> Well, that depends where his DNS servers are. If they are on, for > example, 192.168.2 then DNS traffic is routed through the public > interface. Public's don't allow clients so I have private's on the 192.168.1.0 network. > 2008/3/13 Bennie Thomas <Bennie_R_Thomas@xxxxxxxxxxxx>: >> I never use multiple routes. can cause you some grief. Make sure your >> /etc/hosts, /etc/resolv.conf, /etc/nsswitch.conf files. >> I use multiple networks currently and have no problems with the traffic >> going out the correct paths >> >> B >> >> >> splist@xxxxxxxxxxxx wrote: >> Guess I forgot to edit those IP's :). >> >> I thought you could only have one >> default gateway on a machine. >> I've never needed to deal with multiple nics >> other than bonded. >> >> PS: What does tab 1/2 mean? >> >> Mike >> >> >> On Thu, 13 Mar 2008 >> 13:39:25 -0700, Alex Kompel wrote: >> >> Google "linux policy based routing". >> >> In your example you just need to setup >> different gateways for both >> interfaces. For example: >> ip route add default >> via 69.2.237.57 dev eth0 tab 1 >> ip route add default via 192.168.1.1 dev eth1 >> tab 2 >> >> >> On Thu, Mar 13, 2008 at 9:23 AM, >> isplist@xxxxxxxxxxxx >> <isplist@xxxxxxxxxxxx> wrote: >> >> Is there a good document somewhere which explains in not too >> great >> technical >> terms how to use multiple nics on a system. I've been >> running bonded nics >> for >> many years but getting a machine to use two (or more >> networks) is still a >> mystery to me. >> >> For example, I have a VoIP machine >> which has two nics which I have >> problems >> with because I don't understand the >> above yet. >> >> This machine has a nic allows incoming VoIP/ZIP connections to >> it's >> public IP >> address on a T1. The router blocks everything but that >> traffic. >> >> Then it has a second nic which has a private IP on it to allow >> for >> management >> of the machine. Yet recently, it lost it's DNS, it can't seem >> to get >> access to >> DNS on it's own. I can force it to use DNS by typing ping >> commands a >> couple of >> times but it cannot do it on it's own to get it's >> updates for example. >> >> Basically, I need the machine to see it's public >> gateway at xx.x.237.59 to >> route it's VoIP/SIP traffic but I also need it to >> see it's private >> gateway at >> 192.168.1.0 so that it can use DNS and other >> internal services properly. >> >> route -n >> Kernel IP routing table >> Destination >> Gateway Genmask Flags Metric Ref Use >> Iface >> xx.x.237.56 0.0.0.0 >> 255.255.255.248 U 0 0 0 eth0 >> 192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 >> eth1 >> 169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 >> eth1 >> 0.0.0.0 69.2.237.57 >> 0.0.0.0 UG 0 0 0 >> eth0 >> >> ifconfig >> eth0 Link encap:Ethernet HWaddr >> 00:90:27:DC:4B:E6 >> inet addr:xx.x.237.59 Bcast:69.2.237.63 >> Mask:255.255.255.248 >> inet6 addr: fe80::290:27ff:fedc:4be6/64 Scope:Link >> UP >> BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 >> RX packets:33910280 errors:16 >> dropped:0 overruns:0 frame:16 >> TX packets:45988648 errors:0 dropped:0 >> overruns:0 carrier:0 >> collisions:24746 txqueuelen:1000 >> RX bytes:681966199 >> (650.3 MiB) TX bytes:1657358619 (1.5 GiB) >> >> eth1 Link encap:Ethernet HWaddr >> 00:13:20:55:D7:CE >> inet addr:192.168.1.102 Bcast:192.168.1.255 >> Mask:255.255.255.0 >> inet6 addr: fe80::213:20ff:fe55:d7ce/64 Scope:Link >> UP >> BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 >> RX packets:87417784 errors:0 >> dropped:0 overruns:0 frame:0 >> TX packets:70881957 errors:0 dropped:0 >> overruns:0 carrier:0 >> collisions:0 txqueuelen:1000 >> RX bytes:4171601084 (3.8 >> GiB) TX bytes:1547562481 (1.4 GiB) >> >> lo Link encap:Local Loopback >> inet >> addr:127.0.0.1 Mask:255.0.0.0 >> inet6 addr: ::1/128 Scope:Host >> UP LOOPBACK >> RUNNING MTU:16436 Metric:1 >> RX packets:6501004 errors:0 dropped:0 overruns:0 >> frame:0 >> TX packets:6501004 errors:0 dropped:0 overruns:0 >> carrier:0 >> collisions:0 txqueuelen:0 >> RX bytes:897257336 (855.6 MiB) TX >> bytes:897257336 (855.6 MiB) >> >> >> Mike >> >> >> On Wed, 12 Mar 2008 10:39:50 -0700, >> Alex Kompel wrote: >> >> You will still need some way to tell the system through which >> >> interface you >> want to route outgoing packets for each target. >> You can achieve the same >> with greater ease by splitting the network in >> 2 subnets and assigning each >> to a single interface. >> It all depends on the problem you are trying to >> solve. If you want >> redundancy - use active-passive bonding, you want >> throughput - use >> active-active bonding (if your switch supports link >> aggregation), if >> you want security and isolation - use separate >> subnets. >> >> -Alex >> >> 2008/3/12 Brian Kroth <bpkroth@xxxxxxxx>: >> >> This is a hypothetical, but what if you have two interfaces on >> the >> same >> network and want to force one service IP to one interface and >> the >> other >> to a different interface? I think what everyone is wondering is >> how >> much control one has over the service IP >> placement. >> >> Thanks, >> Brian >> >> Finnur Örn Guðmundsson - TM Software <fog@xxxx> >> 2008-03-12 14:36: >> >> >> Hi, >> >> I see no reason why you could not have 3 diffrent interfaces, >> each >> connected to the networks you are trying to serve the NFS >> requests >> to/from. RG Manager will add the floating interfaces to >> the >> "correct" >> interface, that is, if your floating ip is 1.2.3.4 and you >> have a >> interface with the IP address 1.2.3.3 he will add the IP to >> that >> interface. >> >> >> Bgrds, >> Finnur >> >> -----Original Message----- >> From: >> linux-cluster-bounces@xxxxxxxxxx [mailto:linux-cluster- >> bounces@xxxxxxxxxx] >> On Behalf Of gordan@xxxxxxxxxx >> Sent: 12. mars 2008 14:10 >> To: linux >> clustering >> Subject: Re: Two node NFS cluster serving >> multiple >> networks >> >> Sounds very similar to what I'm trying to achieve (see >> the other >> thread >> about binding failover resources to interfaces). I've not >> seen a >> response >> yet, so I'm most curious to see if you'll get >> any. >> >> Gordan >> >> On Wed, 12 Mar 2008, Randy Brown wrote: >> >> >> I am using a two node cluster with Centos 5 with up to date >> patches. >> We >> have >> three different networks to which I would like to serve nfs mounts >> from >> this >> cluster. Can this even be done? I have interfaces available >> for >> each >> network in each node? >> >> >> -- >> Linux-cluster mailing >> list >> Linux-cluster@xxxxxxxxxx >> https://www.redhat.com/mailman/listinfo/linux-cluster >> >> -- >> Linux-cluster >> mailing >> list >> Linux-cluster@xxxxxxxxxx >> https://www.redhat.com/mailman/listinfo/linux-cluster >> >> >> -- >> Linux-cluster mailing >> list >> Linux-cluster@xxxxxxxxxx >> https://www.redhat.com/mailman/listinfo/linux-cluster >> >> >> -- >> Linux-cluster mailing >> list >> Linux-cluster@xxxxxxxxxx >> https://www.redhat.com/mailman/listinfo/linux-cluster >> >> -- >> Linux-cluster mailing >> list >> Linux-cluster@xxxxxxxxxx >> https://www.redhat.com/mailman/listinfo/linux-cluster >> >> >> -- >> Linux-cluster mailing >> list >> Linux-cluster@xxxxxxxxxx >> https://www.redhat.com/mailman/listinfo/linux-cluster >> >> >> -- >> Linux-cluster mailing >> list >> Linux-cluster@xxxxxxxxxx >> https://www.redhat.com/mailman/listinfo/linux-cluster >> >> >> -- >> Linux-cluster mailing list >> Linux-cluster@xxxxxxxxxx >> https://www.redhat.com/mailman/listinfo/linux-cluster >> > > -- > Linux-cluster mailing list > Linux-cluster@xxxxxxxxxx > https://www.redhat.com/mailman/listinfo/linux-cluster -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
