Brocade Communications Systems ServerIron ADX 12.4.00 Service Manual Page 63
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ServerIron ADX Advanced Server Load Balancing Guide 51
53-1002435-01
Other TCS options
2
However, if the time since the last packet the ServerIron ADX sent to the cache server and the
cache server’s response increases significantly, or the cache server’s reply never reaches the
ServerIron ADX but instead takes an alternate path to the client, the ServerIron assumes that the
cache server has stopped responding. When this occurs, the ServerIron ADX marks the cache
server FAILED and stops redirecting client queries to the cache server.
You can ensure that cache server replies always pass back through the ServerIron ADX by
configuring Source NAT.
FIGURE 11 Using Source NAT with TCS
In this example, the ServerIron ADX and cache server are connected by a router and are in different
sub-nets. In a topology where the cache server’s response is guaranteed to pass back through the
ServerIron, you may not need to configure Source NAT. However, if the cache server’s reply can
reach the client by a path that does not pass through the ServerIron, you need to configure Source
NAT.
To configure Source NAT:
• Enable the Source NAT feature. You can enable the feature at the cache group level for all
cache servers or at the cache server level for individual servers.
• Configure a source IP address. A source IP address allows the ServerIron ADX to be a member
of more than one sub-net. If the cache server and ServerIron ADX are in different sub-nets,
configure a source IP address that is in the cache server’s sub-net.
To enable Source NAT globally for all cache servers and configure a source IP address, enter
commands such as the following:
ServerIronADX(config)# server source-ip 10.10.10.5
Cache Server C1
10.10.10.2
Internet
Management IP address 141.149.65.10
Source IP address 10.10.10.5
Source NAT enabled
SI
141.149.65.1
141.149.65.20
10.10.10.10
- 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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