Brocade Communications Systems ServerIron ADX 12.4.00 Service Manual Page 104
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92 ServerIron ADX Advanced Server Load Balancing Guide
53-1002435-01
Sample configurations
2
NOTE
Even when use the FastCache feature, the ServerIron ADX still performs a Layer 3 health check by
regularly pinging the cache server. In addition, you can continue to use HTTP health checking.
FIGURE 23 FastCache feature used for asymmetric topology
Here are the commands for configuring the ServerIron ADX for the topology shown in Figure 23. The
line that enables the FastCache feature is shown in bold.
ServerIronADX(config)# server cache-name cacheserver3 209.157.22.205
ServerIronADX(config-rs-cacheserver3)# asymmetric
ServerIronADX(config-rs-cacheserver3)# exit
ServerIronADX(config)# server cache-name cacheserver4 209.157.22.215
ServerIronADX(config-rs-cacheserver4)# exit
ServerIronADX(config)# server cache-name cacheserver5 209.157.22.225
ServerIronADX(config-rs-cacheserver5)# exit
This example assumes that the cache contains the contents requested by the client. However, if
the cache does not contain the requested page, the cache tries to get the page from the live web
site. In this case, the source address for the request is the IP address of the cache server, instead
of the IP address of the client. Moreover, this behavior can result in a loop from the cache server to
the RAS to the ServerIron ADX and back to the cache server.
Internet
www.stockquotes.com
1.0.0.2
www.oldnews.com
1.0.0.1
www.livenews.com
1.0.0.3
Web Servers
Border Access
Router (BAR)
e18 (output port)
e17
Remote Access
Server (RAS)
Web Queries
208.95.6.3
208.95.7.3
208.95.8.3
Cache server3
209.157.22.205
Cache server4
209.157.22.215
Cache server5
209.157.22.225
The ServerIron uses cache
responses from cache server 4
and cache server 5 for health
checking.
However, cache server 3
responds directly to the
RAS. Therefore, the
direct cache-server return
feature is used to disable
health checking based on
cache responses from cache
server 3.
SI
Cache interface 209.157.22.140.
A default route on this
interface directly to the CAR
bypasses the ServerIron.
- 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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