Static NAT on one ISP with default route on different ISP
We have one router with connections to two different ISPs. Static NATs are configured to servers using IPs from ISP A. The customer is migrating everything eventually to ISP B. At this moment, we want to make all outbound traffic flow through ISP B but keep the static NATs to the servers on ISP A.
default route - ISP B
server 1 static NAT ISP A
server 2 static NAT ISP A
server 3 static NAT ISP A
The problem is that once ISP B is the default route, the static NATs break. How do we get traffic meant for the servers that comes in ISP A to return through ISP A?
[toc:faq]The ProblemOn traditional switches whenever we have a trunk
interface we use the VLAN tag to demultiplex the VLANs. The switch needs
to determine which MAC Address table to look in for a forwarding
decision. To do this we require the switch to do...
[toc:faq]Introduction:Netdr is a tool available on a RSP720, Sup720 or
Sup32 that allows one to capture packets on the RP or SP inband. The
netdr command can be used to capture both Tx and Rx packets in the
software switching path. This is not a substitut...
IntroductionOSPF, being a link-state protocol, allows for every router
in the network to know of every link and OSPF speaker in the entire
network. From this picture each router independently runs the Shortest
Path First (SPF) algorithm to determine the b...