Solved: Cisco 1801 - Ping - Request Timed Out

offpister · ‎06-09-2011

Hello everyone,

I have a Cisco 1801 Router, but whenever there is anything plugged into the integrated 8 port switch for example two computers, I cannot get them to ping each other. All of the ports are on the same vLAN.

I am a Cisco newbie, so sorry if this question/query is really basic. Is there anyway I can test the integrated switch to see if it is faulty - what is the likelihood of this happening???

Any suggestions/solutions welcome.

Thanks

Jonathan Worth.

Network Manager

Hesa Limited

paolo bevilacqua · ‎06-11-2011

That seems to indicate a faulty unit.

If you don't have a support contract to have it replace by Cisco, it's not expensive to buy one.

View solution in original post

paolo bevilacqua · ‎06-09-2011

Begin disabling firewall on the PCs.

offpister · ‎06-09-2011

Hi,

I have done this. I can also ping the computers when they are connected to an unmanaged switch. I am using the switch part of the router out of box without any configuration - is this possible?

If not, please can you advise me on what configuration I need to do to get this working.

If I configure the FE0 port of the router with an IP address I can ping this, it is only when I have connected two computers to the switch interfaces that I cannot ping.

It also seems intermittent - I can get two pings sometimes and then nothing and then maybe one another time.

Thanks,

Jonathan.

bsoth · ‎06-09-2011

You may need to configure a BVI (Bridged Virtual interface) to get those switch ports onto the same broadcast domain as the FE0 port.

Add a sho run and show vlan and we can take a look

offpister · ‎06-09-2011

Hello,

Thanks for your reply. Here is the show run output:

Router#show run
Building configuration...

Current configuration : 1044 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname Router
!
boot-start-marker
boot-end-marker
!
logging message-counter syslog
!
no aaa new-model
ip source-route
!
!
!
!
ip cef
no ip domain lookup
multilink bundle-name authenticated
!
!
archive
log config
hidekeys
!
!
!
!
!
interface FastEthernet0
no ip address
shutdown
duplex auto
speed auto
!
interface BRI0
no ip address
encapsulation hdlc
shutdown
!
interface FastEthernet1
duplex full
speed 100
!
interface FastEthernet2
duplex full
speed 100
!
interface FastEthernet3
!
interface FastEthernet4
!
interface FastEthernet5
!
interface FastEthernet6
!
interface FastEthernet7
!
interface FastEthernet8
shutdown
!
interface ATM0
no ip address
shutdown
no atm ilmi-keepalive
!
interface Vlan1
ip address 192.168.2.2 255.255.255.0
!
interface Dialer0
no ip address
shutdown
!
ip forward-protocol nd
!
no ip http server
!
!
control-plane
!
!
line con 0
line aux 0
line vty 0 4
login
!
end

Router#

Here is show vlan-switch:

Router#show vlan-switch

VLAN Name                             Status    Ports
---- -------------------------------- --------- -------------------------------
1    default                          active    Fa1, Fa2, Fa3, Fa4, Fa5, Fa6
                                                Fa7, Fa8
1002 fddi-default                     act/unsup
1003 token-ring-default               act/unsup
1004 fddinet-default                  act/unsup
1005 trnet-default                    act/unsup

VLAN Type SAID       MTU   Parent RingNo BridgeNo Stp BrdgMode Trans1 Trans2
---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ ------
1    enet 100001     1500 -      -      -        -    -        1002   1003
1002 fddi 101002     1500 -      -      -        -    -        1      1003
1003 tr    101003     1500 1005   0      -        -    srb      1      1002
1004 fdnet 101004     1500 -      -      1        ibm -        0      0
1005 trnet 101005     1500 -      -      1        ibm -        0      0
Router#

I do not want/need to use the FE0 port. I want to use the FE1-FE8 as my internal switch and the ADSLoPOTS connection for a PPPoA ADSL broadband connection.

Thanks.

Jonathan Worth.

paolo bevilacqua · ‎06-09-2011

To begin with add spanning-tree portfast under interface range fa1 - 8.

The connected PCs must be able to ping each other and the router.

Then there is a bunch of config needed for a good job, my recommendation would be get someone knowledgeable and avoid loosing time yourself with it.

offpister · ‎06-10-2011

Hi,

Thanks for the replies. Would it be safe to assume that the integrated switch is working ok and that I can expect this because I need to do some more configuration?

I also have the switch uplinked to an unmanaged switch. Would this be ok or is this that is causing the ping problems?

Also, as this is just a test/lab setup I just want to be able to successfully ping two devices that are connected to the network and know that the switch is functioning correctly before I expand and configure other things on the router.

I am currently at work at the minute, but will let you know later if "spanning-tree portfast" does anything.

Below is the output from Pinging a PC that is connected directly to the Cisco Router - Switch interface (FE2) from a PC that goes through the unmanaged switch that is connected to the Cisco Router - Switch interface (FE1):

Reply from 192.168.2.32: bytes=32 time=1ms TTL=128