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Linux 上的冗余路由（主动/备份）

tag-icon • tag-icon linux routing failover redundancy
Linux 上的冗余路由（主动/备份）

我目前正在尝试在 RHEL 5 上设置冗余路由。目标是拥有到子网的主路由和到该子网的备份路由，仅当主路由的网关不可达时才使用。

知道如何实现吗？与标准 RHEL 文件的集成是一个优点 :)

提前致谢，

答案1

您可以使用 quagga 和 OSPF

# yum info quagga
Loaded plugins: changelog, fastestmirror, presto, security, versionlock
Loading mirror speeds from cached hostfile
 * base: ftp.colocall.net
 * epel: ftp.colocall.net
 * extras: ftp.colocall.net
 * ius: ius.cu.be
 * rpmforge: ftp.colocall.net
 * updates: ftp.colocall.net
Available Packages
Name        : quagga
Arch        : x86_64
Version     : 0.99.15
Release     : 7.el6_3.2
Size        : 1.1 M
Repo        : base
Summary     : Routing daemon
URL         : http://www.quagga.net
License     : GPLv2+
Description : Quagga is a free software that manages TCP/IP based routing
            : protocol. It takes multi-server and multi-thread approach to resolve
            : the current complexity of the Internet.
            :
            : Quagga supports BGP4, BGP4+, OSPFv2, OSPFv3, RIPv1, RIPv2, and RIPng.
            :
            : Quagga is intended to be used as a Route Server and a Route Reflector. It is
            : not a toolkit, it provides full routing power under a new architecture.
            : Quagga by design has a process for each protocol.
            :
            : Quagga is a fork of GNU Zebra.

并为每个网关使用不同的权重（成本）

router1.example.net# conf t
router1.example.net(config)# int tun0
router1.example.net(config-if)# ip ospf authentication message-digest
router1.example.net(config-if)# ip ospf message-digest-key 1 md5 SHdJLapbQ1
router1.example.net(config-if)# ip ospf cost 10
router1.example.net(config-if)# write
Configuration saved to /etc/quagga/ospfd.conf

router1.example.net# conf t
router1.example.net(config)# int tun1
router1.example.net(config-if)# ip ospf authentication message-digest
router1.example.net(config-if)# ip ospf message-digest-key 1 md5 SHdJLapbQ1
router1.example.net(config-if)# ip ospf cost 20
router1.example.net(config-if)# write
Configuration saved to /etc/quagga/ospfd.conf

答案2

哇，太酷了，我以前从来没听说过 quagga。我会用老办法，编写脚本，然后用 cron 运行它 :)（非常笨拙）

类似于先创建两个文件。

# cat /root/route1.txt
1.1.1.1
# cat /root/route2.txt
2.2.2.2

然后像 cron 中的这个脚本一样（或者在“while true”循环中）

#!/bin/bash

route1=`cat /root/route1.txt`
route2=`cat /root/route2.txt`

$status=`ping -n -c 1 -q $route1 | grep -c "1 received"`
if [ "$status" == "1" ]; 
then 
    echo "good stuff" > /dev/null
else 
    echo "bad stuff" > /dev/null
    route del [rest of command to delete current default $route1]
    route add default gateway $route2
    echo "$route1" > /root/route2.txt
    echo "$route2" > /root/route1.txt
fi

就像我说的，很笨拙吧？:)

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