diff --git a/apps/cordvtn/src/main/java/org/onosproject/cordvtn/impl/RemoteIpCommandUtil.java b/apps/cordvtn/src/main/java/org/onosproject/cordvtn/impl/RemoteIpCommandUtil.java
new file mode 100644
index 0000000..c09e3a0
--- /dev/null
+++ b/apps/cordvtn/src/main/java/org/onosproject/cordvtn/impl/RemoteIpCommandUtil.java
@@ -0,0 +1,243 @@
+/*
+ * Copyright 2016-present Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.onosproject.cordvtn.impl;
+
+import com.google.common.collect.Sets;
+import com.google.common.io.CharStreams;
+import com.jcraft.jsch.Channel;
+import com.jcraft.jsch.ChannelExec;
+import com.jcraft.jsch.JSch;
+import com.jcraft.jsch.JSchException;
+import com.jcraft.jsch.Session;
+import org.onlab.packet.IpAddress;
+import org.onosproject.cordvtn.api.NetworkAddress;
+import org.onosproject.cordvtn.api.SshAccessInfo;
+import org.slf4j.Logger;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.util.Set;
+import java.util.regex.Pattern;
+import java.util.stream.Collectors;
+
+import static org.slf4j.LoggerFactory.getLogger;
+
+/**
+ * {@code RemoteIpCommandUtil} provides methods to help execute Linux IP commands to a remote server.
+ * It opens individual exec channels for each command. User can create a session with {@code connect}
+ * method and then execute a series commands. After done with all commands, the session must be closed
+ * explicitly by calling {@code disconnect}.
+ */
+public final class RemoteIpCommandUtil {
+
+    protected static final Logger log = getLogger(RemoteIpCommandUtil.class);
+
+    private static final String STRICT_HOST_CHECKING = "StrictHostKeyChecking";
+    private static final String DEFAULT_STRICT_HOST_CHECKING = "no";
+    private static final int DEFAULT_SESSION_TIMEOUT = 60000; // milliseconds
+
+    private static final String IP_PATTERN = "^([01]?\\d\\d?|2[0-4]\\d|25[0-5])\\." +
+            "([01]?\\d\\d?|2[0-4]\\d|25[0-5])\\." +
+            "([01]?\\d\\d?|2[0-4]\\d|25[0-5])\\." +
+            "([01]?\\d\\d?|2[0-4]\\d|25[0-5])$";
+
+    private static final String IP_ADDR_SHOW = "sudo ip addr show %s";
+    private static final String IP_ADDR_FLUSH = "sudo ip addr flush %s";
+    private static final String IP_ADDR_ADD = "sudo ip addr add %s dev %s";
+    private static final String IP_ADDR_DELETE = "sudo ip addr delete %s dev %s";
+    private static final String IP_LINK_SHOW = "sudo ip link show %s";
+    private static final String IP_LINK_UP = "sudo ip link set %s up";
+
+    /**
+     * Default constructor.
+     */
+    private RemoteIpCommandUtil() {
+    }
+
+    /**
+     * Adds a given IP address to a given device.
+     *
+     * @param session ssh connection
+     * @param ip network address
+     * @param device device name to assign the ip address
+     * @return true if the command succeeds, or false
+     */
+    public static boolean addIp(Session session, NetworkAddress ip, String device) {
+        if (session == null || !session.isConnected()) {
+            return false;
+        }
+
+        executeCommand(session, String.format(IP_ADDR_ADD, ip.cidr(), device));
+        Set<IpAddress> result = getCurrentIps(session, device);
+        return result.contains(ip.ip());
+    }
+
+    /**
+     * Removes the IP address from a given device.
+     *
+     * @param session ssh connection
+     * @param ip ip address
+     * @param device device name
+     * @return true if the command succeeds, or false
+     */
+    public static boolean deleteIp(Session session, IpAddress ip, String device) {
+        if (session == null || !session.isConnected()) {
+            return false;
+        }
+
+        executeCommand(session, String.format(IP_ADDR_DELETE, ip, device));
+        Set<IpAddress> result = getCurrentIps(session, device);
+        return !result.contains(ip);
+    }
+
+    /**
+     * Removes all IP address on a given device.
