In 1.17.0 busybox ip r not work. ip a and ip l work correctly.

Example:

~ # ip r
BusyBox v1.17.0 (2010-07-24 02:48:37 OMSST) multi-call binary.

Usage: ip [OPTIONS] {address | route | link | tunnel | rule} {COMMAND}

ip [OPTIONS] OBJECT {COMMAND}
where OBJECT := {address | route | link | tunnel | rule}
OPTIONS := { -f[amily] { inet | inet6 | link } | -o[neline] }

~ # ip route
192.168.1.0/24 dev br0  src 192.168.1.1 
10.0.0.0/8 dev eth2.2  src 10.8.0.233 
127.0.0.0/8 dev lo 
default dev ppp0

~ # ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN 
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.0/8 scope host lo
2: eth2: <BROADCAST,MULTICAST,UP,LOWER_UP100> mtu 1600 qdisc pfifo_fast state UNKNOWN qlen 1000
    link/ether 00:0c:43:30:52:67 brd ff:ff:ff:ff:ff:ff