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cisco 1600 setup

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1 reply

by bimsha

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I'm having trouble setting up my cisco 1602 with a wic 1dsu-t1 interface. My ISP insist it is my router. Here is the problem I have a fti going to my router. My isp ip is 64.80.181.251, the wic have the static IP 64.80.181.252(serial1)
Ehernet0 ip 192.168.5.25. I can ping to the eth0 and serial1. But I can't ping to my isp dns or ip address. Below is a printout of (#sh run)

User Access Verification

Building configuration...

Current configuration:
version 12.0
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
service udp-small-servers
service tcp-small-servers
!
hostname usauncisco
!
ip subnet-zero
no ip domain-lookup
!
interface Ethernet0
description connected to EthernetLAN
ip address 192.168.5.25 255.255.255.0
no ip directed-broadcast
!
interface Serial0
no ip address
no ip directed-broadcast
shutdown

!
interface Serial1
description connected to Internet
ip address 64.80.181.252 255.255.255.252
no ip directed-roadcast
service-module t1 ti 19-20
router rip

passive-interface Serial1
network 192.168.5.0
no auto-summary
!
ip classless
ip route 0.0.0.0 0.0.0.0 64.80.181.251

1 reply

by ispnetworker

Please check your address assignment. You are using a /30 mask and the addresses you specify exist in two separate /30 networks. /30 network boundaries are .248 and .252, so the address pairs should be .249 and .250 or .253 and .254. It is possible your ISP is using /31 mask as IOS now supports this to reduce wasted address space; however, even in this scenario, you would not have .251 and .252 as address peers.

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