Sorry to raise up this thread again. Regarding to my last year problem was still unresolved due to multiple ISP implementation was postponed for a certain reason. However it has been continued started this year. I would explain briefly about my problem statement.
My company has 1 unit of ASA 5510 ver 7.2. This ASA has been running fine with one existing ISP (fix IP) being connected for all users. We have 1 unit of core switch Cisco Catalyst connected to ASA to work for the routing. Recently my company subscribe new ASDL line and want to port into existing network and intend to provide for only certain (users, vlans or subnets). This ASDL line comes with modem and PPPOE authentication username and password. I have already configured the ASA to meet the requirement and perhaps multiple ISP can be used together but I it seems got a little bit issue where targeted subnets was unable to route to the ASDL line. I attached here with the summary diagram of my current setup and sanitized configuration of ASA. Really appreciate any comments on this. I have been looking forward to solve the issue for almost 3 weeks.
ASA Version 7.2(3)
name 172.31.0.0 All_Subnet
name 172.31.15.0 ADSL_Subnet
interface Ethernet0/0
description *Metro-E*
nameif Outside
security-level 0
ip address 200.100.10.34 255.255.255.224
ospf cost 10
interface Ethernet0/1
description *LAN Gateway*
nameif Inside
security-level 100
ip address 172.31.3.254 255.255.255.248
ospf cost 10
interface Ethernet0/2
description DMZ interface
nameif DMZ
security-level 50
ip address 172.31.2.1 255.255.255.224
ospf cost 10
interface Ethernet0/3
description *Unifi Gateway*
nameif Unifi
security-level 0
pppoe client vpdn group UNIFI
ip address pppoe setroute
interface Management0/0
nameif management
security-level 100
ip address 192.168.1.1 255.255.255.0
ospf cost 10
management-only
access-list outside_access_in_unifi extended permit icmp any any echo-reply
access-list outside_access_in_unifi extended permit icmp any any echo
mtu Outside 1500
mtu Inside 1500
mtu DMZ 1500
mtu management 1500
mtu Unifi 1492
global (Outside) 1 200.100.10.35-200.100.10.45 netmask 255.255.255.0
global (Inside) 1 200.100.10.42 netmask 255.255.255.0
global (Unifi) 2 interface
nat (Outside) 1 172.31.3.0 255.255.255.240 outside
nat (Inside) 2 ADSL_Subnet 255.255.255.0
nat (Inside) 1 All_Subnet 255.255.0.0 dns
static (Inside,Outside) 200.100.10.61 172.31.3.2 netmask 255.255.255.255 dns
access-group outside_access_in in interface Outside
access-group Inside_access_in in interface Inside
access-group Inside_access_out out interface Inside
access-group DMZ_to_inside in interface DMZ
access-group outside_access_in_unifi in interface Unifi
route Outside 0.0.0.0 0.0.0.0 200.100.10.33 1
route Inside All_Subnet 255.255.0.0 172.31.3.253 1
vpdn group UNIFI request dialout pppoe
vpdn group UNIFI localname abcd@unifi
vpdn group UNIFI ppp authentication pap
vpdn username abcd@unifi password *********
policy-map global_policy
class inspection_default
inspect dns preset_dns_map
inspect ftp
inspect h323 h225
inspect h323 ras
inspect rsh
inspect rtsp
inspect esmtp
inspect sqlnet
inspect skinny
inspect sunrpc
inspect xdmcp
inspect sip
inspect netbios
inspect tftp
inspect icmp
