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Help! Trying to set up VLAN across two switches and be able to ping between hosts.

The51stAgent
Level 1
Level 1

Hey guys. I'm still in the early stages of this stuff. I have a Cisco 1841 router double NATing from my ISP router. My 1841 router is then connected to switch 1 via Fa0/1. Switch 1 is connected to switch 2 via Fa0/13 on both switches.I trunked it. So if I have some ports set for Vlan 50 on both switches why would they not be able to ping each other? I may have some leftover configurations in these outputs but I tried to clear out everything from the messing around I did previous to this. Please let me know what I am doing wrong.This is driving me crazy. Suggestions for configs for starting anew (that would help me all the same)? All I want to do is set up a VLAN that spans across two switches and allows me to ping between hosts on that same VLAN that are connected to different switches. I am at my wits end. Also, this is not an issue of firewalls blocking the pings. I am sure of that, as I have temporarily turned them off and was able to ping in other scenarios I have set up in the past. Below are configs for Sw1 and 2.
Thank you,

Switch#show vlan brief

 

VLAN Name                             Status    Ports

---- -------------------------------- --------- -------------------------------

1    default                          active    Fa0/1, Fa0/3, Fa0/4, Fa0/6

                                                Fa0/7, Fa0/8, Fa0/9, Fa0/10

                                                Fa0/11, Fa0/12, Fa0/14, Fa0/15

                                                Fa0/16, Fa0/17, Fa0/18, Fa0/19

                                                Fa0/20, Fa0/21, Fa0/22, Fa0/23

                                                Fa0/24, Gi0/1, Gi0/2

50   VLAN0050                         active    Fa0/2, Fa0/5

1002 fddi-default                     act/unsup

1003 token-ring-default               act/unsup

1004 fddinet-default                  act/unsup

1005 trnet-default                    act/unsup

Switch#

Switch#

Switch#show running-config

Building configuration...

 

Current configuration : 1303 bytes

!

version 12.2

no service pad

service timestamps debug uptime

service timestamps log uptime

no service password-encryption

!

hostname Switch

!

!

no aaa new-model

system mtu routing 1500

ip subnet-zero

!

!

!

!

!

!

no file verify auto

spanning-tree mode pvst

spanning-tree extend system-id

!

vlan internal allocation policy ascending

!

interface FastEthernet0/1

!

interface FastEthernet0/2

 switchport access vlan 50

!

interface FastEthernet0/3

!

interface FastEthernet0/4

!

interface FastEthernet0/5

 switchport access vlan 50

!

interface FastEthernet0/6

!

interface FastEthernet0/7

!

interface FastEthernet0/8

!

interface FastEthernet0/9

!

interface FastEthernet0/10

!

interface FastEthernet0/11

!

interface FastEthernet0/12

!

interface FastEthernet0/13

 switchport mode trunk

!

interface FastEthernet0/14

!

interface FastEthernet0/15

!

interface FastEthernet0/16

!

interface FastEthernet0/17

!

interface FastEthernet0/18

!

interface FastEthernet0/19

!

interface FastEthernet0/20

!

interface FastEthernet0/21

!

interface FastEthernet0/22

!

interface FastEthernet0/23

!

interface FastEthernet0/24

!

interface GigabitEthernet0/1

!

interface GigabitEthernet0/2

!

interface Vlan1

 ip address dhcp

 no ip route-cache

!

ip http server

ip http secure-server

!

control-plane

!

!

line con 0

line vty 5 15

!

end

 

 

Switch#show interfaces trunk

 

Port        Mode         Encapsulation  Status        Native vlan

Fa0/13      on           802.1q         trunking      1

 

Port        Vlans allowed on trunk

Fa0/13      1-4094

 

Port        Vlans allowed and active in management domain

Fa0/13      1,50

 

Port        Vlans in spanning tree forwarding state and not pruned

Fa0/13      1,50

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

And Switch 2:

Switch2#show running-config

Building configuration...

 

Current configuration : 1495 bytes

!

version 12.2

no service pad

service timestamps debug uptime

service timestamps log uptime

no service password-encryption

!

hostname Switch2

!

