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44 ServerIron ADX Advanced Server Load Balancing Guide
53-1002435-01
Configuring TCS
2
Enabling TCS
When TCS is enabled, the feature detects web traffic addressed for output to the Internet and
redirects the traffic to the CPU, which processes the traffic and forwards it to the cache servers
instead. TCS can be defined on either a global or local basis as described:
globally – If TCS is enabled on a global basis, all ports redirect web traffic toward the cache
servers. Globally assigning TCS to all ports eliminates the need to individually configure ports
added in the future.
locally – If TCS is enabled on a local basis only web traffic that is outbound from a specified
ethernet port (or ports) will be directed toward the cache servers.
To enable TCS for HTTP traffic on all interfaces (globally) of the ServerIron ADX shown in Figure 9 on
page 34, enter a command such as the following.
NOTE
The command for enabling TCS is different if you are running a switch image or a router image on
the ServerIron ADX as shown.
When running a switch image
ServerIronADX(config)# ip policy 1 cache tcp 80 global
Syntax: ip policy <index> cache {tcp | udp} <portnum> { global | local }
When running a router image
ServerIronADX(config)# ip l4-policy 1 cache tcp 80 global
Syntax: ip l4-policy <index> cache {tcp | udp} <portnum> { global | local }
The <index> variable specifies the index value for the policy. This number can be any unused
number from 1 – 64. Thus, up to 64 IP policies can be defined on a ServerIron ADX. You can use
the show ip policy command to display the session policies that have been defined.
The <portnum> variable after TCP/UDP refers to the traffic which should be redirected to a cache
server.
Where the <portnum> variable is a non-wellknown-port
To enable caching for any traffic destined to a non-well-known port (>1024), do not include the
port number. Instead, configure a policy where the <portnum> variable is set to “0”. For
example, where you want to configure traffic to be redirected from port 8080 to a cache server,
the <portnum> variable will be set to “0” as shown in the following.
ServerIronADX(config)# ip policy 1 cache tcp 0 global
NOTE
In this configuration, the policy with a <portnum> variable of “0” only needs to be configured
once to support all non-well-known ports.
Where the global parameter is used, web traffic from all ports on the ServerIron ADX will be
redirected toward the cache servers.
Where the local parameter is used, only web traffic that is outbound from a configured ethernet
port will be directed to the cache servers. In this configuration, the ip policy command specifies
that TCS is enabled locally. You must then configure each port whose outbound traffic you want to
direct to the cache servers to use the previously configured ip policy.
- 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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