I am having an issue where eth1 is throwing some messages and stops responding. Restarting networking doesn't work and also just bringing down eth1 with 'ifdown' doesn't fix it. I have never seen anything like these messages: eth1: no IPv6 routers present r8169 0000:03:00.0: eth1: rtl_counters_cond == 1 (loop: 1000, delay: 10). r8169 0000:03:00.0: eth1: rtl_chipcmd_cond == 1 (loop: 100, delay: 100). r8169 0000:03:00.0: eth1: rtl_phyar_cond == 1 (loop: 20, delay: 25). r8169 0000:03:00.0: eth1: rtl_phyar_cond == 1 (loop: 20, delay: 25). r8169 0000:03:00.0: eth1: rtl_phyar_cond == 1 (loop: 20, delay: 25). r8169 0000:03:00.0: eth1: rtl_phyar_cond == 1 (loop: 20, delay: 25). r8169 0000:03:00.0: eth1: rtl_phyar_cond == 1 (loop: 20, delay: 25). r8169 0000:03:00.0: eth1: rtl_phyar_cond == 1 (loop: 20, delay: 25). r8169 0000:03:00.0: eth1: rtl_phy_reset_cond == 1 (loop: 100, delay: 1). r8169 0000:03:00.0: eth1: rtl_phyar_cond == 1 (loop: 20, delay: 25). r8169 0000:03:00.0: eth1: rtl_phyar_cond == 1 (loop: 20, delay: 25). r8169 0000:03:00.0: eth1: rtl_phyar_cond == 1 (loop: 20, delay: 25). r8169 0000:03:00.0: eth1: rtl_phyar_cond == 1 (loop: 20, delay: 25). r8169 0000:03:00.0: eth1: rtl_phyar_cond == 1 (loop: 20, delay: 25). r8169 0000:03:00.0: eth1: rtl_phyar_cond == 1 (loop: 20, delay: 25). r8169 0000:03:00.0: eth1: rtl_phyar_cond == 1 (loop: 20, delay: 25). r8169 0000:03:00.0: eth1: link up [root at mail jtsm]# lspci | grep -i net 02:00.0 Ethernet controller: Intel Corporation 82574L Gigabit Network Connection 03:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 01) DEVICE=eth1 HWADDR=00:0A:CD:17:07:7E TYPE=Ethernet UUID=800623a1-adc6-401a-a3fa-c6d1348056c8 ONBOOT=yes NM_CONTROLLED=yes BOOTPROTO=none IPADDR=10.0.254.11 PREFIX=24 #GATEWAY=10.0.254.1 DNS1=8.8.8.8 DNS2=8.8.4.4 Does anyone have any ideas or have experienced this before.