07-17-2007 01:19 PM - edited 03-03-2019 05:54 PM
Hi,
I have a pool of IP address to reach my ISP
ip route 0.0.0.0 0.0.0.0 200.14.145.13
ip route 0.0.0.0 0.0.0.0 200.15.128.26
ip route 0.0.0.0 0.0.0.0 200.110.123.140
ip route 0.0.0.0 0.0.0.0 200.110.109.14
ip route 0.0.0.0 0.0.0.0 200.109.115.7
all of them are FR conecctions.
1. How can I make load balancing between all my interfaces? because when I use only one static route evrything works ok, but if I add the second and the third it doesn't work.
all my interfaces are configured like this:
description Circuito 8151-0012462
bandwidth 1920
ip address 200.xxx.xxx.xxx 255.255.255.252
encapsulation frame-relay IETF
no ip mroute-cache
load-interval 30
serial restart-delay 0
fair-queue
frame-relay interface-dlci 516
frame-relay lmi-type ansi
there is not IP address problems etc, is a matter of routing do I have a NAT or any special configuration on my router to make it work?
Thanks
Regards
Leo
07-17-2007 01:27 PM
Yes, unless you have BGP with your own AS, you need NAT to load balance over all these connections. If this is acceptable for you, decide how you want to "partition" your internal address to go out and use the different connections. If all the address can use all the exit interfaces, just configure the same nat statement like
"ip nat source inside list 101 interface x/y.z overload" multiple times in addition to "ip nat inside" and "ip nat outside" and the access-list 101 that defines traffic to be natted.
Hope this helps, please rate post if it does!
07-17-2007 01:31 PM
Hi bevilaqua thanks for your reply can you give an specific nat example of how can I do it please
07-17-2007 01:50 PM
Paolo
My first thought was also that NAT/PAT was needed. But in the original post Leo says that when using a single address/single route that everything works ok. If it works ok out a single interface how could it be a NAT/PAT issue?
Perhaps Leo can give us some additional details about the addressing plan used in his network and how that relates to the addressing of his provider.
HTH
Rick
07-17-2007 01:58 PM
Well, it may be that he has another NAT device behind the router, so when it goes out of "right" interface it works, but not with the others.
Definitely more details are needed as it seems peculiar one has that many interfaces and is not clear if to the same or different ISPs.
07-18-2007 05:15 AM
Well is only one ISP.
I mean when I use one static route to acces tne internet I have no problem but If I add a second one it doesn't work properly.
I do not have any device doing NAT. I get all my conection FR from ISP directly to my router. The ip address on my serial interfaces have mask /30.
My goal is to be able to route the internet traffic over my 5 serial interfaces with my 5 static routes.
Thank a lot
Regards
07-18-2007 05:49 AM
Perhaps you can clarify a bit about what is happening. When you say that a single static route works fine, is it a particular static route that you are using, or are you saying that if you use the first one by itself it is fine, or if you use the second one by itself it is fine, or if you use the third one by itself it is fine, and so on?
HTH
Rick
07-18-2007 06:02 AM
exactly rburst if I use the first one by itself it is fine, the second one by itself it is fine, and so on, but when I try to use more than one at the same time it becomes slow and I loose the connection to the internet.
Example:
with a single static route (It could be any of five FR)I have no problem
ip route 0.0.0.0 0.0.0.0 200.209.254.21
But adding a second one
ip route 0.0.0.0 0.0.0.0 200.209.254.21
ip route 0.0.0.0 0.0.0.0 200.44.110.164
...
...
Then It doesn't work
Thanks
07-18-2007 06:24 AM
Well that is a very strange situation. When you have two static routes like that it should put outbound traffic on both. Normally that would not be a problem. Are you doing anything on your router that would cause per packet load sharing? I wonder if the provider could be doing some kind of stateful inspection that would have a problem with assymetric traffic?
HTH
Rick
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