!

no aaa new-model

system mtu routing 1500

ip subnet-zero

!

!

!

!

!

!

no file verify auto

spanning-tree mode pvst

spanning-tree extend system-id

!

vlan internal allocation policy ascending

!

interface Port-channel1

!

interface FastEthernet0/1

 switchport access vlan 99

 switchport mode access

!

interface FastEthernet0/2

 switchport access vlan 50

!

interface FastEthernet0/3

!

interface FastEthernet0/4

!

interface FastEthernet0/5

!

interface FastEthernet0/6

!

interface FastEthernet0/7

!

interface FastEthernet0/8

!

interface FastEthernet0/9

!

interface FastEthernet0/10

!

interface FastEthernet0/11

!

interface FastEthernet0/12

!

interface FastEthernet0/13

!

interface FastEthernet0/14

 channel-group 1 mode on

!

interface FastEthernet0/15

 channel-group 1 mode on

!

interface FastEthernet0/16

!

interface FastEthernet0/17

!

interface FastEthernet0/18

!

interface FastEthernet0/19

!

interface FastEthernet0/20

!

interface FastEthernet0/21

!

interface FastEthernet0/22

 switchport access vlan 99

!

interface FastEthernet0/23

!

interface FastEthernet0/24

!

interface GigabitEthernet0/1

 switchport access vlan 99

 switchport mode dynamic desirable

!

interface GigabitEthernet0/2

!

interface Vlan1

 no ip address

 no ip route-cache

!

ip http server

ip http secure-server

!

control-plane

!

!

line con 0

line vty 0 4

 login

line vty 5 15

 login

!

end


Switch2#show interface trunk

 

Port        Mode         Encapsulation  Status        Native vlan

Fa0/13      auto         802.1q         trunking      1

 

Port        Vlans allowed on trunk

Fa0/13      1-4094

 

Port        Vlans allowed and active in management domain

Fa0/13      1,50

 

Port        Vlans in spanning tree forwarding state and not pruned

Fa0/13      1,50

Switch2#show vlan brief

 

VLAN Name                             Status    Ports

---- -------------------------------- --------- -------------------------------

1    default                          active    Fa0/3, Fa0/4, Fa0/5, Fa0/6

                                                Fa0/7, Fa0/8, Fa0/9, Fa0/10

                                                Fa0/11, Fa0/12, Fa0/14, Fa0/15

                                                Fa0/16, Fa0/17, Fa0/18, Fa0/19

                                                Fa0/20, Fa0/21, Fa0/23, Fa0/24

                                                Gi0/2

50   VLAN0050                         active    Fa0/2

1002 fddi-default                     act/unsup

1003 token-ring-default               act/unsup

1004 fddinet-default                  act/unsup

1005 trnet-default                    act/unsup

 

 

 

 

 

 

 

 

 

 

 

2 Replies 2

Reza Sharifi
Hall of Fame
Hall of Fame

Hi,

For testing, if you are using only one vlan (50) you can but don't have to trunk the connection between the 2 switches. You can simply configure port fa0/13 on both switch as access port.

config t

int fa0/13

switchport 

switchport mode access 

switchport access vlan 50

 

same on switch-2

Now if you pick a port (say fa0/1) on both switches,configure them the same as above (access port with vlan 50) and connect 2 laptops to these ports, give each laptop an IP in the same subnet, you should be able to ping between the 2 hosts.

laptop-1 port fa0/1 ip 10.10.10.2

laptop-2 port fa0/1 ip 10.10.10.3

HTH 

 

I don't see anything in my quick perusal of your code that would suggest a lingering configuration blocking the ports from communicating with each other.

 

I've seen some strange things on switches before where the interfaces for the VLAN are not active and this causes issue. You could check this with "show run int vlan 50"; if it comes back saying it doesn't exist, you just create it by going into the interface (int vlan 50) and this will  create the VLAN interface and set it to Up/Up. Do it on both switches.


If that doesn't work, I would honestly start over: it's not worth the stress.

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