I noticed on a 2060X which is connected to a vPC pair Nexus 5500 unknown routing entries.
The displayed default gateway (.11) was present on one of the old Core Switches. While doing the migration the cisco Nexus acts now as the default gateway (.1) and and the old core switches were turned off.
On the 2060X there is configured the default-gateway pointing to the HSRP address of the nexus. But there are on all 2060X some routes with another default gateway.
ip default-gateway x.x.x.1
Maybe this is a bug ?!
SWITCH-NAME#sh ip route
Default gateway is x.x.x.1
Host Gateway Last Use Total Uses Interface
a.b.c.d x.x.x.11 0:05 7584 Vlan2
e.f.g.h x.x.x.11 0:00 99681 Vlan2
.11 was the old gateway which was connected on the old core switches (other vendor)
Software on 2960X: 15.0(2)EX4
I'm seeing the exact same problem. Software: c2960x-universalk9-mz.150-2.EX4.bin
It looks like a bug. Were you able to resolve this problem?