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ServerIron ADX Advanced Server Load Balancing Guide 57
53-1002435-01
Other TCS options
2
Configuring an increased hash bucket count
You can set the size of the TCS hash bucket count to a value from 256 to 16384 using the following
system-max command.
ServerIronADX(config)# system-max tcs-hash-table-size 2048
Syntax: [no] system-max tcs-hash-table-size <hash-table-size>
The hash-table-size variable specifies the size that you want to configure the hash table.
Acceptable values are: 256, 512, 1024, 2048, 4096, 8192 and 16384. Entering a value for this
variable other than those described will cause an error message to be displayed. The default value
is 256.
NOTE
The hash table size will only be effective after saving the configuration using the write mem
command and reloading the ServerIron ADX.
Displaying the hash values per BP
You can display the hash values for a specific Source and Destination IP pair. The output first
displays the current hash table size, then the hash value which is the bucket number for the given
Destination and Source IP addresses. If a cache server is selected for this bucket, the selected
cache server name is displayed and if no cache server is selected for this bucket yet, "empty" is
displayed. Examples are shown in the following.
ServerIronADX1/1# show cache-hash 1 1.2.3.4 192.168.1.1
Cache-group 1: Hash table size: 512
Hash_info: Dest_mask = 255.255.255.255 Src_mask = 0.0.0.0
bucket#: 38 -> cs1
ServerIronADX1/1# show cach-hash 1 1.2.3.4 192.168.1.1
Cache-group 1: Hash table size: 512
Hash_info: Dest_mask = 255.255.255.255 Src_mask = 0.0.0.0
bucket#: 39 -> empty
Syntax: show cache-hash <cache-group> <destination-IP> <source-IP>
NOTE
This command is available at the BP console only.
NOTE
The hash table is not synced between ServerIron ADX switches for both Hot-Standby and
Active-Active mode.
Enabling cache server spoofing support
In TCS, when a client makes a request for HTTP content on the Internet, the ServerIron ADX directs
the request to a cache server, rather than to the Internet. If the requested content is not on a cache
server, it is obtained from an origin Web server on the Internet, stored on a cache server to
accommodate future requests, and sent from the cache server back to the requesting client.
- 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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