master-SR Dhcp Relay with Stratum BMv2 switches

commit adbe515b452e501b2fa346071bfbba3c6c14706e (HEAD -] master, origin/master, origin/HEAD)
Author: Jian Li [pyguni@gmail.com]
AuthorDate: Tue Sep 22 11:23:29 2020 +0900
Commit: Jian Li [pyguni@gmail.com]
CommitDate: Tue Sep 22 12:26:12 2020 +0000

Fix: shorten the hostname unique string length from five to four
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(cherry picked from commit f4efdf58e3a8e2dcdfb2254c68c0323532e78898)

Case 1: DHCP v4 tests with 4 clients attached to switch directly and 1 server attached to switch directly, with 3 ONOS instances - PASS

• 1.1 Constructing test variables - PASS
• 1.2 Apply cell to environment - PASS
• 1.3 Uninstalling Atomix - PASS
• 1.4 Uninstalling ONOS package - PASS
• 1.5 Building ONOS Docker image - PASS
• 1.6 Create Cluster Config - PASS
• 1.7 Installing Atomix via docker containers - PASS
• 1.8 Installing ONOS via docker containers - PASS
• 1.9 Set up ONOS secure SSH - PASS
• 1.10 Starting ONOS CLI sessions - PASS
• 1.11 Checking ONOS nodes - PASS
• 1.12 Checking ONOS applications - PASS
• 1.13 Set logging levels - PASS
• 1.14 Set ONOS configurations - PASS
• 1.15 Starting Mininet Topology - PASS
• 1.16 Configure switches in ONOS - PASS
• 1.17 Verify host IP address assignment in ONOS - PASS
• 1.18 Verify IP address assignment from hosts - PASS
• 1.19 Stopping Mininet - PASS
• 1.20 Copying karaf logs - PASS

Case 2: DHCP v4 tests with 4 clients attached to switch directly and 1 server attached to switch indirectly (via gateway), with 3 ONOS instances - FAIL

• 2.1 Apply cell to environment - PASS
• 2.2 Uninstalling Atomix - PASS
• 2.3 Uninstalling ONOS package - PASS
• 2.4 Create Cluster Config - PASS
• 2.5 Installing Atomix via docker containers - PASS
• 2.6 Installing ONOS via docker containers - PASS
• 2.7 Set up ONOS secure SSH - PASS
• 2.8 Starting ONOS CLI sessions - PASS
• 2.9 Checking ONOS nodes - PASS
• 2.10 Checking ONOS applications - PASS
• 2.11 Set logging levels - PASS
• 2.12 Set ONOS configurations - PASS
• 2.13 Starting Mininet Topology - PASS
• 2.14 Configure switches in ONOS - PASS
• 2.15 Verify host IP address assignment in ONOS - FAIL
• Verify ONOS host IP failed
• 2.16 Verify IP address assignment from hosts - FAIL
• Verify network host IP failed
• 2.17 Stopping Mininet - PASS
• 2.18 Copying karaf logs - PASS

Case 21: DHCP v4 tests with tagged hosts: 4 clients attached to switch directly and 1 server attached to switch directly, with 3 ONOS instances - FAIL