[HELP, URGENT!!!!!] can't ping private subnet!!!

EDIT resolved. thank god. Apparently, the switch is too old, I keep escalating and after a switch replacement everything is working as intended.

so I have em2(192.168.57.0/24), which is connected to a switch. and p2p4 which is connected to outside. I can ping 8.8.8.8 no problem. However, i cannot ping anywhere in the 192.168.57.0/24 subnet. This is a fileserver and now server on fire!!! All the machines inside the subnet can ping each other tho. The switch's ip address is 192.168.57.1, and other machines range from .2 to .13. (The switch is an un-managed dumb switch that's pretty old, i'm working remotely so I don't know anything about the switch, no remote hands is there too. But I am sure no one touches the switch.)

netstat -rn 0.0.0.0 98.234.234.234 0.0.0.0 UG 0 0 0 p2p4 98.234.234.234 0.0.0.0 255.255.255.224 U 0 0 0 p2p4 192.168.57.0 0.0.0.0 255.255.255.0 U 0 0 0 em2 #cat ifconfig em2 inet 192.168.57.65 netmask 255.255.255.0 broadcast 192.168.57.255 ether 34:17:eb:ee:a5:48 txqueuelen 1000 (Ethernet) RX packets 16905 bytes 1720743 (1.6 MiB) RX errors 0 dropped 131 overruns 0 frame 0 TX packets 30 bytes 2208 (2.1 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 device interrupt 17 #cat ifcfg-em2 BOOTPROTO=static DEVICE="em2" NAME="em2" ONBOOT=yes IPADDR=192.168.57.65 NETMASK=255.255.255.0 #GATEWAY=192.168.57.1 #manifests]# traceroute 192.168.57.65 traceroute to 192.168.57.65 (192.168.57.65), 30 hops max, 60 byte packets 1 192.168.57.65 (192.168.57.65) 0.015 ms 0.006 ms 0.004 ms # traceroute 192.168.57.1 traceroute to 192.168.57.1 (192.168.57.1), 30 hops max, 60 byte packets 1 192.168.57.65 (192.168.57.65) 3005.340 ms !H 3005.325 ms !H 3005.317 ms !H # ping 192.168.57.1 PING 192.168.57.1 (192.168.57.1) 56(84) bytes of data. From 192.168.57.65 icmp_seq=1 Destination Host Unreachable From 192.168.57.65 icmp_seq=2 Destination Host Unreachable From 192.168.57.65 icmp_seq=3 Destination Host Unreachable From 192.168.57.65 icmp_seq=4 Destination Host Unreachable # ping 192.168.57.65 (own ip) PING 192.168.57.65 (192.168.57.65) 56(84) bytes of data. 64 bytes from 192.168.57.65: icmp_seq=1 ttl=64 time=0.014 ms 64 bytes from 192.168.57.65: icmp_seq=2 ttl=64 time=0.009 ms 

ethtool say the link is up. I purposely switch between em1 and em2 and it is up, it's not a hardware problem. I troubleshoot for hours, I don't know what's going on, it's should be a simple problem but it's not. I'm freaking out right now. Sorry for being so freaked out.