I've test all: physical connection, performance of port in router, correcting input; it's all ok. There are strange, that WAN led is blink. Also he has print UNKNOWN_ERROR and rarely USER_REQUEST
SQUASHFS error: Unable to read fragment cache entry [1f8dba]
SQUASHFS error: Unable to read page, block 1f8dba, size 1ca98
eth1: link down
IPv6: ADDRCONF(NETDEV_UP): eth1: link is not ready
eth1: link up (100Mbps/Full duplex)
IPv6: ADDRCONF(NETDEV_CHANGE): eth1: link becomes ready
Squashfs error suggests the rootfs in flash is corrupted. Try re-flashing (sysupgrade with the same image you have, do not save settings, and re-configure from scratch). On a 4/32 router you can only make a few basic settings because of lack of space in the flash.