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Brocade Communications Systems ServerIron ADX manual available for free PDF download: Manual Manual
Brocade Communications Systems ServerIron ADX Manual Manual (267 pages)
Global Server Load Balancing Guide
Brand:
Brocade Communications Systems
| Category:
Switch
| Size: 2 MB
Table of Contents
Table of Contents
3
About this Document
9
Audience
9
Supported Hardware and Software
9
Document Conventions
9
Text Formatting
9
Notes, Cautions, and Danger Notices
10
Notice to the Reader
10
Related Publications
11
Getting Technical Help or Reporting Errors
11
Web Access
11
E-Mail and Telephone Access
11
Chapter 1 Global Server Load Balancing
13
Global Server Load Balancing Overview
13
Basic Concepts
14
GSLB Example
16
GSLB Policy
18
Active Bindings Metric
20
Minimum Required Configuration
25
Configuring GSLB
27
Proxy for DNS Server
29
Adding a Source IP Address
29
Configuring Real Server and Virtual Server for the DNS Server
30
Enabling the GSLB Protocol
31
Configuring a Site
31
Specifying Site Locations
32
Specifying GSLB Controller Locations
33
Configuring a Zone
33
Private Vips for GSLB
38
Configuring a Public IP Address for a VIP
39
Private VIP Display Information
40
Configuring GSLB Protocol Parameters
41
Secure GSLB
68
Initial Session Key Generation
69
RSA Challenge Dialogue
70
GSLB Message Content Randomization
70
Configuring Secure GSLB
70
Regenerating the Session Keys
75
Minimum GSLB Configuration
76
Site Persistence in GSLB Using Stickiness
76
Algorithm
77
Enabling Sticky GSLB
78
Allowing Sticky Sessions for a Specific Prefix Length
79
Configuring the Sticky GSLB Session Life Time
79
Displaying Current Sticky GSLB Sessions
80
Sticky GSLB Counters
81
Deleting Sticky GSLB Session for a Specific Client
82
Deleting All Sticky GSLB Sessions
82
Site Persistence in GSLB Using Hashing
82
Enabling Hash-Based GSLB Persistence
82
Displaying the Hash Table
82
Hashing Scheme
83
IP Address Allocation
84
IP Address Failure or Removal from Domain
84
Rehash: New IP Address for a Domain or Change of State
84
Disabling Rehash
85
Hash-Persist Hold-Down: Boot up Considerations if Rehash Disabled
86
Manually Forcing Rehash for a Domain
86
Show Commands
87
Weighted Distribution of Sites with Hash-Based Persistence
88
Overview of Distribution of Sites with Hash-Based Persistence
88
Configuring Distribution of Sites with Hash-Based Persistence
91
Configuring Weights for Domain IP Addresses
93
Disabling Rehash on Introduction of New IP Addresses or State Change from down to Healthy
93
Disable Rehash When Weight for an IP Is Changed
93
Displaying the Contents of Active RTT Cache Entries
96
Affinity
97
Defining the Affinity
98
Displaying RTT Prefix Cache Entries
99
Displaying Affinity Selection Counters
100
GSLB Domain-Level Affinity
100
Overview of GSLB Domain-Level Affinity
100
Command Line Interface
101
DNS Cache Proxy
103
Enabling DNS Cache Proxy
104
Displaying DNS Cache Proxy State
104
Displaying DNS Cache Proxy Statistics
105
Combining the DNS Cache Proxy and DNS Override Features
106
GSLB DNS Type any Query
106
Transparent DNS Query Intercept
107
Redirecting Queries
109
Redirecting Queries and Perform GSLB
111
Responding to Queries Directly
112
Displaying Transparent DNS Query Intercept Statistics
113
Enabling DNS Request Logging
114
Distributed Health Checks for GSLB
116
Configuration Examples
121
Dnssec
124
Verification with DIG
126
DNSSEC GSLB in DNS Proxy Mode
126
Configuring DNSSEC for GSLB
127
Displaying DNSSEC Configuration
