Hey Joe, I tested kernel 3.19.0-26.27 and we still have the issue: $ ifconfig eth0 Link encap:Ethernet HWaddr fc:15:b4:21:00:c2 inet addr:10.229.65.139 Bcast:10.229.255.255 Mask:255.255.0.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:219 errors:0 dropped:0 overruns:0 frame:0 TX packets:164 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:49226 (49.2 KB) TX bytes:23267 (23.2 KB) juju-br0 Link encap:Ethernet HWaddr fc:15:b4:21:00:c2 inet addr:10.229.65.139 Bcast:10.229.255.255 Mask:255.255.0.0 inet6 addr: fe80::fe15:b4ff:fe21:c2/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:213 errors:0 dropped:0 overruns:0 frame:0 TX packets:134 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:45928 (45.9 KB) TX bytes:20959 (20.9 KB) 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:65536 Metric:1 RX packets:18 errors:0 dropped:0 overruns:0 frame:0 TX packets:18 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:1744 (1.7 KB) TX bytes:1744 (1.7 KB) ubuntu@ms10-39-mcdivittB0:~$ netstat -rn Kernel IP routing table Destination Gateway Genmask Flags MSS Window irtt Iface 0.0.0.0 10.229.0.1 0.0.0.0 UG 0 0 0 eth0 10.229.0.0 0.0.0.0 255.255.0.0 U 0 0 0 juju-br0 ubuntu@ms10-39-mcdivittB0:~$ uname -a Linux ms10-39-mcdivittB0 3.19.0-26-generic #27-Ubuntu SMP Tue Jul 28 18:47:37 UTC 2015 aarch64 aarch64 aarch64 GNU/Linux from the juju side: 2015-10-23 12:14:37 INFO juju.provider.maas environ.go:1088 could not acquire a node in zone "avaton", trying another zone 2015-10-23 12:14:43 INFO juju.provider.maas environ.go:1088 could not acquire a node in zone "default", trying another zone 2015-10-23 12:14:43 DEBUG juju.provider.maas environ.go:1819 node "/MAAS/api/1.0/nodes/node-ae1dfe5e-5bc1-11e5-872f-00163ec335e8/" skipping disabled network interface "eth1" 2015-10-23 12:14:43 DEBUG juju.provider.maas environ.go:1811 node "/MAAS/api/1.0/nodes/node-ae1dfe5e-5bc1-11e5-872f-00163ec335e8/" primary network interface is "eth0" 2015-10-23 12:14:43 DEBUG juju.provider.maas environ.go:773 node "/MAAS/api/1.0/nodes/node-ae1dfe5e-5bc1-11e5-872f-00163ec335e8/" has network interfaces map[fc:15:b4:21:00:c3:{0 eth1 true} fc:15:b4:21:00:c2:{1 eth0 false}] 2015-10-23 12:14:43 DEBUG juju.provider.maas environ.go:778 node "/MAAS/api/1.0/nodes/node-ae1dfe5e-5bc1-11e5-872f-00163ec335e8/" has networks [] 2015-10-23 12:14:43 DEBUG juju.provider.maas environ.go:820 node "/MAAS/api/1.0/nodes/node-ae1dfe5e-5bc1-11e5-872f-00163ec335e8/" network information: []network.InterfaceInfo(nil) 2015-10-23 12:14:43 DEBUG juju.cloudconfig.instancecfg instancecfg.go:521 Setting numa ctl preference to false 2015-10-23 12:14:43 DEBUG juju.service discovery.go:65 discovered init system "upstart" from series "trusty" 2015-10-23 12:14:43 DEBUG juju.provider.maas environ.go:962 maas user data; 1665 bytes 2015-10-23 12:14:44 DEBUG juju.provider.maas environ.go:967 started instance "/MAAS/api/1.0/nodes/node-ae1dfe5e-5bc1-11e5-872f-00163ec335e8/" 2015-10-23 12:14:45 DEBUG juju.provider.common state.go:36 putting "provider-state" to bootstrap storage *maas.maasStorage 2015-10-23 12:14:45 DEBUG juju.provider.maas volumes.go:217 acquire maas node: missing volume label for id "8" - /MAAS/api/1.0/nodes/node-ae1dfe5e-5bc1-11e5-872f-00163ec335e8/ 2015-10-23 12:21:25 INFO juju.environs.bootstrap bootstrap.go:184 newest version: 1.24.7 2015-10-23 12:21:25 INFO juju.environs.bootstrap bootstrap.go:212 picked bootstrap tools version: 1.24.6 2015-10-23 12:21:25 INFO juju.cmd cmd.go:113 Installing Juju agent on bootstrap instance 2015-10-23 12:21:25 DEBUG