11-05-2009 08:22 AM - edited 03-06-2019 08:27 AM
Please can someone help me here I am having trouble pinging between two vlans I have one 3640 L3 switch and two pc connected to it one is in vlan 2 and one is in vlan 3 and vlan2 machine connected to int fas0/2 and vlan machine connected to int fas0/3 and both machines can ping to its vlan interfaces but can ping each other I dont know what is wrong I am doing. Please see my configuration and advice what I have to do?
--------------------
switch#show running-config
Building configuration...
Current configuration : 1516 bytes
!
version 12.3
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname switch
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
ip subnet-zero
!
!
ip cef
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
interface FastEthernet0/0
switchport access vlan 3
no ip address
!
interface FastEthernet0/1
switchport access vlan 2
no ip address
!
interface FastEthernet0/2
switchport access vlan 2
no ip address
!
interface FastEthernet0/3
switchport access vlan 3
no ip address
!
interface FastEthernet0/4
no ip address
shutdown
!
interface FastEthernet0/5
no ip address
shutdown
!
interface FastEthernet0/6
no ip address
shutdown
!
interface FastEthernet0/7
no ip address
shutdown
!
interface FastEthernet0/8
no ip address
shutdown
!
interface FastEthernet0/9
no ip address
shutdown
!
interface FastEthernet0/10
no ip address
shutdown
!
interface FastEthernet0/11
no ip address
shutdown
!
interface FastEthernet0/12
no ip address
shutdown
!
interface FastEthernet0/13
no ip address
shutdown
!
interface FastEthernet0/14
no ip address
shutdown
!
interface FastEthernet0/15
switchport mode trunk
no ip address
shutdown
!
interface Vlan1
no ip address
shutdown
!
interface Vlan2
ip address 172.16.20.1 255.255.255.0
!
interface Vlan3
ip address 172.16.30.1 255.255.255.0
!
ip http server
no ip http secure-server
ip classless
ip route 0.0.0.0 0.0.0.0 172.16.40.1
!
!
!
!
!
!
!
!
!
!
!
line con 0
line aux 0
line vty 0 4
!
!
end
--------------------
11-05-2009 08:35 AM
Dear Khalid,
You need to enable routing for the communication of two different VLANs:
Switch(config)#ip routing
Switch#show run
!
!
ip subnet-zero
ip routing
!
Regards,
Anser
11-05-2009 08:46 AM
I hit this command hudered times but I don't know its not turning it on ?
and strangely its not showing any error as well when I hit ip routing command
any suggestion
11-05-2009 08:56 AM
khalid,
Do you have default gateway configured on your PCs?
HTH
Reza
11-05-2009 09:04 AM
yes the default gateways are configured on my pc's, default gateway for the machines is the vlan management address
11-05-2009 09:06 AM
Have you turned off any software firewalls you have running on the pc's ? The windows FW or any others like Zonealarm or Norton etc...
11-05-2009 09:16 AM
Great as I turn the firewall off it worked rightward but I have two question which is in my mind first why windows firewall blocking it as it doesn't have any link to this setup and 2nd why ip routing command not showing unable in show run ?
--------------
switch#show run
Building configuration...
Current configuration : 1523 bytes
!
version 12.3
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname switch
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
ip subnet-zero
!
!
ip cef
!
!
--------------
and still its routing ?
this confusing me please help
11-05-2009 09:20 AM
You need to troubleshoot:
# sh ip int br
Vlan interfaces should be UP/UP
# sh spanning-tree vlan 2 & 3
Vlan should belongs to the spanning tree.
