ZAKY
| Re: 2 ISP on 2 Interface
Hi,
WE have 2821 Cisco router with 2 Ser. Int. for 2 ISP's.
1. How to configure both ISP's running simultanously
2. How to configure so that VOIP traffic should go through S1 (ISP A) & browsing should go through S2 (ISP B).
NAT overload is not working with 2 ISP's
Regards,
Nadeem |
|
tildeleb
Premium
join:2004-06-22
Sunnyvale, CA
| This isn't going to help you much, I'll say that up-front.
I have run some experiments with two DSL lines on single Cisco Router. The more things you want to do, the harder it gets to configure IOS the way you want.
1. It isn't hard to actually configure the two serial interfaces, correct?
2. You should be able to make the VOIP traffic go to ISP A by using policy based routing. In general, policy routing is your friend with multiple interfaces.
3. When you say NAT isn't working what do you mean?
It's not hard to make NAT work for a single interface right?
What you can easily do as a second step is assign different local IP ranges for different interfaces. For example 192.168.0.0/24 for ISP A and 192.168.1.0/24 for ISP B.
Getting NAT load sharing isn't too hard you can use "ip nat pool" with two "address" statements and then do "ip nat inside source list 10 pool test overload".
Post your current config if you have more questions.
--
~leb |
|
zaky
| Thanks for your reply.
Given below is my config kindly suggest me the appropriate corrections.
interface GigabitEthernet0/0
description LAN
ip address 255.255.255.0
ip nat inside
ip virtual-reassembly
ip policy route-map PBR_Traffic
duplex auto
speed auto
!
interface GigabitEthernet0/1
description Sify ISP
ip address
ip nat outside
ip virtual-reassembly
duplex auto
speed auto
!
interface Serial0/0/0
no ip address
shutdown
!
interface FastEthernet0/1/0
description Airtel_Testing
ip address
ip nat outside
ip virtual-reassembly
duplex auto
speed auto
!
ip forward-protocol nd
ip route 0.0.0.0 0.0.0.0 FastEthernet0/1/0
ip route 0.0.0.0 0.0.0.0 GigabitEthernet0/1 10
no ip http server
no ip http secure-server
!
!
ip nat inside source route-map ISP1 interface FastEthernet0/1/0 overload
ip nat inside source route-map ISP2 interface GigabitEthernet0/1 overload
!
ip access-list extended Interesting_Traffic
permit udp any any eq 4569
permit udp any any eq 5004
permit udp any any eq 5036
permit udp any any eq 5060
permit ip host any
permit ip any host
permit udp any any eq 443
permit ip any host
deny ip any any
ip access-list extended LAN
permit ip 0.0.0.255 any
!
!
!
!
route-map PBR_Traffic permit 10
match ip address Interesting_Traffic
set interface GigabitEthernet0/1 FastEthernet0/1/0
!
route-map ISP2 permit 10
match ip address LAN
set ip next-hop
!
route-map ISP1 permit 10
match ip address LAN
set ip next-hop
Regards, |
|