128
Displaying DNSSEC Statistics
128
Host-Level Policies for Site Selection
129
Global Vs Host-Level Policy
129
Configuring Host-Level Policies
129
Displaying Host-Level Policy Information
137
Deleting GSLB Host-Level Policies
140
Configuration Example
140
Geographic Region for a Prefix
141
How Geographic Location Is Determined
141
Configuring a Geographic Prefix
142
Displaying the Number of Geographic Prefixes
143
Displaying Information about Geographic Prefix
143
Example Configuration
144
Smoothing Mechanism for RTT Measurements
145
Configuring Enhanced RTT Smoothing
146
Determining if the New RTT Smoothing Mechanism Is Enabled141
153
Round-Trip Times
153
Passive RTT Gathering
153
Active RTT Gathering
154
Support for both Active and Passive RTT
155
Active RTT Gathering Issues and Trade-Offs
156
Enabling Active RTT
156
Discarding Passive RTT
157
Disabling Passive RTT Gathering
157
Configuring Active RTT Parameters
158
Probes for RTT Gathering
161
Active RTT Gathering and High Availability Support
163
Displaying RTT Information
164
GSLB Affinity for High Availability
169
Configuring an HA Group
169
Enabling Dynamic Detection
170
Displaying HA Information
171
GSLB Optimization
174
Optimized VIP List Processing
174
Increased VIP Support Per Site and Reduced CPU Usage on GSLB Controller
174
Configuration Example
176
Guidelines and Recommendations for Using this Feature
177
Displaying GSLB Information
177
Displaying Site Information
177
Displaying Real Server Information
180
Displaying DNS Zone and Hosts
182
Displaying Metric Information
186
Displaying the Default GSLB Policy
187
Displaying the User-Configured GSLB Policy
189
Displaying RTT Information
190
Displaying GSLB Resources
192
Displaying Dynamic Server Information
193
Specifying the Source IP of Probes
196
Displaying Information in the Prefix Cache
196
SNMP Traps and Syslog Messages
198
Syslog Messages
199
Disabling and Re-Enabling Traps
200
GSLB Error Handling for Unsupported DNS Requests
200
Default Settings for GSLB Error Handling
201
Error Handling Response Format
202
Disable or Re-Enabling GSLB Error Handling
202
Configuring the Return Code
202
Viewing Error Handling Statistics
203
Clearing the Error Handling Statistics
203
Chapter 2 Global Server Load Balancing for Ipv6
205
Global Server Load Balancing for Ipv6 Overview
205
GSLB for Ipv6 Feature Support
206
GSLB for Ipv6 Example
207
Basic GSLB for Ipv6 Configuration
208
Configuring the GSLB Controller
209
Configuring Zones
210
Site Serveriron ADX Configuration
213
Basic Configuration Example
213
Advanced GSLB Configuration for Ipv6
215
Configuring GSLB Policy Metrics for Ipv6
216
Server (Host) Health Metric
220
Weighted IP Metric
221
Weighted Site Metric
223
Session Capacity Threshold Metric
225
Active Bindings Metric
226
Geographic Location Metric
228
Available Session Capacity Metric
230
Flashback Speed Metric
231
Administrative Preference Metric
232
Least Response Selection Metric
233
Round Robin Selection Metric
233
Sticky Persistence for Ipv6
234
Hash-Based Persistence for Ipv6
237
Weighted Hash-Based Persistence for Ipv6
238
Configuring DNS Response Parameters
241
GSLB of any Queries
242
Displaying GSLB for Ipv6 Configurations
243
Show Commands for Basic GSLB Configurations
243
Show Commands for Advanced Features
257
Troubleshooting GSLB for Ipv6 Configurations
258
Reference Materials
263
Appendix A Reference Materials
263
Rfc
263
Ipv4
263
Ipv6
263
Dns
263
Ipv6 Address Assignment
266
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