ExtremeWare Software 7.3.0 Command Reference Guide
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9
SLB Commands
This chapter discusses server load balancing (SLB) and flow redirect commands.
SLB transparently distributes client requests among several servers. The main use for SLB is for web
hosting (using redundant servers to increase the performance and reliability of busy websites).
You can use SLB to manage and balance traffic for client equipment such as web servers, cache servers,
routers, and proxy servers. SLB is especially useful for e-commerce sites, Internet service providers, and
managers of large intranets.
SLB also provides health checking. Health checking allows you to actively poll nodes to determine their
health. The switch makes new connections only if the virtual server and node are both enabled and
passing health checks. The switch considers a virtual server or node active unless a health check fails. If
a health check fails, the switch considers the virtual server or node inactive. A virtual server or node is
also considered inactive if it is disabled and has zero active connections.
Flow redirect overrides routing decisions to transparently redirect client requests to a target device (or
group of devices). Unlike SLB, you do not duplicate content on the target device(s).
The switch can only redirect traffic that crosses a VLAN boundary, because flow redirect operates at
layer 3. Flow redirection examines traffic and redirects it based on the following criteria, in order of
priority:
1
Destination IP address and mask
2
Layer 4 port
3
Source IP address and mask
You can use flow redirect for the following:
•
Web cache redirection
•
Policy-based routing
Содержание ExtremeWare 7.3.0
Страница 54: ...54 ExtremeWare Software 7 3 0 Command Reference Guide Contents...
Страница 104: ...104 ExtremeWare Software 7 3 0 Command Reference Guide Commands for Accessing the Switch...
Страница 378: ...378 ExtremeWare Software 7 3 0 Command Reference Guide FDB Commands...
Страница 418: ...418 ExtremeWare Software 7 3 0 Command Reference Guide QoS Commands...
Страница 436: ...436 ExtremeWare Software 7 3 0 Command Reference Guide NAT Commands...
Страница 600: ...600 ExtremeWare Software 7 3 0 Command Reference Guide SLB Commands...
Страница 968: ...968 ExtremeWare Software 7 3 0 Command Reference Guide Security Commands...
Страница 1002: ...1002 ExtremeWare Software 7 3 0 Command Reference Guide EAPS Commands...
Страница 1126: ...1126 ExtremeWare Software 7 3 0 Command Reference Guide ESRP Commands...
Страница 1392: ...1392 ExtremeWare Software 7 3 0 Command Reference Guide IGP Commands...
Страница 1478: ...1478 ExtremeWare Software 7 3 0 Command Reference Guide BGP Commands...
Страница 1556: ...1556 ExtremeWare Software 7 3 0 Command Reference Guide IP Multicast Commands...
Страница 1600: ...1600 ExtremeWare Software 7 3 0 Command Reference Guide IPX Commands...
Страница 1616: ...1616 ExtremeWare Software 7 3 0 Command Reference Guide ARM Commands...
Страница 1694: ...1694 ExtremeWare Software 7 3 0 Command Reference Guide PoS Commands...
Страница 1750: ...1750 ExtremeWare Software 7 3 0 Command Reference Guide T1 E1 and T3 WAN Commands...
Страница 1856: ...1856 ExtremeWare Software 7 3 0 Command Reference Guide MPLS Commands...
Страница 1898: ...1898 ExtremeWare Software 7 3 0 Command Reference Guide High Density Gigabit Ethernet Commands...
Страница 1938: ...1938 ExtremeWare Software 7 3 0 Command Reference Guide Power Over Ethernet Commands...
Страница 1988: ...1988 ExtremeWare Software 7 3 0 Command Reference Guide H VPLS Commands...
Страница 2106: ...2106 ExtremeWare Software 7 3 0 Command Reference Guide Wireless Commands...
Страница 2132: ...2132 ExtremeWare Software 7 3 0 Command Reference Guide Configuration and Image Commands...
Страница 2236: ...2236 ExtremeWare Software 7 3 0 Command Reference Guide Troubleshooting Commands...
Страница 2254: ...2254 ExtremeWare Software 7 3 0 Command Reference Guide Index of Commands...