juju.cloudconfig.instancecfg instancecfg.go:521 Setting numa ctl preference to false 2015-10-23 12:21:25 DEBUG juju.provider.common bootstrap.go:89 using "juju-br0" as network bridge for all container types Waiting for address Attempting to connect to ms10-39-mcdivittB0.1ss:22 Attempting to connect to ms10-39-mcdivittB0.1ss:22 2015-10-23 12:21:25 DEBUG juju.provider.common bootstrap.go:254 connection attempt for ms10-39-mcdivittB0.1ss failed: ssh: connect to host ms10-39-mcdivittb0.1ss port 22: Connection refused 2015-10-23 12:21:25 DEBUG juju.provider.common bootstrap.go:254 connection attempt for ms10-39-mcdivittB0.1ss failed: ssh: connect to host ms10-39-mcdivittb0.1ss port 22: Connection refused 2015-10-23 12:21:30 DEBUG juju.provider.common bootstrap.go:254 connection attempt for ms10-39-mcdivittB0.1ss failed: ssh: connect to host ms10-39-mcdivittb0.1ss port 22: Connection refused 2015-10-23 12:21:30 DEBUG juju.provider.common bootstrap.go:254 connection attempt for ms10-39-mcdivittB0.1ss failed: ssh: connect to host ms10-39-mcdivittb0.1ss port 22: Connection refused 2015-10-23 12:21:44 DEBUG juju.provider.common bootstrap.go:254 connection attempt for ms10-39-mcdivittB0.1ss failed: @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY! Someone could be eavesdropping on you right now (man-in-the-middle attack)! It is also possible that a host key has just been changed. The fingerprint for the ECDSA key sent by the remote host is e5:cf:36:e3:5a:3d:a1:4b:77:35:02:b3:cc:02:e1:0c. Please contact your system administrator. Add correct host key in /home/sfeole/.ssh/known_hosts to get rid of this message. Offending ECDSA key in /home/sfeole/.ssh/known_hosts:32 remove with: ssh-keygen -f "/home/sfeole/.ssh/known_hosts" -R ms10-39-mcdivittb0.1ss Keyboard-interactive authentication is disabled to avoid man-in-the-middle attacks. /var/lib/juju/nonce.txt does not exist 2015-10-23 12:21:44 DEBUG juju.provider.common bootstrap.go:254 connection attempt for ms10-39-mcdivittB0.1ss failed: @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY! Someone could be eavesdropping on you right now (man-in-the-middle attack)! It is also possible that a host key has just been changed. The fingerprint for the ECDSA key sent by the remote host is e5:cf:36:e3:5a:3d:a1:4b:77:35:02:b3:cc:02:e1:0c. Please contact your system administrator. Add correct host key in /home/sfeole/.ssh/known_hosts to get rid of this message. Offending ECDSA key in /home/sfeole/.ssh/known_hosts:32 remove with: ssh-keygen -f "/home/sfeole/.ssh/known_hosts" -R ms10-39-mcdivittb0.1ss Keyboard-interactive authentication is disabled to avoid man-in-the-middle attacks. /var/lib/juju/nonce.txt does not exist 2015-10-23 12:21:58 DEBUG juju.utils.ssh ssh.go:249 using OpenSSH ssh client @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY! Someone could be eavesdropping on you right now (man-in-the-middle attack)! It is also possible that a host key has just been changed. The fingerprint for the ECDSA key sent by the remote host is e5:cf:36:e3:5a:3d:a1:4b:77:35:02:b3:cc:02:e1:0c. Please contact your system administrator. Add correct host key in /home/sfeole/.ssh/known_hosts to get rid of this message. Offending ECDSA key in /home/sfeole/.ssh/known_hosts:32 remove with: ssh-keygen -f "/home/sfeole/.ssh/known_hosts" -R ms10-39-mcdivittb0.1ss Keyboard-interactive authentication is disabled to avoid man-in-the-middle attacks. Logging to /var/log/cloud-init-output.log on remote host Running apt-get update hanging @ apt-get update. I will try the kernel you built right now.