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On an AVE there is, by default, one network interface created named eth0 . After an AVE reboot, the eth0 interface is not present: ifconfig eth0 eth0: error fetching interface information: Device not found The list of available network interfaces confirms that eth0 is missing but a new, unconfigured interface called eth1 is present: ifconfig -a eth1 Link encap:Ethernet HWaddr 00:15:5D:C8:BC:B4 BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1080 RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:5258453 errors:0 dropped:0 overruns:0 frame:0 TX packets:5258453 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:3043137745 (2902.1 Mb) TX bytes:3043137745 (2902.1 Mb) The eth0 configuration file is present and is unaltered: ls -l /etc/sysconfig/network/ifcfg-eth0 -rw-r--r-- 1 root root 62 Jul 21 2003 /etc/sysconfig/network/ifcfg-eth0 cat /etc/sysconfig/network/ifcfg-eth0 STARTMODE='auto' BOOTPROTO='static' IPADDR='10.10.10.10/24' NETMASK='255.255.255.0' BROADCAST='' ETHTOOL_OPTIONS='' MTU='' NAME='' NETWORK='' REMOTE_IPADDR='' USERCONTROL='no' There is no eth1 configuration file: ls -l /etc/sysconfig/network/ifcfg-eth1 ls: cannot access /etc/sysconfig/network/ifcfg-eth1: No such file or directory Device messages show that eth0 has been renamed to eth1: dmesg | grep -i eth0 [ 1678.268338] udev: renamed network interface eth0 to eth1 The /etc/udev/rules.d/70-persistent-net.rules file has an entry for eth0 and an entry for eth1, both with different MAC addresses: cat /etc/udev/rules.d/70-persistent-net.rules # PCI device 0x8086:0x100f (e1000) SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}==" 00:50:56:80:94:f7 ", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME=" eth0 " SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}==" 00:15:5D:C8:BC:B4 ", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME=" eth1 "
By default, Microsoft Hyper-V uses dynamic MAC address generation, which causes a different MAC address to be reassigned to the AVE virtual machine:
1. Shut down the AVE. 2. Go to the Settings for the AVE in the Hyper-V manager. 3. Expand the settings for the "Network Adapter" in the left pane, and select "Advanced Features": 4. Select "Static" within the "MAC Address" box (as shown above). The address fields should already be populated with the default assigned by Hyper-V. 5. Press OK to save the settings. 6. Turn on the AVE. 7. If there is a Data Domain attached to Avamar, use the command dpnctl start all to restart the Avamar services.
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