Automatic Interface Adapter Generation Methods using Interface BlendingDiagnosis Technologies

1
Automatic Interface Adapter Generation Methods
using Interface Blending/Diagnosis Technologies

• Yu Miyoshi,
• Tatsuyuki Kimura,
• Yoshihiro Otsuka
• NTT Network Service Systems Laboratories

2
Contents

• Introduction
• Issues in NMS development
• Interface blending/diagnosis
• Behavior of components
• Verification trials
• Conclusion

3
Interface adapters
Network management system
API
User interface
Application function
Interface
CLI
NE
Different vendor, different specification
4
An issue in NMS development
NMS development
NE development
Confirmation of specifications
Redesign
Redesign
Trial connection with NE
Start of service operation
5
Blending Diagnosis

• Creation from existing adapter (Blending)
• Query to the target NE (Diagnosis)

6
Adapter divided into three parts
! /usr/local/bin/expect log_user 0 set
timeout 5 set loginIP lindex argv 0 set
targetIfName lindex argv 1 set user lindex
argv 2 set loginPW lindex argv 3
append command "show ipv6 mld" spawn telnet
loginIP expect -re "Unknown
host" send_user " Unknown host " exit -1
-re "login " send "user\n"
timeout send_user " loginIP Login
Timeout \n exit -1 expect
-re "Password" send "loginPW\n"
exp_continue -re "(Error )."
send_user " loginIP Login Timeout \n" exit -1
-re "" send "terminal
pager off\n" expect -re "(Error
)." send_user " Command error " exit -1
timeout send_user " Timeout error
" exit -1 -re "" send
"command\n" expect -indices -re
(IPv6address)\\n\.\n\ (IPv6address)
send_user "expect_out(2,string),expect_out(
9,string)\n" -re "(Error )."
send_user " Command error " exit -1
timeout send_user " Timeout " exit -1
-re "" send "exit\n" close
7
Adapter divided into connections
! /usr/local/bin/expect log_user 0 set
timeout 5 set loginIP lindex argv 0 set
targetIfName lindex argv 1 set user lindex
argv 2 set loginPW lindex argv 3
append command "show ipv6 mld" spawn telnet
loginIP expect -re "Unknown
host" send_user " Unknown host " exit -1
-re "login " send "user\n"
timeout send_user " loginIP Login
Timeout \n exit -1 expect
-re "Password" send "loginPW\n"
exp_continue -re "(Error )."
send_user " loginIP Login Timeout \n" exit -1
-re "" send "terminal
pager off\n" expect -re "(Error
)." send_user " Command error " exit -1
timeout send_user " Timeout error
" exit -1 -re "" send
"command\n" expect -indices -re
(IPaddress)\\n\.\n\ (IPaddress)
send_user "expect_out(2,string),expect_out(9,s
tring)\n" -re "(Error )."
send_user " Command error " exit -1
timeout send_user " Timeout " exit -1
-re "" send "exit\n" close
8
Behavior of Blending
9
Calibration rules (example)

• Using just existing commands of other adapters
• Modifying existing commands
• ( e.g., show ip ospf interface -gt show ip
  interface ospf )
• Replacing defined equivalent words
• ( e.g., show ipv6 ospf interface -gt show
  inet6 ospf3 interface )

10
Behavior of Diagnosis
11
Verification trials
prototype system
Modify input scripts
Replace the target NE
Test network

• We verified the effectiveness of our proposal for
  adapters written by script language (Expect).
• 3 vendor NEs, 3 functions (9 Script files).
• 9 script files includes 44 conversations.

12
Results
First try
Second try
Conversations generated automatically
Conversations generated automatically
Target NE
Diagnosis success
Diagnosis success
Functions
1/2
4/5
2/2
5/5
Function 1
Vendor A
1/2
3/4
2/2
4/4
Function 2
1/2
2/4
2/2
4/4
Function 3
3/6
10/13
6/6
13/13
Subtotal A
1/2
5/6
2/2
6/6
Function 1
Vendor B
1/2
6/7
2/2
7/7
Function 2
1/2
5/6
2/2
6/6
Function 3
16/19
3/6
6/6
19/19
Subtotal B
3/4
4/4
1/2
2/2
Function 1
Vendor C
4/5
5/5
1/2
2/2
Function 2
3/3
3/3
1/1
1/1
Function 3
3/5
10/12
5/5
12/12
Subtotal C
Total
9/17 (53)
36/44 (82)
17/17 (100)
44/44 (100)
13
Conclusion

• We propose the interface blending/diagnosis
  technology.
• alleviates the effort of NMS development
• We tested a prototype system to confirm its
  feasibility.
• obtain effective responses for all commands
• depended on the number of stored patterns
  rules
• Further study completion way

14
Thank you.
Yu Miyoshi miyoshi.yu_at_lab.ntt.co.jp Tel
81-422-59-6748