Brocade Communications Systems ServerIron ADX 12.4.00 Service Manual Page 27
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ServerIron ADX Advanced Server Load Balancing Guide 15
53-1002435-01
Configuring SIP SLB
1
SIP stateless sample configuration
Load Balancing SIP over UDP (Stateful SLB mode)
This feature enhances the SIP feature by making it stateful and by adding necessary intelligence for
handling varying caller-id situations.
This feature has the following elements:
• SIP stateful support— Server selection is based on round robin persistent on user configured
key-header, such as Call-ID, and corresponding SIP sessions are created for this purpose.
• Persistence parameter can be extended— The persistence parameter can be extended to other
key header field, such as, VIA header. This applies to both SIP stateful and SIP stateless.
• Server initiated SIP requests handling— Sessions created so that subsequent transactions with
the same persistence parameter are directed to the same real server. This applies to SIP
stateful only. This enables the ServerIron to load-balance the B2BUA SIP servers.
• Support for fragmentated UDP support— Applies to both SIP stateful and SIP stateless.
• TCP SIP requests result in a TCP reset packet— According to RFC 3261, this will force sender to
retry the request using UDP. This applies to both SIP stateful and stateless.
• Redundancy support— SIP stateful supports both hot-standby and symmetric configuration by
synchronizing SIP sessions to peer box. Sym-active configuration is not recommended.
• SIP session created in ServerIron with multiple barrel processor are synched to all BPs.
SIP stateful basic configuration
1. Configure a Real Server
ServerIronADX(config)# server real rs 2.2.2.2
ServerIronADX(config)# port sip sip-proxy-server
ServerIronADX(config)# port sip sip-both-registrar-proxy-server
health-check-method register
2. Configure a Virtual Server
ServerIronADX(config)# server virtual-name-or-ip sip_vip 1.1.1.1
ServerIronADX(config)# port sip sip-stateful sip-keyfield-call-id
Syntax: [no] port sip sip-stateful [sip-keyfield-call-id |sip-keyfield-via]
ServerIronADX(config)# port sip sip-stateful
Syntax: [no] port sip sip-stateful
3. Bind Virtual Server to a Real Server
ServerIronADX(config)# bind sip rs sip
Additional SIP session-specific commands
The following global configuration commands are related to SIP load-balancing. They will affect all
virtual servers with statefull SIP load-balancing. This will not have any effect on the old stateless
SIP load-balancing. Stateless SIP load-balancing will still follow the hash table and ages
accordingly.
- 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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