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Problems with multiple ISP connections
My gateway has three connections with the following
information summary: ISP #1: Connects to: DSL modem Interface: vr0 /etc/rc.conf.isp1 Code:
... defaultrouter="122.53.x.x" ifconfig_vr0="DHCP" ifconfig_vr1="inet 203.160.x.x/24" ifconfig_fxp0="inet 192.168.0.1/24" ... Code:
... forwarders { 59.x.x.1; 59.x.x.2; }; ... ISP #2: Connects to: DSL modem Modem IP address: 192.168.1.1; Interface: vr1 /etc/rc.conf.isp2 Code:
... defaultrouter="203.160.x.x" ifconfig_vr0="DHCP" ifconfig_vr1="DHCP" ifconfig_fxp0="inet 192.168.0.1/24"... Code:
... forwarders { 202.138.x.50; 202.138.x.51; }; ... /etc/resolv.conf contains Code:
domain some.domain nameserver 127.0.0.1 from above. Whenever I want to switch connections, I run a script that basically does the following: Code:
route delete default ln -sf /etc/rc.conf.ispN /etc/rc.conf ln -sf /etc/named/named.conf.ispN /etc/named/named.conf ln -sf /etc/ipfw.rules.ispN /etc/ipfw.rules cp -p /etc/resolv.conf.base /etc/resolv.conf /etc/rc.d/natd restart /etc/rc.d/routed restart /etc/rc.d/named restart /etc/rc.d/routing restart /etc/rc.d/named restart /etc/rc.d/dhclient stop /etc/netstart sh /etc/ipfw.rules cp -p /etc/resolv.conf.base /etc/resolv.conf get my internet connection to work? Where have I erred? ISP connection #2 gives IP addresses from 192.168.1.2 and onwards. vr1 doesn't have an IP address associated with it as shown by the `ifconfig' output after switching to ISP2. I tried giving it an IP address by force, via Code:
ifconfig vr1 inet 192.168.1.2/24 Code:
ifconfig: ioctl (SIOCAIFADDR): File exists on a standalone FreeBSD installation with one NIC, and the connection works. I'm really stucked and I don't have a clue how to troubleshoot this. |
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I get the impression that ISP-1 asks you to use DHCP, while ISP-2 gives you a static IP address.
In the configuration of ISP-1 through vr0, which gets an address through DHCP, you assign a static IP address to vr11. In the configuration of ISP-2 through vr1, you assign IP addresses for both vr0 and vr1 via DHCP. Where is the static address assignment for vr1? Don't know if that is the problem Another possibility to use ISP-1 and ISP-2 would be to use pf and balance the traffic between these two ISP's. See http://www.openbsd.org/faq/pf/pools.html#outgoing for an example.
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You don't need to be a genius to debug a pf.conf firewall ruleset, you just need the guts to run tcpdump |
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The problem has already been fixed.
What happend was that I don't have a route to the second (vr1) connection. I checked the routing table and added the appropriate route. |
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