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Common Address Redundancy Protocol: OpenBSD, FreeBSD, Gateway Load Balancing Protocol
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Dieser Artikel gilt, aufgrund seiner Grösse, beim Versand als 2 Artikel!
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| Please note that the content of this book primarily consists of articles
available from Wikipedia or other free sources online. The Common
Address Redundancy Protocol or CARP is a protocol which allows multiple
hosts on the same local network to share a set of IP addresses. Its
primary purpose is to provide failover redundancy, especially when used
with firewalls and routers. In some configurations CARP can also provide
load balancing functionality. It is a free, non patent-encumbered
alternative to CISCO's HSRP, implemented mostly in BSD operating
systems. If there is a single computer running a packet filter, and it
goes down, the networks on either side of the packet filter can no
longer communicate with each other, or they communicate without any
packet filtering. If, however, there are two computers running a packet
filter, running CARP, then if one fails, the other will take over, and
computers on either side of the packet filter will not be aware of the
failure, so operation will continue as normal. In order to make sure the
new master operates the same as the old one, pfsyncd is used to
synchronize packet filter states. |
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i.d.R. innert 7-14 Tagen versandfertig
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