Brocade Communications Systems ServerIron ADX 12.4.00 Service Manual Page 23
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ServerIron ADX Advanced Server Load Balancing Guide 11
53-1002435-01
Configuring SIP SLB
1
SIP server health monitoring
There are two types of SIP servers of particular importance — SIP proxy servers and SIP registrar
servers. The ServerIron supports advanced UDP layer-7 application health checks for both server
types.
ServerIron switches can be enabled to send REGISTER or OPTION messages to SIP servers to track
their health. When an error-free response status (default is 200 OK) is received, then the
ServerIron marks the SIP server as being available, and starts assigning new SIP sessions to the
available servers.
The switches can also be configured to send health monitoring messages at user-defined
frequency and retrial attempts. Our unique system architecture allows a dedicated processor for
health monitoring and device management, which significantly increases the reliability and
efficiency of health monitoring and therefore improves the overall service availability. By default,
200 OK is considered a valid response code. Optionally, you can configure the switch to accept
other response codes that indicate a healthy and available server.
SIP messages with specific SIP methods are switched to the appropriate SIP server. As an example,
REGISTER messages are forwarded only to the SIP registrar server; whereas INVITE messages are
distributed among SIP proxy servers.
Configuring SIP SLB
Load Balancing SIP over UDP (Stateless SLB mode)
The following sections discuss SIP over UDP.
Configure a SIP proxy server and enable health check
Follow the steps given below to configure a real SIP proxy server and its health check.
1. Configure a real server and IP address for a proxy server and enter the real-server
configuration mode.
ServerIronADX(config)# server real proxy-server-1 1.1.3.1
Syntax: [no] server real <name> <ip address>
2. Specify the SIP port.
ServerIronADX(config-rs-proxy-server-1)# port sip
Syntax: [no] port sip
NOTE
You can specify SIP port number 5060 or the keyword SIP.
3. Specify a proxy-server and a health-check method with options.
ServerIronADX(config-rs-redirect-server-1)# port sip sip-proxy-server
health-check-method options
Syntax: port sip [sip-proxy-server] [health-check-method register|options]
[health-check-no-dsr]
- ServerIron ADX 1
- Document History 2
- Contents 5
- About This Document 9
- Command syntax conventions 10
- Notice to the reader 11
- Related publications 11
- Web access 12
- E-mail and telephone access 12
- SIP Server Load Balancing 13
- SIP terminology 16
- SIP message headers 17
- Max-Forwards 18
- Sample deployment topologies 19
- RINGING F4 21
- Configuring SIP SLB 23
- Configuring health check 26
- Example 29
- Load Balancing SIP over TCP 31
- Call-ID3 33
- Call-ID1 34
- Rehashing the SIP hash table 38
- Debug commands 40
- SIP SLB command reference 42
- Sample configuration 43
- Transparent Cache Switching 45
- Stateful caching 47
- Sample Deployment Topologies 48
- TCS with spoofing 49
- TCS with destination NAT 49
- TCS with Source NAT 50
- VIPs with reverse proxy 51
- Configuring TCS 52
- Defining a cache server 53
- Enabling TCS 56
- Other TCS options 57
- Cache Route Optimization 58
- Enabling Destination NAT 62
- Configuring Source NAT 62
- Examples 64
- Distribution algorithm 66
- • Maximum connection rate 72
- Enabling FastCache 73
- Enabling remote cache 73
- Shutting down a cache server 74
- Passive FTP for TCS 75
- Traffic flow of passive FTP 76
- Topologies supported 76
- High availability support 77
- ServerIron ADX 2 78
- Policy based caching 79
- Show commands 81
- Content aware cache switching 82
- Setting up the CSW policies 84
- Configuring the cache servers 85
- This field... Displays 91
- Displaying cache information 95
- TCS information (Continued) 96
- Sample configurations 98
- Applying IP policies 99
- Defining the caches 99
- Defining the cache groups 100
- 53-1002435-01 101
- Policy-based caching 102
- Asymmetric TCS (FastCache) 103
- Policy-based cache failover 105
- TCS with reverse proxy 107
- Layer 3 TCS 109
- Basic TCS configuration 110
- Commands for ServerIron ADX A 111
- Commands for ServerIron ADX B 112
- Internet 114
- 10.10.20.104 114
- 10.10.20.102 114
- Router NI1 117
- Router NI2 117
- OSPF Area 0 117
- Commands for Router NI2 121
- Active-standby TCS 125
- Configuring Router R1 126
- Configuring ServerIron ADX A 126
- Configuring ServerIron ADX B 127
- NetCache servers 128
- NetCache C720 cache server 128
- TABLE 9 Hashing methods 130
- Parsing the host string 133
- Force rehash 136
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