diff options
| author | Nilton Moura <nmoura@nmoura.eti.br> | 2010-09-10 09:57:26 -0400 |
|---|---|---|
| committer | dsomero <xgizzmo@slackbuilds.org> | 2010-09-10 09:57:26 -0400 |
| commit | b4d4b7b05dc7dcaf073c1317b14d9a2ecb29ce54 (patch) | |
| tree | 3ddf1a5508eac2109f699cfd1aa1926709b90fc8 /network/vrrpd/README | |
| parent | 9d32da8f9923d608c23e040f44c1971b9a57dcfe (diff) | |
network/vrrpd: Added (Virtual Router Redundancy Protocol)
Signed-off-by: dsomero <xgizzmo@slackbuilds.org>
Diffstat (limited to 'network/vrrpd/README')
| -rw-r--r-- | network/vrrpd/README | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/network/vrrpd/README b/network/vrrpd/README new file mode 100644 index 000000000000..9dbf7a280e9b --- /dev/null +++ b/network/vrrpd/README @@ -0,0 +1,34 @@ +VRRP daemon (vrrpd) is an RFC 2338 compliant implementation of the +Virtual Router Redundancy Protocol (VRRP). The Virtual Router Redundancy +Protocol is designed to eliminate the single point of failure associated +with statically routed networks by automatically providing failover using +multiple LAN paths through alternate routers. + +As specified in RFC 2338, VRRP uses an election protocol that dynamically +assigns responsibility for a virtual router to one of the VRRP routers on +a LAN. When a VRRP router controls the IP address(es) associated with a +virtual router, it is called the Master. The Master continues to forward +packets sent to these IP addresses until it has a problem that causes the +VRRP routers to hold an election. The election process provides dynamic +failover by electing a new Master should the existing Master become +unavailable. + +The virtual router associated with each alternate path under VRRP uses the +same IP address and MAC address as the routers for other paths. As a result, +the host's gateway information does not change, no matter what path is used. +Because of this design, VRRP-based redundancy significantly reduces +administrative overhead when compared to redundancy schemes that require +hosts to be configured with multiple default gateways. + +The primary function of the Virtual Router Redundancy Protocol is to provide +routing redundancy for specific IP addresses. In addition to this primary +function, RFC 2338 also states that the protocol should: + + * Minimize the duration of black holes. + * Minimize the steady state bandwidth overhead and processing complexity. + * Function over a variety of multiaccess LAN technologies that support IP + traffic. + * Provide for election of multiple virtual routers on a network for load + balancing. + * Support multiple logical IP subnets on a single LAN segment. + |