Hey guys --
I have a DS3 uplinked to Fortis Communications (which ups to cogent & yipes, ugh!) which has been pretty shakey. To avoid possible downtime, we purchased another drop from XSpedius, who is in our building, as a failover link. This has been installed and tested, but there are no customers on it. We will be implementing BGP4 in ~ 2 weeks, but in the interim I have a routing question.
We have 6 /24s through Fortis, 4 /24s through XSpedius and 3 more /24s that customers own. Fortis announces their own blocks as well as our 2 customer class Cs. XSpedius announces their own blocks. Hopefully we'll have our own ARIN assignment shortly. All of this is handled by a Cisco 7206.
The problem I have is that our default route right now is out through Fortis and I am concerned that if I add another default route (via XSpedius) traffic from the wrong blocks of IPs will start transiting the wrong network, which will really make things not work - for example, Customer A on Fortis IP addresses might get sent out the XSpedius link, making the traffic never go anywhere / come back.
The only thing I can think of is some sort of source routing, where the router somehow determines that if traffic sources from w.x.y.z/24 it should take this route.
I know this is the wrong way to do it (hence why there are no customers live on the new link), as I should really have another router in there to handle the new network, but finding out whether or not this can be done is gnawing at my brain.
Thanks!
Randal
I have a DS3 uplinked to Fortis Communications (which ups to cogent & yipes, ugh!) which has been pretty shakey. To avoid possible downtime, we purchased another drop from XSpedius, who is in our building, as a failover link. This has been installed and tested, but there are no customers on it. We will be implementing BGP4 in ~ 2 weeks, but in the interim I have a routing question.
We have 6 /24s through Fortis, 4 /24s through XSpedius and 3 more /24s that customers own. Fortis announces their own blocks as well as our 2 customer class Cs. XSpedius announces their own blocks. Hopefully we'll have our own ARIN assignment shortly. All of this is handled by a Cisco 7206.
The problem I have is that our default route right now is out through Fortis and I am concerned that if I add another default route (via XSpedius) traffic from the wrong blocks of IPs will start transiting the wrong network, which will really make things not work - for example, Customer A on Fortis IP addresses might get sent out the XSpedius link, making the traffic never go anywhere / come back.
The only thing I can think of is some sort of source routing, where the router somehow determines that if traffic sources from w.x.y.z/24 it should take this route.
I know this is the wrong way to do it (hence why there are no customers live on the new link), as I should really have another router in there to handle the new network, but finding out whether or not this can be done is gnawing at my brain.
Thanks!
Randal