Comcast Business Router to Cisco Router

[chueymtz]

Hello,

I have a comcast router with 5 static ip's, I'm trying to figure out what my default route should be as I tried the one i see on my modem which shows a wan ip address of 73.x.x.76 and the wan gateway 73.x.x.1, I can't seem to get it to work when i run sh ip route it says gateway of last resort is not set. I'm not sure how else to get this to work, this is my secondary isp so it works with my other route which is my century link connection but when that disconnects it says theres no secondary route even though i have the 73.x.x.1 on.

This is what is currently in there:

ip route 0.0.0.0 0.0.0.0 65.x.x.85 
ip route 0.0.0.0 0.0.0.0 GigabitEthernet0/2

but it doesn't work with this either

ip route 0.0.0.0 0.0.0.0 73.x.x.1

any help would be greatly appreciated.

Below is what shows with the working century link route:

Gateway of last resort is 65.x.x.85 to network 0.0.0.0

S* 0.0.0.0/0 [1/0] via 65.144.247.85
65.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 65.x.x.84/30 is directly connected, GigabitEthernet0/1
L 65.x.x.86/32 is directly connected, GigabitEthernet0/1
70.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 70.x.x.64/29 is directly connected, Vlan2
L 70.x.x.67/32 is directly connected, Vlan2
74.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 74.x.x.232/29 is directly connected, Vlan1
L 74.x.x.233/32 is directly connected, Vlan1

Below is what is not working when on comcast:

Gateway of last resort is not set

70.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 70.x.x.64/29 is directly connected, Vlan2
L 70.x.x.67/32 is directly connected, Vlan2
74.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 74.x.x.232/29 is directly connected, Vlan1
L 74.x.x.233/32 is directly connected, Vlan1

[balaji.bandi]

couple of question, when you have static IP from ISP, it is routed to your network already, so you need to configure 1 of the interface that IP as secondary start using it.

wan ip address of 73.x.x.76 and the wan gateway 73.x.x.1,

as per the output you posted, none of the interface has this IP configured ? what we missing here ?

[chueymtz]

so i have that 73.x.x.76 ip address tied go gi0/2, gi0/1 is tied to the century link wan 65.x.x.86, comcast will not give me the gateway for this address, century link gave us there's 65.x.x.86 and gateway 65.x.x.85 so i used that as the static ip route for their's.

[balaji.bandi]

so i have that 73.x.x.76 ip address tied go gi0/2

we do not see that information here.

post  output of - show run and show IP interface brief

[Richard Burts]

I am glad to see that you have started a new discussion since the previous discussion focus was about arp. This gives us a fresh start and a focus on routing issues. In the previous discussion you indicated that you are using PBR for traffic going to both ISP. Is PBR still part of your configuration?

The biggest issue I see in the limited information in the original post is that G0/2 does not show up in the outputs. This suggests that the interface is not up (or does not have an IP address configured). Can you post the output of show ip interface brief? And I agree that the complete output of show run would be very helpful.