Thanks for reading this post. I have a 2610 with S0/0 connected to a 1.5M frame-relay Internet T1 on a /30. The same provider gave us a /28 block of which the first usable is currently assigned to e0/0 and the second usable is set on the WAN side of a firewall/email appliance connected to e0/0. The customer's email MX record is pointed at the WAN side of the appliance. The customer installed a DSL including 5 static IP addresses with the idea of having an alternate back-up circuit available for Internet and email access in the event the Internet T1 dies. I spoke with the people hosting their MX record and they can set weighted addresses to send the mail to one address or another if one should fail to respond. How can I configure the 2610 to utilize the T1 for everything always except in the event the T1 dies, swing all Internet traffic to e0/1 set to one of the DSL statics? AND have the email routed inbound to the same firewall/email appliance WAN address? AND outbound email be routed out the DSL as well? AND switch back to the T1 when the T1 comes back up?
DNS Host:
send email to 12.1.1.2 /28
unless down then
send email to ?
ISP B ISP A
DSL router LAN 65.1.1.1 /29 |
| |
|-----------e0/1-- 2610 --s0/0
65.1.1.2 /29 |
|
e0/0 12.1.1.1 /28
|
firewall/email box WAN=12.1.1.2 /28
| LAN=192.168.1.1 /24
|
Local network
192.168.1.X
DNS Host:
send email to 12.1.1.2 /28
unless down then
send email to ?
ISP B ISP A
DSL router LAN 65.1.1.1 /29 |
| |
|-----------e0/1-- 2610 --s0/0
65.1.1.2 /29 |
|
e0/0 12.1.1.1 /28
|
firewall/email box WAN=12.1.1.2 /28
| LAN=192.168.1.1 /24
|
Local network
192.168.1.X