Try shut then no shut under interface vlan 2 & 3
Regards,
Anser
11-05-2009 09:22 AM
please see this you might find something wrong
-------------------
switch#show ip int br
switch#show ip int brief
Interface IP-Address OK? Method Status Protocol
FastEthernet0/0 unassigned YES unset up down
FastEthernet0/1 unassigned YES unset up down
FastEthernet0/2 unassigned YES unset up up
FastEthernet0/3 unassigned YES unset up up
FastEthernet0/4 unassigned YES unset administratively down down
FastEthernet0/5 unassigned YES unset administratively down down
FastEthernet0/6 unassigned YES unset administratively down down
FastEthernet0/7 unassigned YES unset administratively down down
FastEthernet0/8 unassigned YES unset administratively down down
FastEthernet0/9 unassigned YES unset administratively down down
FastEthernet0/10 unassigned YES unset administratively down down
FastEthernet0/11 unassigned YES unset administratively down down
FastEthernet0/12 unassigned YES unset administratively down down
FastEthernet0/13 unassigned YES unset administratively down down
FastEthernet0/14 unassigned YES unset administratively down down
FastEthernet0/15 unassigned YES unset administratively down down
Vlan1 unassigned YES NVRAM administratively down down
Vlan2 172.16.20.1 YES NVRAM up up
Vlan3 172.16.30.1 YES NVRAM up up
switch#
switch#
switch#
switch#
switch#show sp
switch#show spanning-tree vl
switch#show spanning-tree vlan ?
<1-1005> VLAN id
switch#show spanning-tree vlan 2
VLAN2 is executing the ieee compatible Spanning Tree protocol
Bridge Identifier has priority 32768, address cc00.10b4.0000
Configured hello time 2, max age 20, forward delay 15
We are the root of the spanning tree
Topology change flag not set, detected flag not set
Number of topology changes 1 last change occurred 00:30:41 ago
from FastEthernet0/2
Times: hold 1, topology change 35, notification 2
hello 2, max age 20, forward delay 15
Timers: hello 0, topology change 0, notification 0, aging 0
Port 3 (FastEthernet0/2) of VLAN2 is forwarding
Port path cost 19, Port priority 128, Port Identifier 128.3.
Designated root has priority 32768, address cc00.10b4.0000
Designated bridge has priority 32768, address cc00.10b4.0000
Designated port id is 128.3, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
BPDU: sent 935, received 0
switch#show spanning-tree vlan 3
VLAN3 is executing the ieee compatible Spanning Tree protocol
Bridge Identifier has priority 32768, address cc00.10b4.0001
Configured hello time 2, max age 20, forward delay 15
We are the root of the spanning tree
Topology change flag not set, detected flag not set
Number of topology changes 1 last change occurred 00:30:48 ago
from FastEthernet0/3
Times: hold 1, topology change 35, notification 2
hello 2, max age 20, forward delay 15
Timers: hello 0, topology change 0, notification 0, aging 0
Port 4 (FastEthernet0/3) of VLAN3 is forwarding
Port path cost 19, Port priority 128, Port Identifier 128.4.
Designated root has priority 32768, address cc00.10b4.0001
Designated bridge has priority 32768, address cc00.10b4.0001
Designated port id is 128.4, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
BPDU: sent 938, received 0
11-06-2009 10:55 AM
Hi.
What model of switch is it? I am a little amazed to see 12.3 mentioned as the IOS version for the switch as to my knowledge all Cisco switches are at the most at IOS 12.2S
!
version 12.3
Is it a switch module in a router?
Regards, Ingolf
11-06-2009 01:49 PM
Ip routing does not show up because it is the default config for a router. If you do a no ip routing command it will show up because it is something other than the default . The FW blocks anything incoming if the conversation did not originate on that pc, thats what the FW is for so it will block any ping responses coming from anywhere else. this is obviously a router with a 16 port switchcard installed into it if its running 12.3 code.
11-06-2009 02:40 PM
Right - the interface FastEthernet0/0 also tells that it's a router with a switch module.
11-07-2009 10:06 AM
yes you are right I am using 3640 series IOS on GNS3 to test the configuration before implementing but I am not understanding why its not able to show ip routing in show run.
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