+     *
+     * @param session ssh connection
+     * @param device device name
+     * @return true if the command succeeds, or false
+     */
+    public static boolean flushIp(Session session, String device) {
+        if (session == null || !session.isConnected()) {
+            return false;
+        }
+
+        executeCommand(session, String.format(IP_ADDR_FLUSH, device));
+        return getCurrentIps(session, device).isEmpty();
+    }
+
+    /**
+     * Returns a set of IP address that a given device has.
+     *
+     * @param session ssh connection
+     * @param device device name
+     * @return set of IP prefix or empty set
+     */
+    public static Set<IpAddress> getCurrentIps(Session session, String device) {
+        if (session == null || !session.isConnected()) {
+            return Sets.newHashSet();
+        }
+
+        String output = executeCommand(session, String.format(IP_ADDR_SHOW, device));
+        Set<IpAddress> result = Pattern.compile(" |/")
+                .splitAsStream(output)
+                .filter(s -> s.matches(IP_PATTERN))
+                .map(IpAddress::valueOf)
+                .collect(Collectors.toSet());
+
+        return result;
+    }
+
+    /**
+     * Sets link state up for a given device.
+     *
+     * @param session ssh connection
+     * @param device device name
+     * @return true if the command succeeds, or false
+     */
+    public static boolean setInterfaceUp(Session session, String device) {
+        if (session == null || !session.isConnected()) {
+            return false;
+        }
+
+        executeCommand(session, String.format(IP_LINK_UP, device));
+        return isInterfaceUp(session, device);
+    }
+
+    /**
+     * Checks if a given interface is up or not.
+     *
+     * @param session ssh connection
+     * @param device device name
+     * @return true if the interface is up, or false
+     */
+    public static boolean isInterfaceUp(Session session, String device) {
+        if (session == null || !session.isConnected()) {
+            return false;
+        }
+
+        String output = executeCommand(session, String.format(IP_LINK_SHOW, device));
+        return output != null && output.contains("UP");
+    }
+
+    /**
+     * Creates a new session with a given access information.
+     *
+     * @param sshInfo information to ssh to the remove server
+     * @return ssh session, or null
+     */
+    public static Session connect(SshAccessInfo sshInfo) {
+        try {
+            JSch jsch = new JSch();
+            jsch.addIdentity(sshInfo.privateKey());
+
+            Session session = jsch.getSession(sshInfo.user(),
+                                      sshInfo.remoteIp().toString(),
+                                      sshInfo.port().toInt());
+            session.setConfig(STRICT_HOST_CHECKING, DEFAULT_STRICT_HOST_CHECKING);
+            session.connect(DEFAULT_SESSION_TIMEOUT);
+
+            return session;
+        } catch (JSchException e) {
+            log.debug("Failed to connect to {} due to {}", sshInfo.toString(), e.toString());
+            return null;
+        }
+    }
+
+    /**
+     * Closes a connection.
+     *
+     * @param session session
+     */
+    public static void disconnect(Session session) {
+        if (session.isConnected()) {
+            session.disconnect();
+        }
+    }
+
+    /**
+     * Executes a given command. It opens exec channel for the command and closes
+     * the channel when it's done.
+     *
+     * @param session ssh connection to a remote server
+     * @param command command to execute
+     * @return command output string if the command succeeds, or null
+     */
+    private static String executeCommand(Session session, String command) {
+        if (session == null || !session.isConnected()) {
+            return null;
+        }
+
+        log.trace("Execute command {} to {}", command, session.getHost());
+
+        try {
+            Channel channel = session.openChannel("exec");
+            ((ChannelExec) channel).setCommand(command);
+            channel.setInputStream(null);
+            InputStream output = channel.getInputStream();
+
+            channel.connect();
+            String result = CharStreams.toString(new InputStreamReader(output));
+            channel.disconnect();
+
+            return result;
+        } catch (JSchException | IOException e) {
+            log.debug("Failed to execute command {} due to {}", command, e.toString());
+            return null;
+        }
+    }
+}