Can i have multiple default gateways
Where does the gateway send its non traffic? Just to be clear I did not setup this network, I am only trying to fix it, it works well but is buggy. The 10 network of machines is supposed to report its data to a SQL database over at our main Plant on the subnet.
Yet, no one can tell me how this is done since our router has access lists that block the and the 10 network from communicating with each other. And the Automation Engineer says the 10 network is a local network that doesn't need Internet access wtf. The automation engineers 10 network card has configured default GW of The network is what reaches the internet. This job has me questioning my sanity. Two gateways will not necessarily be a problem for a computer.
If each gateway is on a different subnet, that is perfectly fine. If both gateways are on the same subnet, that could cause issues for that computer. Do you have a network or bandwidth monitor?
You could use PRTG free up to sensors or Spiceworks NMS, which is free, to get a better understanding of the amount of traffic on the network devices. That will help to pinpoint the source. If you have RoAS running, that should connect to a trunk port on a switch. The Not sure if you have a DHCP 'server' running on the I'm wondering if there might be some broadcast storming going on Just one network connection, then the router should 'route' any packets destined for the If your If When this gateway fails, then use This applies only to TCP traffic and switching gateways occurs based on the mechanism described earlier.
Also consider where the two networks connected to Netcard1 and Netcard2 are disjointed that is, not connected to each other through any other router. If there's a network say To route IP datagrams destined to network To add the route, type the following command:.
Another possible solution for the above scenario is to run multiprotocol routing on the multihomed Windows NT computer so it can exchange routing information with other routers on the network running Routing Information Protocol. Multiprotocol routing is available in Windows NT 3. This can be done manually by running the commands in the batch file line by line in the command line.
Fill out my online form. The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Learn more. Can a PC have more than one Default Gateway?
Ask Question. Asked 9 years, 10 months ago. Active 1 year, 3 months ago. Viewed 91k times. Improve this question. The best way to do this is to put a higher route metric on one of the defaults. That works pretty well on both Windows and Linux. The route with the lower metric wins, until that interface goes down — Mike Pennington. I would really like to know what you're trying to accomplish with multiple default gateways.
Load balancing?? Perhaps there is a more specific underlying question. Add a comment. Active Oldest Votes. Technically yes, practically no. Hope this helps, and didn't make you too hungry Improve this answer. Chopper3 Chopper3 99k 9 9 gold badges silver badges bronze badges. What happens when you have two NICs, A and B, set a default gateway going out via A, and somebody starts a conversation with you via B?
I'm curious because I wrote an answer around this particular situation, and now I'm beginning to question it — user ArjunShankar then it transmits back using NIC B, simply because it knows about that route, the default route is only used when there's no direct route to a destination. Its good to point out though, that if you receive packets on B from a network you're not connected to it was ROUTED to you then you will get an asymmetric conversation because the destination network is not in the routing table and as such the replies will go to the default gateway.
If it's a straight route, it should work anyway, but if it's going through a stateful firewall anywhere it may get pissy with you — SpacemanSpiff.