1. SIP LBA

2. Fast Quiz
What is the function of the LBA in the NW Architecture ?
SIP Load Balancing
How many VLAN does the Network Architecture use ?
Two SIP and RTP
I consider replacing the LBA with Media GW/Gatekeeper/SBC ,What
might work ?
Session Border Controller
The LBA is down , what will happen
No new calls, Existing call will not disconnect
How many interfaces the LBA is using
Two - SIP Internal and SIP External

3. Network Architecture
VoIP NW
RTP SIP
RTP SIP
LBA Radware AS-I/AS-II LBA Radware AS-I/AS-II
Web Server Director Web Server Director
RSTP/STP
LN
CO
10
PWR 1 3 5 7
FD
0
K
L
LN
CO
10
PWR 1 3 5 7
FD
0
K
L
2 4 6 8
AC
HD
Tx
Rx
RESET SYSOK 1 1 2
T
2 4 6 8
AC
HD
Tx
Rx
RESET SYSOK 1 1 2 1 2 3 4 5 6 7 8
T
1 2 3 4 5 6 7 8
SIP SIPSIP
1 3 5 7 9 11 13 15 17 19 21 23
Catalyst 2950 SERIES 1 3 5 7 9 11 13 15 17 19 21 23
Catalyst 2950 SERIES
1 2 1 2
SYST RPS SYST RPS
STRT UTIL DUPLXSPEED STRT UTIL DUPLXSPEED
MODE 2 4 6 8 10 12 14 16 18 20 22 24 2 4 6 8 10 12 14 16 18 20 22 24
MODE
Switch(2950/4948) Switch(2950/4948)
SIP RTP
CMS HMP
Secure Zone Secure Zone

4. Software
• LBA SW Ver 8.23.06c Comverse SIP version
• Future Ver AppDirector 1.06
• Cisco 2960 is using 121-22.EA6
• Cisco 4948 is using 122-25.EWA12

5. Hardware
• Radware As-I with 256MB Ram Memory
• 8 FE and 2 GBIC
• Radware AS-II with 256 MB Ram Memory
• 16 FE and 5 GBIC
• Cisco DMZ SW L2 2950 Default
• 24 FE ports + 2 GE
• Alternatively Cisco 4948 – 48GE L3
• CMS HMP using 4 NICs (LAN Ports)
• 2 for RTP only
• 2 for SIP and DMZ<->SZ

6. Performance (Aging 900 sec)
• Radware As-I with 256MB Ram Memory
• 200 new Call per second
• Radware AS-II with 256 MB Ram Memory
• 250 new Call per second

7. LBA – Configuration OverView
 One Farm
 VRRP – High Availability
 Health Monitoring and not connectivity check
 Layer 7 UDP Load Balancing
• Call-ID Header Tracking
• Hashing
• Persistency
Incase of Failover the same Call-ID will reach the same Server
 Local Triangulation Mode
• No layer-3 change
• MAC Replacing
• Loop Back IP of the servers Must be identical to the Farm VIP
 Server NAT
• Use the same IP of the Farm/Loopback IP

8. Loopback Interface
 SIP App is Bind to the Loopback IP
 LBA is sending SIP Traffic to the Server’s Loopback IP

9. SIP Health Monitor
 Checking Server Availability
• Health Monitor
 Sending SIP Options
 Transport Layer UDP Port 5060
 Awaits a response of 200 OK from the Server

10. SIP Health Monitor - Example
Server MAC
UDP 5060 (Local Triangulation)
LBA Internal Loopback IP
Interface
SIP Options

11. SIP Health Monitor – Example Cont.
Server
Response
200 OK

12. Farm - Parameters
•Farm Parameters
•IP Address 10.1.2.9
•Farm Name (-n) VOIP-SIP5060
•Admin Status (-as) Enable
•Client Aging Time (-at) 60
•Dispatch Method (-dm) Hashing
•Connectivity Method (-cm) Disable
•Sessions Mode (-sm) RemoveOnSessionEnd-SPS
•Redundancy Mode (-fm) Primary / Backup
• Extended Farm Parameters
•SIP port (-sip) 5060

13. Health-Check Parameters
•Health Check Parameters
•Check Name CHK-CMS1
•Method (-m) SIP UDP
•Destination (-d) 10.1.2.9 (Farm IP)
•Next HOP (-h) 172.17.4.11 (Server IP)
•Port (-p) 5060 (SIP Port)
•Interval (-i) 10
•Retries (-r) 3
•Timeout (-t) 3
•Arguments (-a), Listed below
•URI 10.1.2.9 (Farm IP)
•FROM 172.17.4.6 (Interface IP)
•Forward 70
•C1 200

14. Persistency Parameters
•Persistency Parameters
•Farm IP 10.1.2.9 (Farm IP)
•Port 5060
•Protocol UDP
•Key (-k) Call-ID
•Timeout (-t) 1800 seconds
•Lookup Mode (-l) Header
•Learning Direction (-d) Both Directions

15. Configuration Methods
 Console
 Configware Insite
 WEB

16. Important Debug Commands
 System device-info

17. Important Debug Commands Cont.
 net ip-interface

18. Important Debug Commands Cont.
 net route table

19. Important Debug Commands Cont.
 wsd farm table

20. Important Debug Commands Cont.
 wsd farm server table

21. Important Debug Commands Cont.
 Health-monitoring check

22. Important Debug Commands Cont.
 Health-monitoring binding

23. Important Debug Commands Cont.
 System internal wsd session-id-info

24. Summary