Forum Discussion
andy_12_5042
May 11, 2011Nimbostratus
LTM Bridge Versus Route Mode
I cant seem to find any good documents on the specific design of these 2 options with the LTM. I thought I understood both as I have been working for several years on F5's and have had 2 separate types of designs.
Can someone either point me to documentation that explains both options in detail or give a summary definition of both?
I have been in these 2 scenarios:
1) what I assumed is bridge. No forwarding servers and all the backend servers were using the floating ips as gateway. We were using SNAT
2) Route mode . Every Vlan had a virtual forwarding server in/out and all traffic was sent over a single L3 gateway on the LTM. On the router side, there were routes sending everything L3 to the LTM. The backend nodes used the LTM self-ips in same vlan as gateway. ( still using SNAT )
I have read a few a couple things that don't quite match this. I just want to get some clarity as I need to decide on a new design for a different network soon.
Thanks for any help
Andy
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- Andy,
- hmm ok interesting. So in my scenario 1, this was back in 9.2 days and its been a while since doing that.... So are you saying that you have to use forwarding servers no regardless? Thanks for the url reference , I will go ver that as well.
- Am I correct that node originated traffic (non-load balanced) would require a forwarding server to handle the outbound nat? I believe without this , for example if you assigned a snat pool at the vip level, the LB return traffic from server to client would work fine but server(LTM node) orginated traffic would not be nat'd outbound?
- Yes, you will need a forwarding virtual server in a routed mode, in order for non-load balanced traffic to "route through" the LTM. For server to go outbound, you will need a forwarding VS with SNAT automap turned on, or NAT set up for that particular node.
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