Brocade Communications Systems ServerIron ADX 12.4.00 Service Manual Page 107
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ServerIron ADX Advanced Server Load Balancing Guide 95
53-1002435-01
Sample configurations
2
TCS with reverse proxy
TCS with reverse proxy relieves clients who have configured their web browsers to point to a proxy
server from the need to reconfigure their browsers. When you configure the ServerIron ADX for this
feature, the ServerIron ADX performs TCS for clients whose browsers do use a proxy and for clients
whose browsers do not use a proxy:
• For clients whose browsers do not use a proxy, the ServerIron ADX performs transparent TCS,
using the normal hash mechanism to map requests to a cache server based on the source and
destination information in the mask and the IP address of the requested site.
• For clients whose browsers use a proxy, the ServerIron ADX load balances the requests across
the cache servers. The clients are served transparently by a virtual IP address (VIP) that you
configure on the ServerIron ADX with the same IP address as the proxy. Although this is
different from the hash mechanism used for transparent TCS, the results for the client are
exactly the same. The ServerIron ADX sends the request to a cache server that either has the
requested content and sends it back to the client or does not have the requested content but
quickly obtains it from the Internet, then sends it back to the client. In addition, the hash
mechanism not only distributes traffic, but also ensures that duplication of content is
minimized. The hash mechanism minimizes duplication by ensuring that a particular web site
is always cached on the same cache server.
In either case, the ServerIron ADX provides the requested content to the client.
Figure 25 shows an example of a TCS configuration in which some clients have browsers
configured to use a proxy while other clients’ browsers are not thus configured.
FIGURE 25 Example Proxy Server Cache Load Balancing Configuration
Internet
Cache-Server1
209.157.22.26
Cache-Server2
209.157.22.27
SI
Client browers A, B, and C
do not use a proxy address.
RAS
BAR
AB
C
D
E
F
The ServerIron transparently switches
client requests for web site IP addresses
to a cache server based on the hash mask.
Client browsers D, E, and F
are configured to use proxy address
209.157.22.2
The ServerIron receives requests
from these clients on the VIP, which
is configured as the proxy server.
The ServerIron then load balances
the requests to the cache servers.
- 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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