Cisco 1720 router, PIX 515 help with T1 and Cable configuration

[Teecee33]

I have a Cisco 1720 router with a T1 and Ethernet WIC. The router is plugged into a switch that is plugged into a Cisco Content Engine and a Cisco PIX 515. The pix plugs into my QoS box which plugs into my Cisco 3560 aka LAN. Currently I have all my traffic through the T1. I want to divert some traffic to use the cable modem service that I have. I already have the Cable modem plugged into the ethernet WIC and it receives a ip via DHCP from the cable company. How can I setup the router so that certain internal ip addresses use the T1 and the other internal IPs use the cable?

Here is my current config on my router.


version 12.3
!
memory-size iomem 25
mmi polling-interval 60
no mmi auto-configure
no mmi pvc
mmi snmp-timeout 180
no aaa new-model
ip subnet-zero
ip wccp web-cache
!
!
no ip domain lookup
ip domain name xxxxxxxxxx
ip name-server x.x.x.x
ip name-server x.x.x.x
!
ip cef
!
!
!
!
interface Ethernet0
ip address dhcp
ip access-group 100 in
ip wccp web-cache redirect out
full-duplex
!
interface FastEthernet0
ip address 207.x.x.x 255.255.255.224
speed auto
!
interface FastEthernet0.1
!
interface Serial0
ip address 66.x.x.x 255.255.255.252
ip access-group 100 in
ip wccp web-cache redirect out
encapsulation ppp
no fair-queue
service-module t1 timeslots 1-24
service-module t1 remote-alarm-enable
no cdp enable
!
ip classless
ip route 0.0.0.0 0.0.0.0 Serial0
no ip http server
!
!
access-list 1 permit 192.168.0.0 0.0.255.255
access-list 100 deny ip host 127.0.0.1 any
access-list 100 deny ip 192.168.0.0 0.0.255.255 any
access-list 100 deny ip 10.0.0.0 0.255.255.255 any
access-list 100 deny ip 172.16.0.0 0.0.240.255 any
access-list 100 deny ip 207.x.x.x 0.0.0.255 any
access-list 100 permit ip any any

 

[Teecee33]

Little more info. Currently I use the PIX to translate some external static IPs to some of my internal servers for mail, web, etc. I would prefer to keep those on the T1 including some users and then assign the rest of the users to the cable.

 

[Teecee33]

No one has an ideas on this?

 

[anddaley]

Ok first of all if you want to run parallel internet connections I would recommend that you replace that 1720 router with a 2600.The 1700 series routers dont handle parallel internet connection very well.(Just copy the T1 settings over to the 2600)

That said, to accomplish your desire for splitting traffic over those links, you just need to create static routes that sends traffic from your LAN over cable modem link and the WEBservers over the T1 link.

this default route has to be taken out:
"ip route 0.0.0.0 0.0.0.0 Serial0"

You are actully wise in letting the WEBstuff stay on the the T1 because if you change that you are going to have to redo you NAT stuff on the PIX.

You didnt mention if your WEBservers were on the DMZ interface of the PIX....This would also be wise to do and would make this even easier.

 

[Teecee33]

Would you recommend a 2610, 2620, or 2621?

Do WICs on a 1720 work on a 2600 router? I would assume they do.

 

[anddaley]

It doesnt really matter, I am using a 2611 to do the same thing here at Bank of Butterfield.

Regards to interchanging WIC's I have never done this before but yes I can assure you its perfectly OK to do so. HOWEVER: There are some issues with ethernet WIC's.

The WIC 1T's (serial WICS) work well in both routers but some ethernet WICS wont.