04-28-2009 03:55 AM - edited 03-04-2019 04:33 AM
I have configured 2 Dialer interfaces on the router as i have 2 internet lines from the same ISP that i want to connect them both to the same router. The problem happens when i enable dialers at the same time the internet traffic becomes unstable up and down.
04-28-2009 04:02 AM
Hello Karam,
I would suggest you to post your configuration just hide public ip addresses and userame and passwords.
In this way you can get better help.
It is possible to use this setup but the NAT part can be rather complex and probably only a primary/backup scheme can be achieved.
Hope to help
Giuseppe
04-28-2009 04:08 AM
interface FastEthernet0/0
description $ETH-LAN$$ETH-SW-LAUNCH$$INTF-INFO-FE 0/0$
no ip address
ip nat inside
ip virtual-reassembly
ip policy route-map GCSSMAP
duplex auto
speed auto
h323-gateway voip interface
service-policy input block-p2p
!
interface FastEthernet0/0.1
description ***Data***
encapsulation dot1Q 1 native
ip address 10.10.20.1 255.255.255.0
ip nat inside
ip virtual-reassembly
!
interface FastEthernet0/0.3
description ***Voice***
encapsulation dot1Q 3
ip address 10.10.21.1 255.255.255.0
ip nat inside
ip virtual-reassembly
!
!
interface FastEthernet0/1
description **WIMAX-GCSSB1**
no ip address
ip nat outside
ip virtual-reassembly
duplex auto
speed auto
pppoe enable group global
pppoe-client dial-pool-number 1
no cdp enable
!
!
interface FastEthernet0/2/0
description **WIMAX-GCSSB2**
no ip address
ip nat outside
ip virtual-reassembly
duplex auto
speed auto
pppoe enable group global
pppoe-client dial-pool-number 2
no cdp enable
!
interface Serial0/3/0
no ip address
no ip redirects
no ip unreachables
no ip proxy-arp
ip flow ingress
clock rate 2000000
!
interface Serial0/3/1
bandwidth 512
ip address 10.10.250.14 255.255.255.252
no ip redirects
no ip unreachables
no ip proxy-arp
ip nbar protocol-discovery
ip flow ingress
clock rate 2000000
service-policy output voip-qos
!
interface Vlan1
no ip address
!
interface Dialer0
no ip address
!
interface Dialer1
mtu 1492
ip address negotiated
ip nat outside
ip virtual-reassembly
encapsulation ppp
dialer pool 1
dialer-group 1
ppp authentication chap pap callin
ppp chap hostname gcssb1
ppp chap password 7 14001F52010D7A3F23
ppp pap sent-username gcssb1 password 7 02110902060F5F354B
!
interface Dialer2
mtu 1492
ip address negotiated
ip nat outside
ip virtual-reassembly
encapsulation ppp
dialer pool 2
dialer-group 2
ppp authentication chap pap callin
ppp chap hostname gcssb2
ppp chap password 7 0451060E1875425E07
ppp pap sent-username gcssb2 password 7 1213081F055F021424
!
!
ip route 0.0.0.0 0.0.0.0 Dialer1
ip route 0.0.0.0 0.0.0.0 Dialer2
!
!
ip nat inside source route-map b1 interface Dialer1 overload
ip nat inside source route-map b2 interface Dialer2 overload
!
!
access-list 1 permit 10.10.20.0 0.0.0.127
access-list 2 permit 10.10.20.128 0.0.0.127
route-map b2 permit 30
match ip address 2
match interface Dialer2
!
route-map b1 permit 20
match ip address 1
match interface Dialer1
04-28-2009 04:14 AM
Hello Kamar,
to have a primary/secondary setup use
ip route 0.0.0.0 0.0.0.0 Dialer1
ip route 0.0.0.0 0.0.0.0 Dialer2 100
this should provide stability in internet access but also for this ACLs matching the whole client vlan need to be used in NAT config
access-list 3 permit 10.10.20.0 0.0.0.255
Hope to help
Giuseppe
04-28-2009 10:57 AM
if i do as above i will have only one of the links active and the other one will be standby, and what i want to achieve is to have both links active at the same time and this is where the i have the problem any suggestion?
04-28-2009 11:50 AM
Karam,
Please explain a bit more about how unstable they were.
Active/Active is what the router can do with per-destination load-balancing. It's hard to say when you are connecting Website-A having multiple public ip addresses. That may be a problem if you are connecting it with multiple sources(NATed at 2 links).
I would not be concerned about DNS because you said that they are the same ISP.
HTH,
Toshi
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