Cannot connect to PTP550, ssh and http is not working

hi to all. strange thing
can connect to adjacent PTP via mak-telnet only.
the device respond to ping and ssh and http services are up.
tcpdump didn’t show any related packet coming to the br-lan interface
someone has such behaviour ?

POKOCH2>show netstat
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 0.0.0.0:www 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:ssh 0.0.0.0:* LISTEN
tcp 0 0 ::ffff:127.0.0.1:9090 :::* LISTEN
udp 0 0 0.0.0.0:5678 0.0.0.0:*
udp 0 0 0.0.0.0:20561 0.0.0.0:*
udp 0 0 0.0.0.0:snmp 0.0.0.0:*
POKOCH2>ping 172.31.254.59
PING 172.31.254.59 (172.31.254.59) 56(84) bytes of data.
64 bytes from 172.31.254.59: icmp_req=1 ttl=64 time=0.117 ms
64 bytes from 172.31.254.59: icmp_req=2 ttl=64 time=0.094 ms
^C
— 172.31.254.59 ping statistics —
2 packets transmitted, 2 received, 0% packet loss, time 999ms
rtt min/avg/max/mdev = 0.094/0.105/0.117/0.015 ms
POKOCH2>ping 172.31.254.60
PING 172.31.254.60 (172.31.254.60) 56(84) bytes of data.
64 bytes from 172.31.254.60: icmp_req=1 ttl=64 time=3.60 ms
64 bytes from 172.31.254.60: icmp_req=2 ttl=64 time=1.51 ms
64 bytes from 172.31.254.60: icmp_req=3 ttl=64 time=14.9 ms
^C
— 172.31.254.60 ping statistics —
3 packets transmitted, 3 received, 0% packet loss, time 2002ms
rtt min/avg/max/mdev = 1.512/6.703/14.991/5.922 ms
POKOCH2>show arp
/bin/sh: ip: not found
IP address HW type Flags HW address Mask Device
POKOCH2>
POKOCH2>
POKOCH2>

output from PTP with the issue. Layer 2 works well, the PTP sees LLDP Cisco neighbour switch and all traffic comes via the radio link well, but management :frowning:

show arp output from working system:
Connected sessions:
User: Started [seconds ago]: Last activity: IP:
admin (current) 0 0 172.17.100.93

ICHALKIL>show arp
IP address HW type Flags HW address Mask Device
172.31.254.58 0x1 0x2 d0:ec:35:cb:7d:03 * br-lan
172.31.254.58 0x1 0x0 00:00:00:00:00:00 * eth0
172.31.254.58 0x1 0x0 00:00:00:00:00:00 * ath0
ICHALKIL>
so issue is in “/bin/sh: ip: not found” message. How to connect to Linux bash to restore ip program ?