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Help with switching and routing

Grant Serbousek
Level 1
Level 1

What am I missing?

I've got a verizon fios router (IP 10.1.1.2) acting as DHCP server for network 10.1.1.0/24. I have a route configured: destination: 192.168.10.0/24 and gateway 10.1.1.2.

Connected to a Cisco C2950G all in VLAN1 (to be edited later) distributing the 10.1.1.0/24 network, that connects to an Apple Airport extreme in bridge mode.

A Cisco 2611XM router f0/0 ip 10.1.1.249 connected to the airport extreme listed above. Interface f0/1 ip: 192.168.10.235 and a DHCP server configured on this router for the 192.168.10.0/24 network.  Interface 0/1 is connected to a Cisco 3512 also all on VLAN1.

1) Host connected to Cisco 3512 (192.168.10.0/24 network) won't get a default gateway from my router.  Why?

2) Host connected to Cisco 3512 (192.168.10.0/24 network) can't ping my Verizon router (10.1.1.2) - I get a "PING: transmit failed. General failure". Why?

3) Host connected to Airport Extreme (10.1.1.18) can ping Cisco 2611XM router f0/0 (10.1.1.249) and f0/1 (192.168.10.235) but cannot ping a host (192.168.10.2) connected to the 192.168.10.0/24 network via Cisco 3512.  Why?

4) I can't ping google.com from the switch.  Why?

version 12.4

service timestamps debug datetime msec

service timestamps log datetime msec

boot-start-marker

boot-end-marker

logging buffered 51200 warnings

aaa new-model

aaa authentication login default local

aaa session-id common

clock timezone EST -5

no network-clock-participate slot 1

no network-clock-participate wic 0

no ip dhcp use vrf connected

ip dhcp pool america

import all

network 192.168.10.0 255.255.255.0

dns-server 10.1.1.2

ip name-server 10.1.1.2

multilink bundle-name authenticated

vlan internal allocation policy ascending

ip route 0.0.0.0 0.0.0.0 FastEthernet0/0

ip route 10.1.1.0 255.255.255.0 FastEthernet0/1

ip route 192.168.10.0 255.255.255.0 FastEthernet0/0

no ip http server

no ip http secure-server

version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
service password-encryption

hostname TESTBED-01-2611XM

boot-start-marker
boot-end-marker

logging buffered 51200 warnings

aaa new-model

aaa authentication login default local

aaa session-id common
clock timezone EST -5
no network-clock-participate slot 1
no network-clock-participate wic 0
ip cef

ip dhcp pool america

import all
network 192.168.10.0 255.255.255.0
dns-server 10.1.1.2

ip name-server 10.1.1.2

multilink bundle-name authenticated

vlan internal allocation policy ascending

interface FastEthernet0/0

ip address 10.1.1.249 255.255.255.0

duplex auto

speed auto

interface FastEthernet0/1

ip address 192.168.10.235 255.255.255.0

duplex auto

speed auto

no ip http server

no ip http secure-server

control-plane

Thanks,

G

2 Accepted Solutions

Accepted Solutions

Wilson Bonilla
Level 3
Level 3

Hello.

Can you post a topology diagram?

If the DHCP server is in a different vlan from where the users are you should have a relay agent to help the users reach the server leasing ip addresses.

What IP address are the users currently getting?

Regards.

Wilson B

View solution in original post

Ping Transit Failed is because of routing Loop or bad Routes.

Jawad

View solution in original post

3 Replies 3

Wilson Bonilla
Level 3
Level 3

Hello.

Can you post a topology diagram?

If the DHCP server is in a different vlan from where the users are you should have a relay agent to help the users reach the server leasing ip addresses.

What IP address are the users currently getting?

Regards.

Wilson B

Ping Transit Failed is because of routing Loop or bad Routes.

Jawad

Thanks to those who replied...and yes, my routes were bad.

Instead of the following routes:

ip route 0.0.0.0 0.0.0.0 FastEthernet0/0

ip route 10.1.1.0 255.255.255.0 FastEthernet0/1

ip route 192.168.10.0 255.255.255.0 FastEthernet0/0

I should have had the single static route:

ip route 0.0.0.0 0.0.0.0 10.1.1.2

Q1)  I did not have the "default-router" configured in my DHCP pool - why my client wouldn't get a default gateway.

Q2) Answered via proper static route above

Q3) Also attributable to not having a default router configured for the DHCP pool.

And now it works.  I hope this helps someone in the future.

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