1.1.0
  • VOSS 8.0.6
Cause
Resolution
  • Upgrade to software 7.1.5.0 or 8.0.7
Additional notes

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