интернет дома, ростелеком, adsl, роутер zyxel, комп с встроенным реалтек, без dhcp, статикой
ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 brd 127.255.255.255 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 00:1f:d0:88:81:d6 brd ff:ff:ff:ff:ff:ff
inet 192.168.1.77/24 brd 192.168.1.255 scope global eth0
valid_lft forever preferred_lft forever
inet6 fe80::21f:d0ff:fe88:81d6/64 scope link
valid_lft forever preferred_lft forever
3: sit0: <NOARP> mtu 1480 qdisc noop state DOWN group default
link/sit 0.0.0.0 brd 0.0.0.0
при лагах wireshark выдает TCP Retransmission и
40 39.655976 Giga-Byt_88:81:d6 -> ZygateCo_cf:3b:0e ARP 42 Who has 192.168.1.1? Tell 192.168.1.77
41 39.656318 ZygateCo_cf:3b:0e -> Giga-Byt_88:81:d6 ARP 60 192.168.1.1 is at xxx
upd: обновил прошивку, проблема исчезла.