Assign IP's

Unanswered Question
Feb 17th, 2008

I have been assigned the following from my ISP.

WAN: /30 (

Your IP Address Subnet Block:

Network: /29



Default Route:

I have a Cisco 1760 with a 4 port switch. I setup FastEthernet 0/0 as Should I then setup a Vlan as and assign .18 and .19 to my servers?

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Overall Rating: 3.7 (3 ratings)
Edison Ortiz Sun, 02/17/2008 - 13:46

Make sure to incorporate a default route to (ISP router connected to you) in your configuration.

Other than that, it should work provided the ISP is announcing the out to the internet.

The servers .18 and .19 should have a default gateway to .17.




bmacbride Sun, 02/17/2008 - 16:55

Thanks, that helps.

To set the default route, it this correct?

ip route

bmacbride Sun, 02/17/2008 - 19:00

I have completed that. The servers can see each other, but I can not get to the internet. My WAN, fastethernet0/0 is up, but the protocol is down. When I look at ip routes, it says Gateway of last resort not set. Its shows is subnetted, is directly connected , VLAN1.

Any suggestions?

Edison Ortiz Sun, 02/17/2008 - 21:17

>My WAN, fastethernet0/0 is up, but the protocol is down.

We need to make sure the interface is up/up before dealing with any ip route issues.

What's the device providing the connection to F0/0?



Edison Ortiz Mon, 02/18/2008 - 07:04

You need to troubleshoot that connection. Make sure the encapsulation matches (are they using PPPoE?) and the wiring is correct.

The goal is to have the FasEthernet up/up.

bmacbride Mon, 02/18/2008 - 07:33

I have entered the default route. When I look at routes, it still says Gateway of last resort not set. Is this normal?

Edison Ortiz Mon, 02/18/2008 - 07:37

The next-hop is not available at the moment since the FastEthernet is down. Once the FastEthernet is up/up, the route will be shown.

Wasn't I helpful on my previous post? not sure about the rating of '1'.

There is nothing I can suggest about bringing a LAN interface up/up other than checking wiring issues. Is that simple.

bmacbride Mon, 02/18/2008 - 07:46

Thanks for you help. I appreciate it. Your advice.

"You need to troubleshoot that connection." That is what I am doing.

"Make sure the encapsulation matches (are they using PPPoE?)" I guess I should have been more specific. It is ethernet to another router.

"The goal is to have the FasEthernet up/up."

Edison Ortiz Mon, 02/18/2008 - 07:51

PPPoE is done over Ethernet and that's the only protocol that I can think of, which would prevent an LAN interface from coming up/up if the wiring is fine.

If it's Ethernet to another router, you need a xover cable.

Good luck with dealing with the Colo tech-support :)


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